The Well-Tended Perennial Garden The Essential Guide to Planting and Pruning Techniques, Third Edition

Pruning is often tailored to
species. ‘Carillon’ yellow
foxglove (Digitalis grandiflora
‘Carillon’) can be deadheaded to
basal foliage for decent
rebloom. Mountain bluet
(Centaurea montana) is first
deadheaded to lateral flower
buds for prolonged bloom, then
cut down to basal foliage for
repeat flowering. Shown with
Allium ‘Firmament’ and
California poppies.