Chapter 4

Calceolaria.--Many of the varieties are suitable for the greenhouse only. They may be grown from seed, but as this is so small it should not be covered; and in watering them it is best to stand the seed-pans in water so that the moisture ascends, as watering from the top might wash the seed too deeply into the soil. July and August are the two best months for sowing. The half-shrubby kinds make fine bedding plants. They are easily reared from cuttings. These are best taken in October. Put them in light, sandy mould on a well-drained north border; press the earth round them, and cover with a hand-glass. In very frosty weather a mat should be laid over the glass. Pot them off in spring; give plenty of air, and plant them out at the beginning of June, or before, if weather permits.

Calendula (_Marigolds_).--Very showy hardy annuals. They merely require sowing in the open in autumn for an early display of bloom, or in spring for a later show, but the autumn sowing gives the more satisfaction. Flower during June and July. Height, 1 ft.

Californian Plants.--Great care should be taken not to allow the sun to strike on the collar of any of the plants from California, as they readily succumb if it does so.

Calla.--These showy plants, sometimes called Arum, are worth cultivating. They make handsome pot-plants, bearing fine white flowers in the spring. May be grown from seeds, or roots may be divided. They are quickly increased by off-sets from the root in August or September. Plant the off-sets from the fleshy roots singly in small, well-drained pots of sandy loam with one-fourth leaf-mould or well-rotted manure, and keep them in a very warm situation. Water them well while in growth, scantily after the leaves begin to wither, and afterwards give only enough moisture to keep them alive. Leave the plants in the light while the leaves die off, and then place them in a shed, in complete repose, for a month or so. Re-pot them in October or November, and give plenty of water. They may stand in saucers of water, but this must be changed daily. They flower from May to July. Height, 2 ft.

Callichroa.--A hardy annual which well deserves a place in the garden border, both on account of its dwarf and slender habit and also the colour of its flowers. It is satisfied with any ordinary soil. The seed is raised on a hotbed in March, or in the open in April, and it blooms in the autumn. Height, 1 ft.

Calliopsis.--_See_ "Coreopsis."

Callirhoe (_Digitata_).--Hardy annuals demanding but little attention. The seed is sown in the open in March. Height, 1 ft.

Calochortus Luteus.--This very handsome hardy perennial thrives best in sandy peat with a little loam. It produces yellow flowers in July, and is propagated by offsets from the bulbs. Height, 1 ft.

Caltha.--Early-flowering, showy perennials, all thriving in a moist or boggy situation. C. Leptosepala is especially choice, its pure white flowers resembling a water-lily. They may be increased from seed, or by division. Height, 1 ft.

Calthus Palustris Flore-Pleno (_Double Marsh Marigold_).--This hardy herbaceous perennial is very useful for mixing with cut flowers. It will grow anywhere, but prefers a clayey soil and a boggy situation, and may be increased by dividing the roots in spring. A succession of flowers are borne from April to June. Height, 9 in.

Calycanthus Floridus (_Allspice_).--This shrub likes an open loamy soil; flowers in July, and is propagated by layers. Height, 6 ft.

Calystegia.--A perfectly hardy climbing convolvulus, and a beautiful plant for covering arbours, etc., growing 20 ft. to 30 ft. in one season. It thrives in any loamy soil or situation; flowers from May to September, and may be increased by division of the roots.

Camassia Esculenta.--A handsome, hardy, bulbous plant, bearing clusters of beautiful blue flowers in July. It needs a sandy peat border under a north wall, and is increased by bulbs or seeds. Plant the bulbs early in October, 4 in. deep and 5 in. apart. Height, 1-1/3 ft.

Camellias.--The best soil for these beautiful greenhouse evergreens is a mixture of rough peat, plenty of sand, and a little turfy loam. The greenhouse should be kept rather close, at a temperature of 55 degrees to 60 degrees, while the plants are growing; but abundant syringing is necessary at all times. Induce a vigorous growth of wood, and let this be well matured by exposure to the sun and free ventilation. Old and straggling plants may be renovated by cutting them hard back as soon as they go out of flower, and placing them in a warm house where a moist atmosphere is maintained. This will induce them to break. Comparatively little water should be given for some time after they are cut back. When the state of the roots require the plants to be re-potted, remove as much of the old soil as possible without injuring them, and put them into the smallest sized pots into which they can be got, with fresh soil. This may be done after the last flower has fallen, or after the buds have fairly commenced to push. The plants may be placed out of doors at the beginning of June, and returned to the greenhouse in October. There are several varieties suitable for growing in the open. These should be provided with a soil, 2 ft. deep, composed of peat, leaf-mould, and cows' dung. The roots should always be kept moist and cool, and the plants disturbed as little as possible. A top dressing of fresh soil may be given each winter, and the plants protected from frost by binding straw round the stems.

Campanula.--A showy genus of plants, mostly hardy perennials, which need no special treatment. They are readily raised from seed, or division of roots. The less hardy kinds may be sown on a hotbed or in the greenhouse, and when large enough potted off. Campanula Mayii is a grand plant for hanging baskets, and also grows well trained up sticks in a pyramidal form. A rich, gritty soil suits them all. The tall-growing varieties make fine pot-plants. Flower in July. Height, 1 ft. to 5 ft.

Canary Creeper (_Tropaeolum Canariense_).--This is eminently suitable for trellis-work or for walls. Its elegant foliage and bright yellow flowers make it a general favourite. It may be raised from seed on a hotbed in spring, gradually hardened off, and planted out in May. Height, 10 ft.

Candytuft (_Iberis_).--Very pretty hardy annuals. Sow the seed in autumn in a light, rich soil, or in spring if a less prolonged flowering season will give satisfaction. Bloom in May or June. Height, 1 ft.

Canna (_Indian Shot or Hemp_).--For pot-plants on terraces, gravel walks, and such like places, few things can equal and none surpass Cannas. They are half-hardy perennials, and may be increased from seed or by dividing the roots late in autumn, allowing them first to partially dry. File the tough skin off one end of the seed, and steep it in hot water for a few hours before it is sown, then stand it in a hot place till it has germinated. Harden off and plant out, or shift into larger pots in June, using a rich, light soil. Lift and store the roots in autumn in the same way as Dahlias. Different kinds flower at various seasons, so that a succession of bloom may be had throughout the year. Height, 2 ft. to 10 ft.

Cannabis Gigantea (_Giant Hemp_).--This half-hardy Hemp is grown for its ornamental foliage, and is treated as above described. Height, 6 ft.

Canterbury Bells.--Showy hardy biennials, which may be raised from seed sown in the spring. Transplant in the autumn to the border where they are intended to flower. The seed may also be sown in a sheltered position in August or September. Flower in July. Height, 2 ft.

Cape Primroses.--_See_ "Streptocarpus."

Caprifolium.--_See_ "Honeysuckle."

Capsicum.--Sow early in March in well-drained pots of rich, light, free mould; cover the seed with 1/2 in. of soil, and keep it constantly moist at a temperature of 65 degrees. When strong enough to handle put two or three plants in a 5-in. pot, and replace them in warmth. Keep them rather close till established, then shift them into 7-in. pots. When established remove them to a cold frame and harden off. Plant out at the end of May in a warm situation. Keep them well supplied with water in dry weather and syringe the leaves. By stopping the shoots they become nice, bushy shrubs. Flower in July. Height, 1-1/2 ft.

Cardamine Pratensis (_Cuckoo Flower, or Milkmaid_).--This hardy perennial thrives in a moist, shady situation. It produces its purple flowers from May to August, and is easily propagated by seeds or division. Height, 1-1/2 ft.

Cardamine Trifolia.--A hardy herbaceous plant; will grow in any soil, flowers in May, and is easily raised from seed. Height, 1-1/2 ft.

Cardoons.--Sow two or three seeds together in clumps 1 ft. apart, in trenches prepared as for Celery, in April or May. When 6 in. high pull up the superfluous plants, leaving the strongest one in each case. When they have attained the height of 1-1/2 ft, tie the leaves lightly to a stake and earth-up the stem. Keep them well supplied with water, adding a little guano. They will be ready for use in September. Another sowing may be made in June for a spring crop.

Carduus (_Milk Thistle_).--Coarse hardy annuals; somewhat ornamental, but are hardly more than weeds. They grow freely from seed, and flower from June to August. Height, 2 ft. to 4 ft.

Carex Japonica.--This is a graceful and very beautiful variegated grass, striped green, silver, and gold, and makes a fine decoration for the table. It will grow in any moderately moist soil, and bears dividing. Sow in spring.

Carlina.--Ornamental, thistle-like, hardy perennials, which will grow in any ordinary soil. Flowers are borne from June to September. Seed may be sown as soon as it is ripe. Height, 9 in. to 2 ft.

Carnations.--These are divided into three classes, but they are all said originally to come from the clove: (1) Flakes, which are striped with one colour and white; (2) Bizarres, those streaked with two colours and white; (3) Picotees, which have each petal margined with colour on a white or yellow ground, or dotted with small spots. For pot culture, about the end of March put two roots in an 11-in. pot, filled with light, turfy loam, well drained (too much moisture being injurious), pressing the earth firmly round the roots. Stand them on a bed of ashes in a sheltered position, and when the flower-stems appear, stake and tie up carefully. As the buds swell thin out the weakly ones. To prevent them bursting unevenly put an india-rubber ring round the bud, or tie it with raffia. They will flourish in the open borders even in towns if planted in light loam, and may be propagated by _layers_ at the end of July or beginning of August. Choose for this purpose fine outside shoots, not those which have borne flowers. Cut off all the lower leaves, leaving half a dozen near the top untouched. Make incisions on the under sides of the layers, just below the third joint. Peg down, and cover the stems with equal quantities of leaf-mould and light loam. Do not water them till the following day. The young plants may be separated and potted off as soon as they have taken root--say, the end of August. They may also be increased by _pipings_. Fill the pots nearly to the top with light, rich mould and fill up with silver sand. Break off the pipings at the third joint, then in each piping cut a little upward slit, plant them pretty thickly in the sand, and place the pot on a gentle hotbed, or on a bed of sifted coal ashes. Put on the sashes, and keep the plants shaded from the sun till they have taken root, then harden off gradually, and place each of the young plants separately in a small pot. Carnations may also be grown from seed sown in spring. When the seedlings have made six or eight leaves, prick them out into pots or beds. They will flower the following year. The beds must be well drained, as stagnant wet is very injurious to them.

Carnation Margaritae.--May be sown in heat during February or March, pricked out when strong enough, and planted in the open in May or June.

Carpenteria Californica.--The white flowers of this evergreen shrub, which make their appearance in July, are delicately fragrant. The plant is most suitable for a cool greenhouse, but does well in the open, in warm, well-drained situations. When grown in pots the mould should consist of two parts turfy loam, one part peat, and a little sharp sand. It may be increased by seeds or by cuttings planted in sandy soil, with a medium bottom heat.

Carrots.--To grow them to perfection carrots require a deep, rich, sandy soil, which has been thoroughly trenched and manured the previous autumn. For the main crop the seed should be sown in March, either broadcast or in rows 18 in. apart. A calm day must be chosen for sowing, as the seed is very light and liable to be blown about. It has also a tendency to hang together, to obviate which it is generally rubbed into some light soil or sand previously to being scattered. Thin out to a distance of from 4 to 7 in., according to the kind grown. For early use the French Horn may be sown on a hotbed in January and February. Keep the surface of the ground well open with the hoe.

Cassia Corymbosa.--This stove shrub is an evergreen. It should be grown in a mixture of loam and peat, and may be increased by cuttings planted in sand under glass in a little heat. It flowers in July. Height, 3 ft.

Castor Oil Plants.--_See_ "Ricinus."

Catananche.--Pretty hardy biennials that will grow in almost any soil, and may be increased by seed or division. They bloom in August. Height, 21/2 ft. to 3 ft.

Catchfly.--_See_ "Silene."

Cathcartia Villosa.--A beautiful Himalayan poppy, possessing a rich, soft, hairy foliage and yellow flowers, borne in succession from June to September. Any light, rich soil suits it, but it requires a sheltered position. It is propagated by seeds sown in spring. Height, 11/2 ft.

Cauliflowers.--Sow thinly in pans or shallow boxes early in February and March on a gentle bottom-heat. Make a larger and the main sowing in the open ground in March, April, and May for autumn cutting. A sowing should also be made in August for spring and summer use. These latter should be pricked into a frame or under a hand-glass during the winter, and in spring planted out so as to stand 30 in. apart. When the heads appear break some of the large leaves down over them to afford protection, and during the whole of their growth pour plenty of water round the stems in dry weather. They require a thoroughly rich and well-tilled soil to grow them to perfection.

Ceanothus.--A genus of handsome and ornamental evergreen shrubs. They are free-flowering and suitable for the conservatory or outdoor decoration if placed in warm situations. They flourish best in peat and loam, and are increased by cuttings planted in sand and subjected to gentle heat. Height, 3 ft. to 6 ft.

Cedronella.--Ornamental hardy perennials; will grow in any soil, but require a little protection in the winter. They produce their deep purple flowers in June. Height, 3 ft.

Cedrus Deodora.--A beautiful and graceful conifer, its arched branches being thickly set with long grey-coloured or whitish-green leaves. In its young stage it makes an exquisite specimen for the lawn. It is the best of all the Cedars for such a purpose. The usual method of propagating it is by grafting it on to the common Larch.

Celery.--Sow in February or early in March on a mild hotbed for the earliest crop. Prick the seedlings off into shallow boxes as soon as they are large enough to handle, and keep them rather close and warm until they are established. Towards the end of March prick them out in rows in a frame, setting them 6 in. apart each way, and early in May transfer to rather shallow trenches, protecting them from night frosts. For main and late crops sow in a cold frame in April and plant out in June or July, 9 in. apart, in trenches 3 ft. distant from each other, 9 in. wide, and 18 in. deep, pressing the soil firmly round the roots. Earthing up should be delayed until the plants are nearly full grown, and should be done gradually; but let the whole be completed before the autumn is far advanced. When preparing the trench plenty of manure should be dug into the soil. Water liberally until earthed up to ensure crisp, solid hearts, and an occasional application of liquid manure will benefit the plants. During winter protect from frost with straw, or other suitable material.

Celosia (_Feathered Cockscomb_).--Sow the seed in early spring in a warm frame; prick off singly into small pots, and re-pot as they advance in strength in a compost of loam, leaf-mould, old manure, and sand. Their final shift should be into 24-sized pots. Give them abundance of liquid manure, never allowing them to become dry, and syringe freely. These half-hardy annuals, rising to the height of 3 ft. and bearing fine spikes of flowers in July and August, make fine pot-plants for table decoration. They may be planted in the open, in June, choosing a warm, sheltered situation and rich, loamy soil.

Centaurea.--The hardy annual and biennial kinds merely require to be sown in the open in the autumn. The half-hardy ones must be sown on a slight hotbed, where they should remain till strong enough to be planted in the border. Cuttings of the perennials should be inserted singly in 3-in. pots filled with sandy loam, placed in a shady, cool frame till established, and then watered very carefully. The different varieties vary from 6 in. to 2 ft. in height, and flower from June to August.

Centauridium Drummondi.--A blue hardy annual which may be sown in the open in spring.

Centranthus.--Ornamental hardy annuals. Sow in the open border in March in any good, well-drained soil. They flower in June. Height, 1-1/2 ft.

Cephalaria (_Yellow Scabious_).--Strong-growing hardy perennials, suitable for backs of borders. They succeed in any garden soil, and are propagated by seed or division of root. Height, 3 ft. to 5-1/2 ft.

Cephalotaxus (_Podocarpus Koraiana_).--Handsome conifers of the Yew type. These shrubs are quite hardy, and in favoured localities will produce berries. They succeed best in a damp, shady spot, and may be increased by cuttings planted in heavy loam.

Cerastium Biebersteini.--A hardy trailing perennial which will grow in any light soil, and may be increased by suckers. It flowers in June. Height, 6 in.

Cerasus Padus (_Bird Cherry_).--An ornamental tree; useful in the shrubbery in its earlier stages, as it will grow in any soil. It may be increased by seed, budding, or grafting; flowers in April. Height, 35 ft.

Cerinthe.--Hardy annuals, suitable for any ordinary soil, and needing merely ordinary treatment. A grand plant for bees. Height, 1 ft.

Cestrums.--Charming conservatory plants, flowering early in spring. Cuttings may be taken in autumn, placed in small pots in a light compost of peat and sand, and given a little bottom-heat. The young plants may be topped to form bushy ones. Re-pot before the roots have filled the small pots, using two parts loam, one part peat, and one part sharp sand. C. Parqui is suitable for the open if planted in a sheltered position.

Chamaepeuce.--Half-hardy perennial Thistle plants of little merit. Any soil suits them, and they may be increased by seed or division. Flower in June. Height, 2 ft. to 3 ft.

Chamaerops (_Chusan Palm_).--Fine greenhouse plants, delighting in a rich, loamy soil. Height, 10 ft.

Cheiranthus.--_See_ "Wallflower."

Chelidonium.--This hardy perennial will flourish in any garden soil; flowers in May, and may be increased by division. Height, 2 ft.

Chelone.--Charming hardy herbaceous plants. Succeed well in a mixture of peat and loam or any rich soil. Increased by division of root, or by seed treated like other hardy perennials. They are very effective for the centre of beds, or in groups. Bloom in July. Height, 3 ft.

Cherries.--A light, rich soil is the one that Cherries succeed in best, though they will grow in any fairly good dry ground. The position should be open, but at the same time sheltered, as the blossoms are liable to be cut off by spring frosts. The planting may be done at any time during November and the beginning of March, when the ground is in a workable condition. Cherries are often worked upon the Mahaleb stock. As they have a tendency to gumming and canker, the knife should be used as little as possible, but where pruning is necessary, let it be done in the summer. If gumming occurs, cut away the diseased parts and apply Stockholm tar to the wounds. Aphides or black-fly may be destroyed by tobacco dust and syringing well with an infusion of soft soap. Morello succeeds on a north wall. Bigarreau, Waterloo, Black Eagle, Black Tartarian, May Duke, White Heart, and Kentish are all good sorts. Bush trees should stand 10 ft. apart, standards 30 ft.

Cherry (_Cornelian_).--_See_ "Cornus Mas."

Cherry Pie.--_See_ "Heliotrope."

Chervil.--For summer use sow in March, and for winter requirements in July and August, in shallow drills 6 or 8 in. apart. Cut for use when 3 or 4 in. high. The tender tops and leaves are used in soups and stews, to which they impart a warm, aromatic flavour. They likewise give piquancy to mixed salads.

Chestnuts.--To raise trees from seed sow the nuts in November, about 2 in. deep. When two years old they may be transplanted to their permanent site. The only pruning they require is to cut away any branches which would prevent the tree forming a well-balanced head.

Chicory.--Sow in May or June in drills of rich soil, and thin out to 6 in. apart. In autumn lift the roots and store them in dry sand. To force leaves for salads, plant the roots closely together in boxes or large pots, with the tops only exposed, using ordinary soil; place in a temperature of 55 degrees, and keep in the dark. Long blanched leaves will soon appear, ready for use.

Chilli.--Same treatment as Capsicum.

Chimonanthus Fragrans (_Japan Allspice_).--This delightfully fragrant hardy shrub, known as the Winter Flower, produces its blooms in January before the leaves appear. Should sharp frost set in, protection ought to be given to the flowers. The plant requires a fairly good soil, and is most at home when trained against a wall. It is generally propagated by means of layers. Height, 6 ft.

Chinese Sacred Narcissus (_Oriental Lily, Joss Flower, or Flower of the Gods, the Chinese emblem of good luck_).--This is a very beautiful variety of the Polyanthus Narcissus, and is grown to bloom at the advent of the Chinese New Year. It is very fragrant and free blooming, and is generally flowered in an ornamental bowl of water, the bulb being surrounded with pretty pebbles to keep it well balanced. It may also be grown in a pot of mould, kept in a dark place for about ten days, then placed in a sunny position and supplied with water. It flowers from six to eight weeks after planting.

Chionanthus Virginica (_Fringe Tree_).--A curious shrub which is best raised from seed. It succeeds in any soil, and bears white flowers in July. It will grow to the height of 20 ft. or more.

Chionodoxa Luciliae (_Glory of the Snow_).--A pretty hardy spring-flowering bulbous plant. The blossoms, from five to six in number, are produced on gracefully arched stems, 4 to 8 in. high, and are nearly 1 in. across, star-like in form, and of a lovely blue tint on the margin, gradually merging into pure white in the centre. Fine for growing in clumps. Plant the bulbs in autumn in equal parts of loam, peat, and sand. It succeeds fairly well in the open, but reaches perfection in a cold frame, where the flowers will be produced in March. Height, 6 in.