Flower Buds. Photo from H. Kavanagh on 21 August 2013. This plant is due to flower in June-July, but it appears to be a little out of sync! |
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Plant Name |
Thalictrum flavum subsp. glaucum ( Thalictrum flavum 'Glauca', |
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Common Name |
Glaucous-leaved yellow meadow rue, Yellow meadow rue, Dusty meadow rue |
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Soil |
Chalk, Loam, Clay. Mulch with 4 inch depth of organic compost in early spring and remove the mulch in September to keep the moisture in the soil, if these plants grown in full sun. |
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Sun Aspect |
Full Sun, Part Shade |
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Soil Moisture |
Moist and Well-drained |
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Plant Type |
Herbaceous Perennial |
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Height x Spread in inches (cms) |
48 x 48 (120 x 120) |
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Foliage |
Compound leaves (2-3 pinnate) with 3-4 lobed leaflets are silvery blue green. |
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Flower Shape, Natural Arrangement, Number of Petals and Flower Colour in Month(s). Seed |
Branched clusters of tiny Sulphur-Yellow, petalless flowers in June-July |
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Comment |
Erect Columnar Form. Pruning Group 14. "Thalictrum can be rhizomatous or tuberous perennials with ternately or pinnately divided, often attractive foliage, and panicles or racemes of small flowers with showy stamens and sometimes large colourful petal-like sepals. Thalictrum flavum subsp. glaucum is a robust herbaceous perennial to 1.5m in height, with 2 or 3-pinnate, glaucous green leaves and branched clusters of fluffy yellow flowers. Grow in moist, humus-rich soil in partial shade; can tolerate drier soil and more sun than many other species. May need staking." from Royal Horticultural Society. "Grow in average, medium moisture, well-drained soil in full sun to part shade. Prefers moist, rich, humusy soils in part shade or dappled sun. Needs consistent moisture if grown in full sun. This plant has better tolerance for heat and dryish soils than many of the other varieties of thalictrum. Taller stems often need staking. Plants may be cut back after bloom if foliage depreciates. May be grown from seed. This subspecies of yellow meadow rue is noted for having glaucous leaves and stems. It is native to Spain and northern Africa. It is a rhizomatous, clump-forming perennial that typically grows to 2-3’ tall, but infrequently rises to 5’ tall. Tiny sulphur yellow flowers in large panicles bloom in summer. Flowers have a slight fragrance. Compound leaves (2-3 pinnate) with 3-4 lobed leaflets are silvery blue green." from Missouri Botanical Garden. Video of the flowers from YouTube. "Its summertime pale yellow flowers are petalless and fringed, occurring in clusters atop chalky bluish gray stems. Plant at the back of a border; it may require staking. Like many meadow rues, dusty meadow rue earns it place in the garden with its foliage alone. It will do well as a backdrop or see-through plant in a mixed border and is suitable for a wild or woodland garden as well. Plants grow to 3 feet high and 2 feet wide. Provide moist, humus-rich soil in partial shade. It may require staking. Most Thalictrums are late to emerge in mid- to late spring." from Fine Gardening. - besides the Fine Gardening Magazine you can "Create your dream garden with our books & magazines on landscape design, plant care & basic gardening skills." Available from Royal Horticultural Society and Shoot in the UK with Lazy S'S Farm Nursery in America and Nutshell Perennial Nursery and Plant Farm in Australia. Crug Farm in America have other cultivars of Thalictrum available. |
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Companions |
... |
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Summer Form. Photo from H. Kavanagh on 21 August 2013. |
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Winter Form in left of middle from Mixed Borders at RHS Wisley. Photo from Chris Garnons-Williams on 4 March 2013. |
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Birch Branch Plant Support Structure in middle from Mixed Borders at RHS Wisley. Photo from Chris Garnons-Williams on 25 April 2013. |
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Spring Form from Mixed Borders at RHS Wisley. Photo from Chris Garnons-Williams on 13 May 2013. |
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Summer Form from Mixed Borders at RHS Wisley. Photo from H. Kavanagh on 21 August 2013. |
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Winter Foliage from Mixed Borders at RHS Wisley. |
Spring Foliage from Mixed Borders at RHS Wisley. |
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Spring Foliage from Mixed Borders at RHS Wisley. |
Autumn Foliage from Mixed Borders at RHS Wisley. |
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MIXED BORDER RHS WISLEY HERBACEOUS PERENNIALS GALLERY PAGES |
FOLIAGE COLOUR |
SEED/FRUIT COLOUR FLOWER BED PICTURES |
Starting with the data in Garden Style followed by Infill Plants, then you can refine your plant list from the remaining galleries in this cell:- |
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PERENNIAL |
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HERBACEOUS PERENNIAL Gallery with 7 Flower Colours (Red, Pink and Purple on same page) per Month in Colour Wheel. Click on Black or White box in Colour of Month. |
HERBACEOUS PERENNIAL INDEX -
The variety of plants that can be used in alpine gardening is obviously very large and very bewildering at first approach. With a view to easing the task of selection here are lists The standard potting and seed-soil recipes from The Propagation of Alpines by Lawrence D. Hills are at the bottom of the page on Alpine - Sink and Trough Gardens. |
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To compare |
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with 7 Flower Colours - Blue, White, Yellow, Green for Unusual, Red, Orange and Pink per Month in Colour Wheel below. Click on Black or White box in Colour of Month. |
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The Herbaceous Perennials in this gallery are not compared with other Herbaceous Perennials in the HERBACEOUS PERENNIAL GALLERY, but they are compared with each other in the Mixed Border Garden Design Gallery using the above 7 Flower Colours per month Wheel. FLOWER COLOUR RANGE IN 71 PARTS OF RHS WISLEY MIXED BORDER DURING After reviewing the situation in the |
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Blue = |
Green = |
Red = |
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Brown = |
Blue = |
Green = |
Red = |
Black = |
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Wet Soil |
Moist Soil |
Dry Soil |
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Flowering Months range abbreviates month Click on centre of thumbnail to move from this page to the The Comments Row of that Plant Description |
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Herbaceous Perennial |
Flowering Months |
Height x Width in inches (cms) - 1 inch = 2.5 cms, 12 inches = 1 foot = 30 cms, 36 inches = 3 feet = 1 yard = 90 cms, 40 inches = 100 cms |
Flower Thumb-nail |
Herbaceous Perennial Flower Thumbnail |
Flowering Months |
Height x Width in inches (cms) - 1 inch = 2.5 cms, 12 inches = 1 foot = 30 cms, 36 inches = 3 feet = 1 yard = 90 cms, 40 inches = 100 cms |
Flower Thumb-nail |
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Alpine Herbaceous Perennial if Text Background is Blue |
Alpine Herbaceous Perennial if Text Background is Blue |
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Evergreen or Semi-Evergreen Perennial |
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A |
A |
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May, June, |
48-60 x 24 |
96 x 40 |
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June, July, August, |
36 x 24 |
48 x 24 |
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June, July, |
48 x 18 |
40-60 x 20-40 (100-150 x 50-100) |
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June, July, |
36 x 18 |
June, July, |
60 x 40 |
Creamy-White. |
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June, July, |
48 x 24 |
32-39 x 24 (80-100 x 60) |
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May, June, |
36 x 24 |
July, August, September |
64 x 16 |
Violet-Blue. |
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June, July, |
20 x 15 |
August, September |
96 x 40 |
Dark Blue. |
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June, July, August, |
28 x 18 |
July, August |
40-60 x 4-20 (100-150 x 10-50) |
Violet-Blue. |
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June, July, August, |
36 x 16 |
24-48 x 18-24 |
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June, July, August, |
36-42 x 12 |
48 x 36 |
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June, July, |
16-48 x 12 |
70 x 40 |
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July, August, |
42 x 36 |
August, September, October |
80 x 24 |
Creamy-White. |
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July, August |
40 x 80 |
60 x 24 |
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December, January, |
18 x 30 |
40 x 20 |
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July, August, |
30 x 18 |
60 x 24 |
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June, July |
20 x 18 |
18 x 12 |
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July, August, |
24 x 24 |
July, August |
36 x 20 |
White. |
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July, August, |
30 x 24 |
32 x 24 |
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June, July |
72-96 x 24 |
36 x 16 |
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June, July |
72-96 x 24 |
40 x 16 |
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June, July |
72-96 x 24 |
July, August, September, October |
48 x 24 |
White. |
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June, July |
72-96 x 24 |
24 x 16 |
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June, July |
72-96 x 24 |
20-40 x 4-20 |
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June, July |
72 x 24 |
28 x 24 |
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June, July, |
4 x 20 |
July, August, September |
72 x 60 |
Pinkish-Lavender |
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June, July, |
16 x 12 |
60-100 x 40-60 |
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July |
24 x 230 |
20-40 x 20-40 |
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June, July, |
36 x 24 |
August, September, October |
24-40 x 24-40 |
Pale Pink. |
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August, September, |
36 x 24 |
40-60 x 20-40 |
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Pink - July, August or |
24 x 16 |
60 x 24 |
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July, August |
36 x 18 |
July, August, September |
60 x 24 |
Cream. |
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July, August |
25 x 16 |
August, September |
24 x 24 |
Yellowish-Brown. |
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May, June |
16 x 18 |
July, August, September |
60 x 18-24 |
Pink. |
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May, June |
30 x 12 |
September, October |
12-36 x 12-36 |
White. |
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June, July, August, September, October |
36 x 12 |
July, August, September, October |
4-20 x 4-20 |
Red and White. |
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July, August, |
28 x 16 |
September, October |
52 x 24 |
Mauve-Pink. |
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August, September, |
12 x 12 |
September, October |
60 x 16-24 |
Lilac-Blue. |
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July |
30 x 18 |
August, September |
12-18 x 8-12 |
Purple-Pink. |
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August, September |
8-12 x 10 |
45 x 78 |
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June |
20-24 x 12 |
September, October |
48 x 36 |
Purple-Red. |
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July |
24 x 18 |
August, September, October, November |
48-60 x 24 |
Pale Violet. |
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July, August |
39 x 24 |
24 x 16 |
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August, September |
48 x 24 |
B |
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June, July |
18-24 x 18 (45-60 x 45) |
40-60 x 20-40 |
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July, August |
24 x 18 |
C |
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July, August |
8-18 x 12 |
60 x 24 |
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June, July |
24 x 18 |
48 x 20 |
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B |
24-36 x 18-30 |
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April, May |
12-18 x 24 |
24 x 12 |
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April, May |
12-18 x 18 (30-45 x 45) |
June, July |
60-100 x 40-60 |
White. |
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June, July, August, |
24 x 18 |
20-40 x 4-20 |
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C |
24 x 24 |
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April |
9 x 12 |
August, September, October |
35 x 23 |
Opening Orange fades to Pink. |
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June, July, |
2 x 12 |
36 x 18 |
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June, July, |
36-48 x 24 |
June, July, August, September |
60 x 48 |
Purple. |
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June, July, |
24 x 24 |
D |
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July, August, September, |
36 x 24 |
May, June, July, August |
80 x 40 |
Creamy-Yellow-Green. |
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D |
E |
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July, August, September |
60 x 18 |
18-24 x 14 |
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Links to the other 22 Diascia Pages are in Alpine / Herbaceous Perennial Index D Page |
June, July, August, |
6 x 20 |
40 x 18 |
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May, June |
18 x 30 |
28 x 16 |
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May, June |
24-36 x 20 |
39 x 39 |
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E |
July, August |
18-48 x 24 |
Bright Blue. |
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July, August, September |
30-48 x 18 (75-120 x 45) |
40-60 x 20-40 |
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F |
12-60 x 24 |
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June |
6 x 6 |
White |
88 x 40 |
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G |
Eupatorium maculatum (Atropur-pureum Group) 'Riesen-schirm' |
July, August, September |
80 x 80 |
Pink-Purple. |
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August, September |
24 x 18 |
August, September, October |
60-100 x 20-40 |
Purplish-Pink. |
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June, July |
32 x 18 |
24 x 20 |
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June, July |
12 x 12 |
F |
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July, August, |
4 x 12 |
60-100 x 20-40 |
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July, August |
60 x 72 |
July, August |
72 x 18 |
Sulphur-Yellow. |
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H |
60 x 20 |
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September, October, |
60 x 18 |
G |
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August |
48 x 30 |
48 x 36 |
White. |
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August |
20 x 36 |
Deep Violet |
48 x 32 |
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July |
36 x 48 |
36 x 36 |
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K |
Geranium 'Rozanne' |
24 x 16 |
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September, October |
24 x 18 |
24 x 18 |
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July, August |
36 x 24 |
24 x 20 |
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September, October |
30 x 18 |
H |
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L |
July, August, September |
72 x 24 |
Yellow. |
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May, June, |
24 x 12 |
June, July, August |
36 x 24 |
Brick Orange Red. |
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April, May, |
12 x 18 |
38-51 x 16 |
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August, September, |
48 x 36 |
20-40 x 4-20 |
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June, July, |
3 x 6 |
72 x 24 |
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June, July |
12 x 12 |
20-40 x 4-20 |
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June, July, August, |
36 x 12 |
September, October |
96-120 x 12-36 |
Yellow rays and dark Brown disc. If it flowered in Sep-Oct, I missed taking their photos |
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April, May, |
48 x 24 |
80 x 48 |
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May, June |
12 x 18 |
80 x 18 |
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July, August |
36 x 24 |
23 x 30 |
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M |
20 x 40 |
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May, June, |
12 x 36 |
Yellow with |
30 x 24 |
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May, June, |
12 x 24 |
32 x 40 |
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P |
18 x 12 |
Cream. |
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June, July |
36 x 36 |
26 x 20 |
Pale Pink. |
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May, June |
36 x 36 |
I |
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June, July |
30 x 30 |
72 x 36 |
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May, June |
16 x 16 |
72 x 60 |
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Paeonia |
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23 x 18 |
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May, June |
6 x 4 |
Pinkish-blue |
J, K |
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May, June |
... |
Yellow, Purple, Red, Pink |
32 x 24 |
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May, June |
6 x 5 |
Pink |
40 x 20 |
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May, June |
6 x 3.5 |
Purple |
August, September |
120 x 48 |
Orange-red fades to yellow. |
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May, June |
6 x 3 |
Red |
June, July, August, September |
48 x 32 |
Lemon-Yellow. |
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May, June |
6 x 5 |
White |
July, August, September |
40 x 30 |
Light Scarlet fades to Yellow. |
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May, June |
6 x 3 |
Yellow |
June, July, August |
36 x 24 |
Orange top with Ivory-White bottom. |
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L |
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June, July, |
12 x 6 |
August, September, October, November |
60 x 40 |
White. |
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May, June, |
36 x 24 |
36 x 36 |
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May |
4-8 x 8 |
48 x 48 |
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S |
30 x 18 |
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September |
18 x 18 |
Lychnis coronaria 'Gardener's World' |
24 x 10-12 |
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D |
40 x 24 |
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May |
24-48 x 48 |
60 x 20 |
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36 x 18 |
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M |
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100 x 60 |
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June, July |
88 x 40 |
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June, July |
80 x 48 |
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June, July, August |
55 x 55 |
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June, July, August, September |
24 x 18 |
White. |
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July, August, September |
60 x 20 |
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June, July, August |
36 x 15 |
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N |
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June, July, August, September |
36 x 24 |
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June, July, August |
48 x 36 |
Lilac-Pink. |
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June, July, August, September |
24 x 20 |
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O |
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June, July, August, September |
18 x 24 |
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July, August, September, October |
18 x 18 |
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P |
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July, August, September |
70 x 24 |
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July, August, September |
70 x 24 |
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June, July, August, September |
40 x 30 |
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July, August, September, October |
48 x 48 |
Bright Red. |
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July, August, September, October, November |
18 x 18 |
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June, July, August, September |
50 x 60 |
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Persicaria amplex-icaulis taurus |
July, August, September, October |
40 x 28 |
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July, August, September |
20 x 40 |
White. |
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June, July, August |
80 x 40 |
Pale Yellow. |
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May, June, July, August, September |
36 x 30 |
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July, August |
40 x 24 |
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July, August, September |
30 x 20 |
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July, August, September |
30 x 30 |
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July, August, September |
36 x 24 |
Lilac. |
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July, August, September |
18 x 14 |
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July, August, September |
24 x 16 |
White. |
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July, August, September |
40 x 20 |
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Dear Mr C H Garnons-Williams, Tony Dickerson Horticultural Advisor Above email sent by the RHS on 13 September 2013 - plant label in Mixed Border bed still not changed by 23 November 2013. |
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July, August, September |
30 x 16 |
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July, August, September |
30 x 30 |
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July, August, September |
40 x 32 |
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July, August, September, October |
36 x 24 |
Red. |
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July, August, September |
24 x 24 |
Blue-Purple. |
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July, August, September |
36 x 12 |
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June, July, August, September |
24 x 18 |
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June, July, August |
16 x 12 |
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June, July, August |
16 x 12 |
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Q, R |
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August, September, October |
24 x 18 |
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June, July, August, September |
80 x 36 |
Yellow. |
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S |
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June, July, August |
30 x 24 |
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May, June, July, August, September |
18 x 18 |
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July, August, September, October |
24 x 20 |
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September, October |
20 x 16 |
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August, September |
40 x 20 |
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August, September, October |
12 x 12 |
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August, September, October, November |
18 x 18 |
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August, September |
18 x 18 |
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September, October, November |
24 x 18 |
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June, July, August |
32 x 24 |
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August, September, October |
60 x 32 |
Yellow. |
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June, July, August, September |
18 x 24 |
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June, July, August, September |
20 x 28 |
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August, September, October |
48 x 24 |
Violet-Blue. |
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June, July, August, September |
32 x 18 |
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T |
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June, July, August |
94 x 23 |
Lavender. |
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June, July, August |
59 x 23 |
Purple-Pink. |
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June, July |
48 x 48 |
Sulphur-Yellow. |
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June, July, August |
72 x 36 |
Purple-Pink or Lavender. |
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U, V |
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August, September, October |
60 x 18 |
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June, July, August, September, October |
24 x 16 |
Purple or Magenta. |
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June, July, August, September |
36 x 24 |
Pale Purple/ Lavend-erish Lilac. |
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June, July, August, September |
60 x 24 |
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July, August, September |
60 x 36 |
Pink Lavender/ Lilac. |
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July, August |
40 x 20 |
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July, August, September |
60 x 18 |
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June, July |
42 x 20 |
Lilac/ Pale Blue. |
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July, August, September |
60 x 26 |
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W, XYZ |
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May, June, July |
18 x 14 |
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Ivydene Gardens Herbaceous Perennial Flower Shape Gallery: |
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HERBACEOUS PERENNIAL FLOWER SHAPE AND OTHER DETAILS- |
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Number of Flower Petals |
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Flower Shape - Simple |
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Flower Shape - Elabor-ated |
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Natural Arrange-ments |
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Herbaceous Perennial Name Index The respective flower colour and thumbnail, months of flowering, form, height and width, foliage colour and thumbnail, use and comments are in the relevant index page Evergreen Perennial Name Index |
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UK Peony Index :- |
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Perennials & Ephemerals chapter of Plants for Dry Gardens by Jane Taylor. Published by Frances Lincoln Limited in 1993. ISBN 0-7112-0772-0 for plants that are drought tolerant. |
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Rock |
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Perennials for Ground Covering in Shade and 3 |
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Colour All The Year in My Garden by C.H. Middleton. Published by Ward, Lock & Co. for culture. Perennials The Gardener's Reference by Susan Carter, Carrie Becker and Bob Lilly. Published by Timber Press in 2007 for plants for Special Gardens. It also gives details of species and cultivars for each genus. |
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Herbaceous Perennial Form |
Prostrate or Trailing |
Cushion or Mound-forming |
Spreading or Creeping |
Stemless. Sword-shaped Leaves |
Erect or Upright |
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Herbaceous Perennial Use |
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Back of Border, Alley, and Too Tall for Words Special Garden |
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Herbaceous Perennial in Soil |
Clay + |
Peat + |
Any + |
+ Herbac-eous Perennials in Pages in Plants |
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Peony Use |