Dictyosperma. See [Areca].
Dicyrta. See [Achimenes].
Didymocarpus. Gesneraceæ.
Cuttings, which are obtained from young shoots when commencing growth, and placed in sandy soil, in heat. Also by seeds.
Didymosperma. See [Areca].
Dieffenbachia. See [Caladium].
Diervilla, Weigela. Caprifoliaceæ.
Suckers. Cuttings may be made in spring, summer or autumn. Hardened green cuttings, handled under a frame in summer, are extensively used by nurserymen. (See [page 58].) They are sometimes grown from cuttings in winter from forced plants. Hard-wood cuttings, made in winter and planted in spring like the grape, succeed well.
Digitalis (Foxglove). Scrophularineæ.
Seeds, sown in spring, either in-doors or in the open. The common foxglove (D. purpurea) often self-sows itself.