Part 46

Viburnum Opulus(Guelder Rose, or Snowball Tree).--A very elegant and hardy deciduous shrub, which will grow in any soil, and may be increased by layers, or by cuttings planted in the shade under glass. It blooms in June. Height, 12 ft.

Viburnum Tinus (Laurestinus).--This well-known and much-admired evergreen shrub produces masses of white flowers through the winter months, at which season it is especially ornamental. It is generally propagated by layers, but where a number of the plants are required they may be obtained from autumn cuttings planted in the shade and covered with a hand-glass. Height, 5 ft.

Vicia Pyrenaica.--A hardy and good perennial for rock-work, having compact tufts of green growth and producing deep crimson flowers in May and June. It will grow in any soil, and is of easy culture. It is increased by seed, also by division of the roots. Height, 1 ft.

Vinca (Periwinkle).--Many of these are variegated and very showy as rock-work plants, and will grow in any moist soil, enjoying a shady situation. They may be raised from seed sown early in spring in a warm situation, or may be increased by runners, which strike root at the joints like the Strawberry. They may be planted under the shade of trees. Many choice greenhouse evergreens bearing fine circular flowers and shining foliage are also included under the name of Vinca. Height, 2 ft.

Vines.--See "Grapes."

Violas.--The hardy perennials are suitable for the front of flower borders or rock-work, but the smaller species succeed best when grown in pots in a mixture of loam, peat, and sand. The herbaceous kinds are increased by seed or division of the roots, the shrubby varieties by cuttings planted under glass, and the annuals by seed sown in the open in spring. Height, 3 in. to 6 in.

Violets.--Plant the runners or off-sets in May in loam and leaf-mould, choosing a damp, shady situation. Russian and Neapolitan Violets may be made to flower throughout the winter and early spring by placing them in a stove or warm pit. Dog-toothed Violets will grow in any light soil. Autumn is the best time to plant them, and 1 in. of silver sand round the roots prevents decay; they are hardy and early, but will not bloom unless planted 9 in. deep. White Violets like a chalky soil. One of the best manures for Violets is the ash from bonfires. They may be multiplied to any extent by pegging down the side-shoots in April. The common Violet flowers in March and April. Height, 6 in.

Virgilia.--For the most part greenhouse shrubs, requiring to be grown in a compost of loam, peat, and sand. Young cuttings planted in sandy loam and covered with glass will strike. The hardy kinds, such as V. Lutea, grow in any light soil, and are increased by laying down shoots in autumn or spring. July is the month in which they flower. Height, from 2 ft. to 12 ft.

Virginian Creeper (Ampelopsis Hederacea).--May be propagated by layers or cuttings, and will grow in any common garden soil. The plant is also known as the Five-leaved Ivy, is a rapid grower, and a favourite for covering unsightly walls.

Virginian Stock.--This pretty little hardy annual is readily raised from seed sown on a border in autumn or spring. It is not particular as to soil. Height, 9 in.

Virgin's Bower.--See "Clematis."

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.

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.

Wand Plant.--See "Galax."

Wasps.--To destroy Wasps rinse a large bottle with spirits of turpentine, and thrust the neck into the principal entrance to their nest, stopping up all the other holes to prevent their escape. In a few days the nest may be dug up. The fumes of the spirit first stupefies and eventually destroys the insects.

Water-cress.--Sow in prepared places, during spring, in sluggish brooks and moist situations; or it may be grown on a shady border if kept moist by frequent waterings. It may also be grown in a frame in September from cuttings placed 6 in. apart, sprinkling them daily, but keeping the frame closed for two or three weeks, then watering once a week. Give all the air possible in fine weather, but cover the frame with mats during frosts. It is best when grown quickly.

Watsonia.--Plant the bulbs during January in sandy loam with a little peat. They flower in April. Height, 1-1/2 ft.

Weeds in Paths.--These may be destroyed by strong brine, applied when hot. Or mix 1/2 lb. of oil of vitriol with 6 gallons of water, and apply, taking care not to get the vitriol on the hands or clothes.

Weigelia.--Free-flowering, hardy, deciduous shrubs, the flowers being produced in profusion along the shoots in April, and varying in colour from white to deep crimson. The plants will grow in any soil, and require no special culture. All the varieties force well, and may be increased by cuttings. Height, 6 ft.

White Scale.--See "Scale."

Whitlavia.--A hardy annual, needing no special treatment. It may be sown in autumn, and protected during winter in a frame, or it may be raised in spring in the open ground, where it will bloom in June. Height, 2 ft.

Whortleberry.--See "Vaccineum."

Wigandia Caraccasana.--A stove deciduous shrub which thrives best in a mixture of loam and peat. Cuttings in sand will strike if placed under glass and in heat. It flowers in April. Height, 10 ft.