Fatsia (Aralia Sieboldii).—This is usually cut by frost, but it stands a cutting back in spring, when new growth is soon made which will flower late in the following autumn.
Fothergilla.—Requires no pruning.
Garrya elliptica.—This always flowers on the previous year's wood. Need only be thinned to ripen the new growth.
Genista.—G. tinctoria flowers on the young wood, and should be cut back every spring. The other species of Genista should not be pruned, except to keep them in shape.
Halesia.—These are small trees or large shrubs, and should not be shortened back, but are improved if the growths are kept thinned out, which should be done after the flowers are past.
Halimodendron.—Requires no pruning.
Hamamelis.—Thin out regularly, as they are very apt to get thick and make weakly growths.
Hedysarum multijugum.—This flowers on the young wood, and should be cut back lightly each spring. The growths can also be pegged down to improve the plant, which is apt to get straggling.
Helianthemum.—Cut away all dead flowers and seed-pods after blooming.
Hibiscus.—Thin out in winter, but only shorten the longest shoots.