- Perennials that may require division every
10 years or more
Aconitum napellus*
Actaea racemosa*†
Anemone ×hybrida*
Anemone pulsatilla
Aquilegia hybrids
Aruncus dioicus*†
Asclepias tuberosa*†
Baptisia australis*
Crambe cordifolia
Dictamnus albus*
Eryngium*†
Euphorbia
epithymoides
Gentiana andrewsii
Gillenia trifoliata*†
Gypsophila
paniculata*†
Hakonechloa macra
‘Aureola’
Helleborus ×hybridus
Hibiscus moscheutos
Hosta
Iris spuria*
Kirengeshoma
palmata
Liatris punctataMolinia caerulea
‘Skyracer’
Oenothera
macrocarpa*†
Paeonia hybrids*
Perovskia
atriplicifolia
Platycodon
grandiflorus*†
Podophyllum, Asian
types*Polemonium
caeruleum
Rheum
Silphium laciniatum†
Silphium
terebinthinaceum†
Sporobolus
heterolepis
Stylophorum
diphyllum
Thermopsis villosa**resents disturbance
†tough woody or thonglike roots or taprootAsclepias tuberosa