, 1 ft. to 3 ft.

H

Habrothamnus.--These beautiful evergreen shrubs require greenhouse
culture, and to be grown in sandy loam and leaf-mould. The majority of
them flower in spring. Height, 4 ft. to 6 ft.

Halesia Tetraptera (_Snowdrop Tree_).--This elegant shrub will grow in
any soil, and may be propagated by cuttings of the roots or by layers.
The pendent white flowers are produced close to the branches in June.
Height, 8 ft.

Hamamelis (_Witch Hazel_).--An ornamental shrub which will grow in
ordinary soil, but thrives best in a sandy one. It is increased by
layers. May is its season for flowering. Height, 12 ft. to 15 ft. H.
Arborea is a curious small tree, producing brownish-yellow flowers in
mid-winter.

Harpalium Rigidum.--A hardy perennial, producing very fine yellow
flowers in the autumn. It will grow in any good garden soil, and may
be propagated by seed sown in early autumn, or by division of the
roots. Height, 3 ft.

Hawkweed.--_See_ "Crepis" _and_ "Hieracium."

Heartsease.--_See_ "Pansies."

Heaths, Greenhouse.--For their successful growth Heaths require a
well-drained soil, composed of three parts finely pulverised peat and
one part silver sand, free ventilation, and a careful supply of water,
so that the soil is always damp. If they suffer a check they are
hard to bring round, especially the hard-wooded kinds. Some of the
soft-wooded Heaths, such as the H. Hyemalis, are easier of management.
After they have flowered they may be cut hard back, re-potted, and
supplied with liquid manure. The stout shoots thus obtained will bloom
the following season. (_See also_ "Ericas.")

Hedera.--_See_ "Ivy."

Hedychium Gardnerianum.--A hothouse herbaceous plant, delighting in a
rich, light soil, plenty of room in the pots for the roots, and a good
amount of sunshine. In the spring a top-dressing of rich manure and
soot should be given. From the time the leaves begin to expand,
and all through its growing stage, it needs plenty water, and an
occasional application of liquid manure. The foliage should not be cut
off when it dies, but allowed to remain on all the winter. While the
plant is dormant keep it rather dry and quite free from frost. It
may be increased by dividing the roots, but it blooms best when
undisturbed. July is its flowering month. Height, 6 ft.

Hedysarum.--Hardy perennials, requiring a light, rich soil, or loam
and peat. They may be raised from seed, or increased by dividing the
roots