Clay soils: plants for

Without some intervention, clay soils can be like concrete in summer and a sticky mess in winter. Any effort to improve the texture of clay will be rewarded with strong plant growth. This soil is rich in nutrients and will happily accommodate a considerable range of plants.

Save to My scrapbook
Hydrangea paniculata 'Floribunda' is a good choice for clay soils. Image: RHS/John Trenholm


When planting on heavy clay soil it is always advisable to attempt some improvement of the soil, by working in organic matter. Mulching the surface of the soil will also help improve the texture.

  • One of these materials is long manure (manure that still has a proportion of visible straw remaining) or composted bark
  • Finer grades of composted bark, leafmould, leaf litter, garden compost or mushroom compost will still have a beneficial effect, but to a lesser extent
  • Dig coarse grit into the soil profile is often recommended, but the quantity required to have a beneficial effect makes this an impractical solution on all but the smallest scale
  • When planting on clay soils, the bottom of the planting hole should be broken up before planting and the sides of the hole broken down using a garden fork. If not loosened, a sump may be formed in that water can collect, resulting in probable plant death from waterlogging
  • It is a good idea to delay planting on heavy clay soils until late winter or early spring, when there is less time for dormant roots to become waterlogged and cold
  • Mulch the base of the plants in spring with a 7.5cm (3in) layer of well-rotted organic matter which will help to retain moisture and suppress weed growth. Leave a gap of 7.5cm (3in) between the stems and the mulch to decrease the chance of rots developing at the base. Continually maintaining this mulch will gradually improve the soil profile
  • Freezing and thawing over winter of ground dug in October aids soil breakdown and helps to form spring seedbeds

Suitable plants


Acer japonicum, A. palmatum (Japanese maple)
Amelanchier lamarckii AGM
Betula (birch)
Crataegus (hawthorn)
Laburnum anagyroides, L. × watereri 'Vossii' AGM
Liquidambar styraciflua
Malus (crab apple)
Pyrus salicifolia 'Pendula' AGM (weeping pear)


Abies koreana
Araucaria araucana
Chamaecyparis lawsoniana, C. obtusa, C. pisifera
Ginkgo biloba AGM
Juniperus chinensis, J. × pfitzeriana
Picea abies, P. glauca, P. omorika AGM, P. orientalis AGM, P. pungens
Pseudotsuga menziesii
Taxodium distichum AGM
Thuja plicata
Tsuga candensis, T. heterophylla AGM


Berberis (evergreen and deciduous)
Cotoneaster (evergreen and deciduous)
Escallonia (evergreen)
Viburnum (deciduous and evergreen)

Ground-covering plants

Euonymus fortunei
Gaultheria procumbens AGM, G. shallon, G. × wisleyensis 'Wisley Pearl'
Hypericum calycinum
Juniperus communis, J. rigida subsp. conferta 'Blue Pacific'J. horizontalis 'Wilsonii' 
Lamium galeobdolon
Persicaria affinis, P. bistorta, P. vacciniifolia AGM
Vinca major, V. minor

Climbers and wall shrubs

Chaenomeles speciosa 'Moerloosei' AGM (pink) and 'Nivalis' (white)
Cotoneaster horizontalis AGM, C. lacteus AGM
Forsythia suspensa AGM
Escallonia 'C.F. Ball', E. 'Edinensis' AGM
Garrya elliptica 'James Roof' AGM
Hydrangea anomala subsp. petiolaris
Kerria japonica
Lonicera japonicaL. periclymenum

Herbaceous perennials

Alchemilla mollis
Anemone hupehensis var. japonica, A× hybrida
Aster novae-angliae, A. novi-belgii
Sedum spectabile AGM


RHS Find a Plant

Join the RHS today and get 12 months for the price of 9

Join now

Gardeners' calendar

Find out what to do this month with our gardeners' calendar

Advice from the RHS

You may also like

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.