Chapter 10

Hotbeds, to Make.--Take dead leaves and stable-straw, with the dung, in the proportion of two double loads for a three-light frame. Turn it over four or five times during a fortnight, watering it if it is dry. Then mark out the bed, allowing 1 ft. or more each way than the size of the frame. Shake the compost well up, and afterwards beat it down equally with the fork. Place the frame on the bed, leaving the lights off for four or five days to allow the rank steam to escape. Keep a thermometer in the frame, and as soon as the temperature falls below 70 degrees apply a lining of fresh dung to the front and one side of the bed, and when this again declines, add another lining to the back and other side, and so on from time to time as occasion requires. The mats used for covering the frames in frosty weather should be made to fit the top, and not hang over the sides.

Houseleek.--_See_ "Sempervivum."

Houstonia Coerulea.--These hardy little evergreens are more generally known as Bluets. They make charming ornaments for rock-work, planted between large stones, but in this position they need protection from severe frosts. When planted in pots and placed in a cold frame they show to most advantage. A mixture of leaf-mould and sand, and a moist but well-drained situation is what they delight in. They bloom continuously from April to July. Height, 3 in.

Hovea Celsi.--A greenhouse shrub, which is evergreen and elegant when in flower in June. A sandy loam and peat soil is most suitable, and it may be increased by cuttings planted in sand under a hand-glass. Height, 3 ft.

Humea.--A remarkably handsome and graceful plant, the leaves of which when slightly bruised yield a strong odour. It is equally suitable for the centre of beds or large borders, and placed in pots on terraces or the lawn it is very effective. The seed should be raised on a gentle hotbed, then potted off and kept in the greenhouse till the second year, when it may be turned out into a warm situation. It generally succeeds better in such a position than in the greenhouse. Flowers in July. Height, 6 ft. to 8 ft.

Humulus Japonicus.--(_Japanese Hop_).--A hardy annual Hop of rapid growth, the leaves of which are splashed with white. Useful for covering arbours, verandahs, etc. A deep, loamy soil suits it best. Increased by seed sown in gentle heat in February, and gradually hardened off. Flowers in July. Height, 20 ft.

Hutchinsia Alpina.--This small alpine creeper is a profuse bloomer, its glistening white flowers being produced at all seasons. It grows in moist vegetable mould, and bears transplanting at any season. Care, however, is required to prevent its roots over-running and choking other things. Height, 2 in.

Hyacinths.--May be grown in pots, in glasses, or in beds and borders. The soil should be rich and light. Good loam mixed with old manure and a little leaf-mould and sand suits them very well. If intended to be grown in pots the best time to begin potting is early in September, putting more in at intervals of two or three weeks until the end of December. One bulb is sufficient for a 5-in. or 6-in. pot, or three may be placed in an 8-in. pot. The soil under the bulb should not be pressed down. The top of the bulb should be just above the surface. Place the pots on a bed of ashes in a cold frame, put a small inverted pot over the top of the bulb, and cover the whole with cocoa-nut fibre or cinder-ashes to the depth of about 4 in. In about a month roots will have formed with about 1 in. of top growth. The plants may then be taken out, gradually exposed to the light, and finally removed to the conservatory or sunny window. The doubles do best in pots.

For growing in glasses select the firmest and best-shaped bulbs. Those with single blossoms are preferable, as they are of stronger constitution than the doubles. Fill the glasses with pure pond or rain water, so that the bulbs just escape touching it, and put a piece of charcoal in each glass, and change the water when it becomes offensive, taking care that the temperature is not below that which is poured away. Stand the glasses in a cool, dark place for three or four weeks until the roots have made considerable progress, then gradually inure to the full light. September is a good time to start the growth.

When planted in beds or borders, place the bulbs about 4 in. deep and 6 in. apart, putting a little silver sand below each one. This may be done at any time from October till frost sets in. They succeed fairly well in any good garden soil, but give greatest satisfaction when the ground is rich and light.

Hyacinthus (_Muscari_).--A very hardy race of spring-flowering bulbs. Though the varieties are very dissimilar in appearance, they all produce a good effect, especially when planted in good large clumps. Plant from September to December. A sandy soil suits them best. The following are well-known varieties:--_BOTRYOIDES_ (_Grape Hyacinth_).--Very pretty and hardy, bearing fine spikes of deep, rich blue flowers in compact clusters on a stem 6 to 9 in. high. Sweet-scented, and blooms about May. The _Alba_, or white, variety is also sweet-scented.

Hyacinthus--_continued_.

_CANDICANS_ (_Galtonia_).--The white Cape Hyacinth, or Spire Lily. A hardy, summer-flowering, bulbous plant 3 ft. to 4 ft. in height, gracefully surmounted with from twenty to fifty pendent, bell-shaped snow-white flowers. Thrives in any position and equally suitable for indoor or outdoor decoration.

_MOSCHATUS_ (_Musk Hyacinth_).--Bears very fragrant purplish flowers.

_PLVMOSUM_ (_Feather Hyacinth_).--A fine, hardy, dwarf plant suitable for any soil. Its massive sprays of fine blue flowers, arranged in curious clusters, 5 to 6 in. in length, resemble much-branched slender coral.

_RACEMOSUM_ (_Starch Hyacinth_).--Rich dark-blue or reddish-purple flowers. Very free-flowering and fine for massing. It is similar to the Cape Hyacinth, but flowers in denser spikes.

Hydrangea.--This shrub delights in a moist, sheltered position and rich soil. It may be increased at any time from cuttings of the young side-shoots, 2 or 3 in. long, under glass, in sandy soil. The old stems will also strike if planted in a sheltered situation. The plants should be cut back when they have done flowering, and protected from frost; or they may be cut down to the root and covered with manure. They are well suited for the front of shrubberies, and also make fine plants for pot cultivation. The flowers are produced in June and July. Height, 3 ft.

Hymenanthera Crassifolia.--Ornamental evergreen shrubs, thriving best in a compost of loam and peat. They are increased by cuttings planted in sand and subjected to a little heat. Height, 6 ft.

Hymenoxys.--Pretty little hardy annuals that may be easily raised from seed sown early in March in any garden soil. They bloom in June. Height, 1 ft.

Hypericum (_St. John's Wort_).--Favourite dwarf shrubs. Any soil suits the hardy kinds, but they prefer shade and moisture. These may be increased by seed or division. The greenhouse varieties thrive best in a mixture of loam and peat. Young cuttings placed in sand under glass will strike. July is their flowering season. Height, 1-1/2 ft. to 2 ft.

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Iberis.--_See_ "Candytuft."

Ice Plants.--_See_ "Mesembryanthemum."

Ilex.--_See_ "Holly."

Impatiens Sultani.--Half-hardy perennials. May be raised from seed sown early in spring on a hotbed, or later on in a shady spot in the open border; greenhouse culture, however, is more suitable. They bloom in August. Height, 11/2 ft.

Incarvilleas.--Ornamental hardy herbaceous plants, of easy culture. They are suitable for the border or the rockery, and will grow in any soil if not too dry and exposed. The tuberous roots may be planted at any time in autumn, 4 in. deep. I. Delavayi makes a fine solitary or lawn plant, its leaves being from 1 to 3 ft. long; the soft rose-pink, Mimulus-shaped flowers, which are carried on stout stems well above the foliage, appearing in May. Care should be taken not to disturb it in spring, and it is advisable to cover the roots in winter with a pyramid of ashes, which may be carefully removed at the end of April. Incarvilleas may be propagated by seed sown, as soon as it is ripe, in light, well-drained soil, giving the young plants protection in a frame during the first winter, with enough water merely to keep them moist. Height, 2 ft.

Indian Corn.--_See_ "Zea."

Indian Shot.--_See_ "Canna."

India-rubber Plants.--_See_ "Ficus."

Indigofera.--Beautiful evergreen shrubs. I. Australis has elegant, fern-like foliage and racemes of pink or purple Pea-shaped flowers in April. I. Decora Alba bears its white flowers in July. They require a sandy loam or peat soil, and greenhouse culture. Cuttings of the young wood planted in sand under glass will strike. Height, 21/2 ft.

Insects on Plants.--To destroy insects on plants wash the plant with Tobacco-Water (_which see_). Or put 1 oz. of quassia chips in a muslin bag, pour on some boiling water, and make it up to I gallon; dissolve 1 oz. of soft soap, add it to the chips, and stir well. Use it two or three times during spring and early summer.

Inula Royleana (_Fleabane_).--A hardy perennial which flowers in November. It will grow in any garden soil, and can be increased by seeds, or by division of the roots. Height, 3 ft.

Ionopsidium.--These hardy annuals grow freely in any rich, damp soil; a shady position is indispensable. Height, 1/8 ft.

Ipomoea.--These beautiful climbing plants are very suitable for covering trellis-work, or for the pillars or rafters of the stove-house. The seed is generally sown in April on a hotbed or under glass, and the young plants set out in the border of the house in May in light, rich soil. Success is mainly secured by allowing plenty of root-room. The perennial kinds are increased from cuttings taken from the small side-shoots placed in sand in a brisk bottom-heat. If grown in the open they often shed their seed, and come up year after year with but little attention. They make a good contrast to Canariensis. The Ipomoea Horsfalliae, with its bright scarlet flowers, has a lovely appearance, but must be treated as a stove evergreen. This is propagated by layers, or by grafting on some strong-growing kind. It thrives in loam and peat mixed with a little dung, and flowers in July or August. Height, 6 ft. to 10 ft.

Ipomopsis.--A very beautiful half-hardy biennial, but difficult to cultivate. Some gardeners steep the seed in hot water before sowing it; but the best way seems to be to sow it in July in 3-in. pots in equal parts of sandy peat and loam, ensuring good drainage, and place it in a cold frame, giving it very little water. When the leaves appear, thin out the plants to three or four in each pot. Replace them in the frame for a week or so, then remove them to a light, airy part of the greenhouse for the winter. During this period be careful not to over-water them. In spring shift them into well-drained 4-1/2-in. pots, using the same kind of soil as before, and taking great care not to injure the roots; still give the least possible amount of water. If plenty of light and air be given, they will flower in July or August. Height, 2 ft.

Iresines.--Take cuttings of these greenhouse plants in autumn; insert them thinly in 48-size pots filled with coarse sand, loam, and leaf-mould, and place in a uniform temperature of 60 or 70 degrees. When they have taken root place them near the glass. Height, 1-1/2 ft.

Iris.--The Iris is the orchid of the flower garden; its blossoms are the most rich and varied in colour of hardy plants. For cutting, for vases, table decoration, etc., it is exceedingly useful, as it is very free-flowering, and lasts a long time in water. It thrives in almost any soil, though a sandy one suits it best, and is strikingly effective when planted in clumps. It soon increases if left undisturbed. The English Iris blooms in June and July, bearing large and magnificent flowers ranging in colour from white to deep purple, some being self-colours, while others are prettily marbled. The German Iris is especially suitable for town gardens. The Spanish Iris blooms a fortnight before the English. Its flowers, however, are smaller, and the combinations of colours very different. The Leopard Iris (_Pardanthus Chinensis_)is very showy, its orange-yellow flowers, spotted purple-brown, appearing in June and July. They are quite hardy. The best time for planting them is October or November, selecting a sunny position. Height, 1-1/2 ft.

Isopyrums--Hardy herbaceous plants of great beauty, nearly related to the Thalictrums. They will grow in any ordinary soil, but flourish best in vegetable mould, and in a moist, yet open, situation. They are readily raised from seed, or may be propagated by division of the roots in autumn. They flower in July. Height, 1 ft. to 1-1/2 ft.

Ivy (_Hedera_).--A deep, rich soil suits the common Ivy; the more tender kinds require a lighter mould. To increase them, plant slips in a north border in sandy soil. Keep them moist through the autumn, and plant them out when well rooted. The following are the principal choice sorts:--Aurea Spectabilis, palmate-leaved, blotched with yellow; Cavendishii, a slender-growing variety, leaves margined with white, with a bronzy shade on the edge; Conglomerata, crumpled leaves; Elegantissima, slender-growing, with silvery variegated leaves; Irish Gold-Blotch, large leaves, blotched with yellow; Latifolia Maculata, large white-blotched leaves; Lee's Silver, silver variegated; Maderiensis Variegata, leaves broadly marked with white; Marmorata, small leaves blotched and marbled with white; Pupurea, small leaves of a bright green changing to bronzy-purple; Rhomboides Obovata, deep green foliage; Rhomboides Variegata, greyish-green leaves, edged with white; and Silver Queen, a good hardy variety.

Ixias.--Plant out of doors from September to December, in a sunny, sheltered position, in light, rich, sandy soil. For indoor cultivation, plant four bulbs in a 5-in. pot in a compost of loam, leaf-mould, and silver sand. Plunge the pot in ashes in a frame or cold pit, and withhold water until the plants appear. When making free growth remove them to the conservatory or greenhouse, placing them near the glass, and give careful attention to the watering. Ixias are also known under the name of African Corn Lilies.

J

Jacobaea (_Ragwort_).--May be raised from cuttings in the same way as Verbenas, and will grow freely from seeds sown in autumn or spring. It delights in a rich, light soil. The purple Jacobaea is a great favourite of the public. Flowers in August. Height, 1 ft.

Jacob's Ladder.--_See_ "Polemonium."

Jasione Perennis (_Sheep Scabious_).--A hardy perennial which produces a profusion of heads of blue flowers in June, and continues to bloom till August. It enjoys a peat soil, and should have the protection of a frame during the winter. It can be propagated by seeds, cuttings, or division. Height, 1 ft.

Jasminum.--These are favourite plants for training over arbours or trellis-work, and for growing against walls. The hardy kinds will flourish in ordinary soil. The stove and greenhouse sorts should be provided with a mixture of sandy peat and loam. They may all be increased by cuttings of ripened wood planted in a sandy soil under glass. J. Nudifolium produces an abundance of bright flowers after its leaves have fallen, and is very suitable for town gardens. J. Unofficinale is likewise adapted for town, bearing confinement well, and has very sweet flowers. J. Revolutum needs protection in severe weather. They bloom in July. Height, 12 ft.

Job's Tears.--_See_ "Coix Lachryma."

Jonquils.--These are quite hardy, and may be grown in the open in the same manner as Hyacinths. Five or six bulbs in a 5-in. pot make a very pretty bouquet. They are excellent early flowers, and very odoriferous. Plant in autumn, placing sand round the bulbs. Best not disturbed too often. The leaves should not be cut off when withering, but allowed to die down. They bloom in April. Height, 1 ft.

Joss Flower.--_See_ "Chinese Sacred Narcissus."

Juniper (_Juniperus_).--These useful conifers prefer dry chalk or sandy soils, but will thrive in any ground that is not too heavy. J. Japonica, Sabina, and Tamariscifolia do well on steep banks and rock-work. They may be propagated by seeds, grafting, or by cuttings of firm young shoots planted in a sandy compost, kept shaded, and covered with a hand-glass.

K

Kadsura Japonica.--This is a beautiful creeper for a south or west aspect. It thrives best in loam and sandy peat. Cuttings may be struck in sand, placed under a glass, and subjected to heat.

Kale.--_See_ "Borecole."

Kalmia Latifolia.--This hardy, dwarf evergreen shrub is deservedly a great favourite. It produces a wealth of flowers in large clusters. It requires to be grown in peat or good leaf-mould, and needs pure air. It is increased by pegging down the lower branches, which soon become rooted. The flowers are produced from June to August. Height, 2 ft.

Kalosanthes.--Showy greenhouse succulent plants. A light, turfy loam is suitable for them, and they may be increased by placing cuttings of the young shoots in a sandy soil on a slight hotbed in spring. Pinch them back so as to produce a bushy growth, and give support to the heavy heads of bloom. The cuttings should be left for twenty-four hours to dry before they are planted. The plants require very little water, and they flower in July. Height, 6 in. to 1 ft.

Kaulfussia.--Sow this pretty hardy annual in April in the open border, or in March in slight heat. It may also be sown in autumn for early flowering. It will succeed in any light soil, blooming in July. Height, 6 in.

Kennedya Marryattæ.--A greenhouse evergreen twining plant of a very beautiful order, which thrives best in a compost of sandy loam and peat. Cuttings of the young wood planted in sand, and having a bottom-heat, will strike. It produces its flowers in May. Height, 4 ft. Other varieties of Kennedyas range from 2 to 10 ft. They all need to be well drained and not to stand too near the pipes.

Kerria (_Corchorus_).--Beautiful hardy shrubs, which may be grown in any garden soil, and can be propagated by cuttings of the young wood, taken at a joint, and placed under glass. They flower at midsummer. Height, 4 ft.

Koelreuteria Paniculata.--This is an ornamental tree bearing long spikes of yellow flowers in July. It will grow in any soil, but requires a sheltered position, and may be increased by layers or root cuttings. Height, 10 ft.

Kohl Rabi (_Turnip-rooted Cabbage_).--Though mostly grown as a farm crop, this vegetable is strongly recommended for garden cultivation, as it is both productive and nutritious, and is delicious when cooked while still very small and young. Sow in March, and transplant to deeply-dug and liberally manured ground, at a distance of 15 in. from each other.

L

Lachenalia. (_Cape Cowslips_).--Charming greenhouse plants for pot or basket culture. Pot in December in a compost of fibrous loam, leaf-mould, and sand; place as near the glass as possible, and never allow the soil to become dry, but maintain good drainage, and only give a little water till they have produced their second leaves. No more heat is required than will keep out the frost.

Lactuca Sonchifolia. (_Sow Thistle-Leaved Lettuce_).--An ornamental, but not handsome, hardy perennial, with leaves 1 ft. in length and 9 in. in breadth. It is of neat habit and enjoys the sunshine. A deeply-dug, sandy loam suits it, and it may be increased by seed or division of the roots. The flowers are produced from September till frost sets in. Height, 2 ft.

Ladies' Slipper Orchid.--_See_ "Cypripedium."

Lady's Mantle.--_See_ "Alchemilla."

Lagurus Ovatus.--This hardy annual is commonly known as Hare's-Tail Grass. It is distinctly ornamental, producing elegant egg-shaped tufts of a silvery-white hue, and is fine for ornamenting bouquets. Sow in March, and keep the ground moist till the seed germinates. Height, 1 ft.

Lallemantia Canescens.--Bees are very fond of this blue hardy annual, which may readily be grown from seed sown in the spring. Height, 1 ft.

Lamium.--These plants are mostly of a hardy herbaceous description and of little value. They will grow well in any kind of soil, flowering from March to July, according to their varieties, and can be propagated by seed or division. Height, 6 in. to 1 ft.

Lantana.--These dwarf, bushy, half-hardy perennial shrubs bear Verbena-like blossoms. They like a dry and warm situation and rich, light soil. The seed is sown in March to produce summer and autumn blooming plants. If cuttings are placed in sand, in heat, they will take root easily. Height, 1 ft. to 1-1/2 ft.

Lapageria Rosea.--A beautiful climbing plant which bears large rose-coloured flowers in May. It can be grown in any light, rich soil, but a compost of leaf-mould, sand, and peat suits it best. It makes a very desirable greenhouse plant, and can be increased either by cuttings or by division. Lapagerias require partial shade, plenty of water, and good drainage. Height, 10 ft.

Lardizabala Biternata.--This climbing shrub has fine ornamental foliage. It is most suitable for a south or west aspect, where it proves hardy; in other positions protection should be afforded. It will grow in any good soil. May is the month in which it flowers. Height, 20 ft.

Larkspur.--The Stock-flowered Larkspur is of the same habit as the Dutch Rocket, but has longer spikes and larger and more double flowers. The Hyacinth-flowered is an improved strain of the Rocket. Among other of the hardy annual varieties may be mentioned the Candelabrum-formed, the Emperor, and the Ranunculi-flowered. They are charming flowers for beds or mixed borders, and only require the same treatment as ordinary annuals, when they will flower in June. Height, 1 ft. to 2-1/2 ft. For perennial Larkspurs, _see_ "Delphinium."

Lasiandra.--Stove evergreen shrubs, flourishing best in a mixture of equal parts of loam, peat, and sand. They are propagated by cuttings of the young wood, plunged in heat. July is their flowering month. Height, 5 ft.

Lasthenia.--A hardy annual of a rather pretty nature, suitable for flower-beds or borders. Autumn is the best time for sowing the seed, but it may also be sown early in the spring. It blooms in May. Height, 1 ft.

Lathyrus.--Handsome plants when in flower, the larger kinds being well adapted as backgrounds to other plants in the shrubbery, where they will require supports. They may be planted in any garden soil, and can be increased by seed, and some of the perennial kinds by division of the root. L. Latifolia (Everlasting Pea) flowers in August, other varieties at different times, from May onwards. Height, 1 ft. to 8 ft.

Laurel.--Laurels will grow in any good garden soil. They are grown both as bushes and standards, and require but little attention beyond watering. The standards are produced by choosing a young Portugal plant and gradually removing the side-shoots on the lower part of the stem, and when the desired height is reached a well-balanced head is cultivated, any eyes that break out on the stem being rubbed off with the thumb. Lauro Rotundifolia is beyond dispute the best of all Laurels; it is of free growth and of dense habit, and its leaves are roundish and of a lively green. (_See also_ "Epigaea.") All Laurels may be propagated by cuttings and by layers, the latter being the plan usually adopted.

Laurestinus.--_See_ "Viburnum Tinus."

Laurus.--_See_ "Bay, Sweet."

Lavatera.--The greenhouse and frame kinds grow in any light soil, and are increased by cuttings of the ripened wood, under glass. The hardy herbaceous species grow well in any common soil, and are propagated by seeds or division. The annuals are sown in the open in spring. Some bloom in June, others as late as August. Height, 2 ft. to 5 ft.