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Low to Medium Perennials for Heavy Clay Soil

Heavy clay soils are often wet and sticky in winter, but hard and lumpy in dry summers.  When amended with organic matter and mulched, they can also by very fertile and amenable for a wide range of perennials.  None of the following will grow much above 36in (90cm) and are suited to small gardens or the front of larger borders and beds. 

Ajuga reptan ‘Multicolor’

Aquilegia vulgaris ‘Nora Barlow’

Aster frikartii ‘Monch’

Bergenia crassifolia

Campanula takesimana

Hemerocallis ‘Stella de Oro’

Hosta ‘June’

Lamium orvala

Paeonia ‘Laura Dessert’

Prunella grandiflora ‘Loveliness’   Self-Heal

Ranunculus aconitifolius ‘Flore Pleno’

Rudbeckia fulgida var. sullivantii

  Medium to Tall Perennials for Heavy Clay Soil

Many of the more robust perennials are tolerant of heavy clay soils.  Some have densely fibrous rootstocks, others are deep-rooted, allowing them to survive as long as their site is not waterlogged.  The following perennials, all 3-6ft (1-2m) tall, will do even better if drainage can be improved by adding organic matter, like compost, to the soil. 

Aconitum cammarum ‘Bicolor’

Anemone hybrida

Aruncus dioicus

Aster novae-angliae

Campanula lactiflora

Centaurea macrocephala

Cimicifuga simplex ‘Scimitar’

Delphinium ‘Emily Hawkins’

Eupatorium purpureum

Helenium autumnale

Helianthus ‘Capenoch Star’, salicifolius

Heliopsis helianthoides, scabra

Persicaria amplexicaulis ‘Firetail’

Rodgersia aesculifolia

Solidago
 

 

 

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