Viscaria Coeli Rosa (_the Rose of Heaven_).--Sow in April, or on a
warm, dry, sheltered spot in September. Other varieties of Viscaria
are graceful and effective in beds, masses, or lines, and only require
the usual care bestowed upon hardy annuals. The flowers are produced
in June and July. Height, 1 ft.
Vitis Heterophylla.--These vines are hardy, and will grow in any
rich soil. They are propagated by cuttings, and also by layers. V.
Purpureus has purple leaves, which are very effective. V. Coignettae,
or the Chinese Vine, has very noble foliage.
W
Wahlenbergia.--The hardy perennial kinds thrive best in pots, the soil
in which should be kept moist. The annuals, which are raised on a
hotbed in March, may be planted out in May in a warm situation.
Waitzia.--Very beautiful half-hardy annuals, but more suitable for the
greenhouse than the open flower-bed. They require a sandy peat and
leaf-mould, and the pots to be well drained, as too much water is as
destructive to them as too little. They may be had in flower from May
to August by making two sowings, one in September and the other in
February, and keeping them in the greenhouse. When large enough to
handle, pot off into 3-in. pots, putting two plants in each pot close
to the sides, and shift them into larger ones when they have made
sufficient growth. Place them in a dry and airy situation and near the
glass. They are unable to stand the least frost, therefore, if they
are planted out, it should not be done before the beginning of June.
Height, 11/2 ft.
Waldsteina Fragarioides.--A hardy and pretty trailing rock plant, with
deep green foliage. From March to May it bears yellow Strawberry-like
flowers. Any soil suits it, and it may be increased by seed or
division. Height, 6 in.
Wall-flower (_Cheiranthus_).--These favourite hardy perennials prefer
a rich, light, sandy soil, and a dry situation. The seed may be sown
where it is intended for them to bloom either in autumn or spring.
Thin out to 2 ft. apart. They may also be increased by shoots torn
from the stems of old plants. As well as flowering early in spring,
they often bloom in the autumn. Height, 1-1/2 ft.
Walnuts.--The Nuts for raising young trees may be planted at any time
between October and the end of February, 3 in. deep and 1-1/2 ft.
apart. Train to a single stem 8 to 10 ft. high, removing all the side
branches as soon as they make an appearance. The following year they
may be planted in their permanent position, which should be high,
yet sheltered from frost. Two of the best tall-growing varieties are
Thin-shelled and Noyer à Bijou. The Dwarf Prolific makes a good bush
tree.