Hovenia. Rhamneæ.
Increased by seeds. Root-cuttings are also used. Ripened cuttings should be placed in sand, under a hand-glass.
Hoya (Honey Plant, Wax Flower). Asclepiadeæ.
For layering, good-sized shoots should have a few of their leaves removed, and should then be put in pots of soil until rooted. The plants may afterwards be grown on, and repotted according to their strength. Cuttings may be taken in spring or later in the year, from shoots of the preceding summer’s growth, and placed in a compost of peat and sand, and plunged in bottom heat in a frame. A slight shade and careful watering will be necessary. H. bella does best when grafted on a stronger growing sort.
Huckleberry. See [Vaccinium].
Humea, Agathomeris, Calomeria. Compositæ.
Sow seeds in light, finely sifted soil, and place in a frame in early summer.
It may be propagated by seeds, or by divisions in spring. Ordinarily, however, the species is increased by hard-wood cuttings of two-bud lengths from the best old shoots, and made in spring. Leave the top bud just above the ground.