If your garden floods, clearing the water is likely only part of the job. The other part is making the garden itself better able to cope, and designing it so water is stored, drained or moved in a way that reduces the risk of damage.
That comes down to two things: choosing plants that suit damp or seasonally wet ground, and understanding why the water is collecting in the first place.
Flooding and waterlogging are related, but they are not quite the same. Flooding is water covering the surface of the garden, often after intense rainfall, an overflowing drain or water arriving from elsewhere. Waterlogging is when the soil remains saturated and there is too little air around the roots. The right response depends on which problem you have, and many gardens have a combination of both.
This guide covers planting, garden design, drainage and where a water pump may fit. If your garden is flooded right now and you need to remove the water, start with our companion guide on what to do with a flooded garden and how to clear the water, then come back here to consider how to make it more resilient.
Quick answer: In a flood-prone garden, choose plants that tolerate damp or seasonally wet soil, such as astilbe, hosta, Siberian iris, primula, meadowsweet and marsh marigold, and keep drought-loving plants such as lavender, rosemary and thyme in raised beds or containers. Raised planting, soil improvement, rain gardens and permeable surfaces can all help. Where water repeatedly collects in a defined low point and gravity drainage is not practical, a channel, sump and automatic pump may be appropriate, but only where there is a suitable and lawful place for the water to go.
Why plant choice matters in a wet garden
Plant roots need both water and oxygen. When soil remains saturated, water fills the spaces that would normally contain air, root function reduces and the risk of decay increases. A short-lived flood after a downpour may cause little lasting harm to established plants, but prolonged or repeated waterlogging is much more damaging.
There is a useful general pattern. Plants adapted to consistently moist ground are more likely to cope with occasional wet periods, while plants from dry or Mediterranean conditions usually struggle first. Even so, no plant list can guarantee success. Soil type, temperature, depth and duration of flooding, light levels and the time of year all affect how a plant responds.
The plants below are better described as suitable for damp, moisture-retentive or seasonally wet ground, rather than truly flood-proof. Few ordinary garden plants will tolerate long periods standing in water.
Trees for damp or occasionally wet ground
Trees need particular care because their eventual size, root spread and distance from buildings, drains and boundaries matter as much as their tolerance of wet soil. These examples cope better than many with damp or heavy ground, but they are not suitable for permanent standing water.
| Tree | Botanical name | Notes |
|---|---|---|
| River birch | Betula nigra | Tolerates moist and periodically wet soil, but becomes a substantial tree and needs space |
| Silver birch | Betula pendula | Suitable for moist but generally free-draining soil, rather than prolonged waterlogging |
| Hornbeam | Carpinus betulus | Copes well with heavy, moisture-retentive ground and can also be maintained as a hedge |
| Rowan | Sorbus aucuparia | Better suited to intermittently damp soil than ground that remains saturated |
Shrubs for damp ground
These shrubs generally prefer moisture-retentive soil and cope better with damp conditions than drought-loving species. Most still need the soil to drain between wet periods.
| Shrub | Botanical name | Notes |
|---|---|---|
| Guelder rose | Viburnum opulus | A native shrub suited to moist soil and useful for wildlife |
| Snowy mespilus | Amelanchier lamarckii | Prefers moist but reasonably well-drained soil and offers spring flowers and autumn colour |
| Sweet pepper bush | Clethra alnifolia | Likes moist, acidic soil and can tolerate wetter conditions than many shrubs |
| Ninebark | Physocarpus opulifolius | Adaptable and generally happy in moist, fertile soil, provided it is not permanently submerged |
Perennials for consistently moist or seasonally wet ground
This is where the choice is widest, and where a damp spot can become a feature rather than a problem. The exact species or cultivar matters, so check the label rather than relying on the common name alone.
| Perennial | Botanical name | Typical position |
|---|---|---|
| Astilbe | Astilbe species and cultivars | Partial shade, or sun where the soil remains reliably moist |
| Kingcup / marsh marigold | Caltha palustris | Sun or partial shade in boggy soil or at a pond margin |
| Sedge | Carex species | Varies by species, so choose one specifically listed for damp or wet soil |
| Water avens | Geum rivale | Sun or partial shade in moist soil |
| Plantain lily | Hosta species and cultivars | Partial or full shade in rich, moisture-retentive soil |
| Siberian iris | Iris sibirica | Sun or light shade in moist soil, including seasonally wet ground |
| Royal fern | Osmunda regalis | Partial shade in consistently moist, neutral to acidic soil |
| Candelabra primula | Primula japonica and related cultivars | Sun or partial shade in moisture-retentive soil |
| Meadowsweet | Filipendula ulmaria | Sun or partial shade in damp soil |
| Rodgersia | Rodgersia species and cultivars | Partial shade in rich soil that does not dry out |
A note on the vigorous classics
You will often see willow, alder, dogwood and elder recommended for wet ground, and there is good reason for that. They can perform very well in damp conditions, but they are not always the best fit for an average domestic garden.
Willow and alder can become large and fast growing. Their roots do not magically seek out sound drains, but they can exploit existing cracks, joints and leaks, so their mature size and distance from structures and services need proper thought. Dogwood and elder are easier to accommodate, but some forms spread, self-seed or need regular pruning to stay within bounds. In a larger garden they can be excellent. In a small garden, choose the exact species and location carefully.
Plants to avoid in a flood-prone garden
Plants adapted to dry conditions are usually the first to struggle in saturated soil. Mediterranean herbs such as thyme, rosemary and lavender, shrubs such as cistus and broom, and drought-tolerant perennials such as sea holly and globe thistle all prefer sharper drainage. Tulips and other bulbs from dry regions can also rot where the soil remains wet.
You may still be able to grow these plants in a flood-prone garden by keeping them in containers, raised beds or a higher part of the site where their roots remain above the saturated zone.
Take particular care with plants near ponds, ditches and watercourses. Some moisture-loving plants are invasive or subject to legal controls. In England and Wales, examples include Chilean rhubarb (Gunnera tinctoria) and Himalayan balsam (Impatiens glandulifera). Common names can be misleading, so check the exact botanical name against the current GOV.UK invasive non-native plant guidance before buying or planting.
Design the garden for water, not against it
Plant choice is only one part of the answer. A few design changes can make a flood-prone garden far more forgiving, but the first step is to understand whether the problem is poor soil drainage, a high water table, an overflowing drainage system or water arriving from outside the property.
What approach fits which problem?
| What you are seeing | What may help |
|---|---|
| Soil stays damp but there is little standing water | Moisture-tolerant planting, soil improvement, raised planting and reduced compaction |
| Shallow water remains on a patio or lawn after a storm | A portable puddle pump may help remove the residual water once there is a suitable discharge point |
| The same low point repeatedly threatens a doorway or light well | A drainage review, potentially followed by a channel drain and Packaged Pump Station - subject to a suitable discharge point. |
| Water arrives from a road, neighbouring land or an overflowing sewer | A wider flood-risk and drainage investigation, rather than planting changes alone |
| There is nowhere obvious for the water to go | A proper engineering review before installing drains or choosing a pump |
Where flooding is persistent or localised: a pumped surface water drain
Planting and passive drainage only go so far. Where water repeatedly collects in one defined location, for instance at a low threshold, sunken patio, light well or the low corner of a garden, a pumped surface water drain may be appropriate.
A channel or gully collects the water, a sump provides temporary storage and an automatic pump lifts it to a discharge point. The important part is the final destination. A drain, ditch, watercourse, sewer or soakaway cannot simply be assumed to be suitable, available or able to accept the flow. The arrangement may require testing, permission or consent, and the water must not be redirected in a way that increases flood risk to a neighbour, highway or another part of the property.
Gravity drainage should normally be considered first. Where pumping is necessary, the design should account for the required flow and pumping head, storage volume, pump controls, access for maintenance, electrical supply, alarms where appropriate, and what happens during a power cut, blockage or pump failure.
We have documented two real installations that show what this can look like in practice. Our sump pump installation for surface water flooding covers a domestic garden where water repeatedly collected and had nowhere to go, while our packaged pump station installed for flood control shows a more permanent packaged arrangement. Together, they explain many of the issues a homeowner or contractor needs to consider, from collecting the water to discharging it safely.
Channel drain and packaged pump station installed for surface water drainage.
Where a portable pump still fits day to day
Alongside a permanent installation, a portable pump can still earn its place. For the shallow standing water left on lawns, patios and other hard surfaces, keeping a puddle pump available can turn a day of bailing into a much quicker pumping exercise. That is the point made in our guide to why every home needs a puddle pump.
A pump moves water from one place to another. It does not make saturated ground or a failed soakaway accept water. Where a soakaway is already full, the water table is high or the receiving drain is surcharged, pumping more water towards it may achieve very little or make the situation worse. Before pumping, identify where the water will be discharged and make sure the route is suitable, lawful and does not create a new risk.
For choosing and using a portable pump, including which type suits shallow water, dirty water or a deeper sump, see our guide on clearing a flooded garden. Always follow the manufacturer's operating and electrical safety instructions.
Planning for a resilient garden
A garden that copes with flooding is usually a mix of the right plants, sensible levels, space to hold water and a reliable way to drain or remove the water that cannot remain. If your garden floods regularly, check your long-term flood risk on GOV.UK, keep a record of when and where water appears, and look for patterns during different types of rainfall.
Moisture-loving plants can still need watering in prolonged dry spells, particularly when newly planted, which our guide to watering in a heatwave covers.
For a clearly defined portable pumping requirement, use our Pump Finder, browse our puddle pumps and sump pumps, or call the team on 0115 987 0358 to discuss the published pump information and product options.
Important: This guide shares general ideas and is not a substitute for site-specific horticultural, drainage or engineering advice. Ground levels, soil conditions, flood sources, flow rates, available storage, discharge routes and the consequences of failure vary from one garden to another.
Flood & Water Pumps is an online water pump retailer. We can explain published product information and help you compare pumps for a clearly defined duty, but we cannot diagnose a site's drainage problem, design a permanent system or confirm that a proposed discharge arrangement is suitable through a telephone call or email alone. A permanent drainage or pumped system may require a proper engineering review, site levels, testing and relevant permissions or consents.
Before selecting any pump mentioned in this article, check the required flow rate, total pumping head, water type, solids-handling capability, minimum operating depth, controls, electrical supply, hose or pipe arrangement, installation requirements and what happens if the pump cannot operate. Suitability remains the responsibility of the purchaser and, where appropriate, their appointed designer or engineer.
Established in 2012, Flood & Water Pumps is a respected, engineer-led UK specialist water pump supplier, providing carefully selected pumps and practical product information for homeowners, contractors and professional users.
Always check a plant's exact species, cultivar and suitability before planting. Soil, aspect, drainage, eventual size and local conditions vary from garden to garden. Confirm uncertain choices with a nursery or horticultural adviser, review the RHS guidance on waterlogging and flooding, and check current government restrictions before planting close to ponds, ditches or watercourses.
