Bistort (Persicaria bistorta 'Superba') is the one plant we stock that the RHS and PFAF list as suited to moist to wet soil. Our range for wet ground is small at the moment, and we would rather say so than pad the page. Free tracked delivery to Ireland and 24 more EU countries.
Which plants do we stock for wet and damp soil?
Just one so far: bistort, Persicaria bistorta 'Superba', which the RHS Plant Finder and PFAF list for moist to wet soil. If your ground stays wet, this is a short list, and it is worth knowing that before you order.
| Plant | RHS hardiness | Soil | Moisture | Good to know |
|---|---|---|---|---|
| Bistort (Persicaria bistorta 'Superba') | H7 (to about -20 °C) | Sandy, loam or clay; acid to alkaline | Moist to wet | Suits a range of soil types and pH, so it is not fussy about the ground itself |
Hardiness and soil ranges come from the RHS Plant Finder and PFAF. The temperature shown is the warm end of the RHS band, so it errs on the cautious side.
Is your soil wet all year, or only in winter?
The RHS makes a useful distinction. Soil that is wet all year round is hard to manage. Soil that is wet in winter and dry in summer is typical of clay, and needs plants that cope with both. To test, the RHS suggests digging a pit about 60 cm deep, covering it overnight and checking whether water collects. If it does, you have a high water table. If it stays dry, fill it with water and leave it covered for 24 hours. Water that remains means poor drainage.
Working with wet ground
- Add organic matter: the RHS suggests about one barrow load per square metre on poorly drained clay, because it helps break the clay into smaller crumbs. Adding sand or grit is seldom effective.
- Raise the planting: shallow mounds or raised beds help trees and shrubs avoid waterlogging.
- Accept the wet: with a high water table, the RHS suggests either a bog garden or installing drainage.
- Timing: in Ireland, plant in autumn (October to November) or in spring (February to April).
What this list does and does not mean
A plant that tolerates wet soil is not the same as one that thrives in it. The RHS notes that few plants survive long spells of waterlogging, especially in summer. Our data comes from the RHS Plant Finder and PFAF, checked October 2026, and we list a plant here only where a source names it for moist or wet ground. That is why the list is short. For related help, see our clay soil plants, exposed site plants and coastal garden plants.
Frequently asked questions
Why are there so few plants here?
We include a plant only when a published source names it for moist or wet soil. At the moment that is one plant, and we will add more as our range grows.
Will bistort grow in clay?
The sources list clay among its soils, along with sandy and loam, across acid to alkaline pH. It is rated moist to wet.
Is bistort hardy in Ireland?
The RHS rates it H7, the hardiest band, which covers temperatures to about -20 °C. That is well beyond a normal Irish winter.
My soil is wet in winter but dry in summer. Is this the right page?
Possibly not. That pattern is typical of clay, so start with our plants for clay soil. Bistort is listed for clay as well.
What if my garden is wet and windy?
Look at our exposed site plants and coastal garden plants for wind-tolerant options, and our guide to choosing and planting a hedge in Ireland.