Knotweed
Persicaria affinis
Photo by CandideUK (All rights reserved)
Partial Shade
Moderate watering
Frost Hardy
H5
RHS hardiness
-15°C
Minimum temperature
Expected size
Height | Spread | |
|---|---|---|
35cm | Max | 60cm |
20cm | Min | 40cm |
Flowering
-
spring
-
summer
-
autumn
-
winter
Knotweed Overview
This species is a low growing mat-forming perennial which will grow to about 25cm. The leaves are elliptic to oblanceolate 3-10cm and basal, they are dark green turning bronze-red in the autumn. The flowers are borne in dense upright spikes of pink-red blooms in late summer to medium autumn.
How to propagate Knotweed
Division
Divide clumps in autumn or spring.
Other uses of Knotweed
Ground cover, walls, rock garden, borders