Heliconia. Scitamineæ.
May be increased by seeds, but the best method is by division of the root stock in spring when growth commences. Separate pieces may be placed in pots, and grown in a moist stove temperature, repotting when necessary; or they may be planted out in the stove, if desired.
Heliotropium (Heliotrope). Boragineæ.
Seeds. The common practice is to use cuttings. These can be taken at almost any season, if good growing shoots are to be had. They start readily in sand or soil on a cutting bench, or under a frame. Plants for bedding are struck in late winter from stocks which are in a vigorous condition.
Helipterum, including Astelma, Rhodanthe. Compositæ.
Seeds may be sown in early spring, under cover.
Helleborus (Black Hellebore, Christmas Rose). Ranunculaceæ.
Seeds may be sown as soon as ripe. Strong and healthy root divisions are also employed.
Helonias. Liliaceæ.
Propagation is effected by seeds, and slowly by root divisions.