Flowers. Photo from Chris Garnons-Williams on 29 July 2013. |
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Plant Name |
Persicaria alpina (Persicaria polymorpha, |
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Common Name |
Alpine Knotweed |
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Soil |
Chalk, Loam or Sand |
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Sun Aspect |
Full Sun or Part Shade |
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Soil Moisture |
Dry to Moist and Well-drained |
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Plant Type |
Herbaceous Perennial |
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Height x Spread in inches (cms) |
70 x 24 (175 x 60) |
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Foliage |
Large, pointed, Dark Green |
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Flower Shape, Natural Arrangement, Number of Petals and Flower Colour in Month(s). Seed |
Large plumes of Creamy-White flowers in July-September |
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Comment |
Erect Form. Pruning Group 14. "A large, well-branched perennial herb, rarely grown in gardens but naturalised on river shingle, roadside verges and waste ground in a few localities. Reproduction is by rhizomatous spread. The species was introduced into cultivation in 1816 and first reported from the wild in 1909, when it was discovered on the coast between Innellan and Dunoon (Main Argyll)." from Online Atlas of the British & Irish Flora. "Forms a tall columnar plant, composed of strong stems handsomely clothed in large pointed green leaves, topped, in midsummer with widely branched heads of small creamy-white flowers. Makes an important statement above lower plants, such as hostas, dicentras, ferns and ajugas. By Sept. the flower heads become stained bronze-pink and green. For deep rich soil, sun or part shade, sheltered from wind. 180 cm." from The Beth Chatto Gardens. Available from The Beth Chatto Gardens in the UK. Seeds available from B&T World Seeds. |
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Companions |
... |
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Winter Form from Mixed Borders at RHS Wisley. Photo from Chris Garnons-Williams on 4 March 2013. |
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Spring Form in middle behind green pea-netting plant support system 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 Chris Garnons-Williams on 29 July 2013. |
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Summer Foliage from Mixed Borders at RHS Wisley. Photo from Chris Garnons-Williams on 29 July 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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Flower from Mixed Borders at RHS Wisley. |
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Flower and Bud Group from Mixed Borders at RHS Wisley. |
Flower Bud 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 |