Aesculus

Chaenomeles

Clematis

Clethra

Cotoneaster

Crataegus

Daphne

Dasiphora

Enkianthus

Hibiscus

Hydrangea

Lagerstroemia

Leycesteria

Lonicera

Magnolia

Rhododendron (defines evaluations)

Ribes

Rosa

Syringa

Viburnum

Weigela