Manual of Gardening Part 51

When set out of doors, they should be protected from strong winds, and from the full glare of direct sunlight. The soil should be rich and deep, and the plants should have an abundance of water. They do well about ponds (see Plate X).

Caladiums are most excellent plants for striking effects, especially against a house, high shrubbery, or other background. If they are planted by themselves, they should be in clumps rather than scattered as single specimens, as the effect is better. See that they get a good start before they are planted in the open ground. As soon as killed down by frost, dig them, dry the roots of superfluous moisture, and store till wanted in late winter or spring.

CALCEOLARIA.--The calceolarias are small greenhouse herbs sometimes used in the window-garden. They are not very satisfactory plants for window treatment, however, since they suffer from dry atmosphere and from sudden changes of temperature.

The calceolarias are grown from seeds. If the seeds are sown in early summer and the young plants are transplanted as they need, flowering specimens may be had for the late fall and early winter. In the growing of the young plants, always avoid exposing them to direct sunlight; but they should be given a place that has an abundance of screened or tempered light. A new crop of plants should be raised each year.

There is a race of shrubby calceolarias, but it is little known in this country. One or two species are annuals adaptable to cultivation in the open garden, and their little ladyslipper-like flowers are attractive.

However, they are of secondary importance as annual garden flowers.

CALLA (properly _Richardia_), Egyptian lily.--The calla is one of the most satisfactory of winter house-plants, lending itself to various conditions.

The requirements of the calla are rich soil and an abundance of water, with the roots confined in as small a s.p.a.ce as possible. If a too large pot is used, the growth of foliage will be very rank, at the expense of the flowers; but by using a smaller-sized pot and applying liquid manure, the flowers will be produced freely. A 6-inch pot will be large enough for all but an exceptionally large bulb or tuber. If desired, a number of tubers may be grown together in a larger pot. The soil should be very rich but fibrous--at least one third well-rotted manure will be none too much, mixed with equal parts of fibrous loam and sharp sand.

The tubers should be planted firmly and the pots set in a cool place to make roots. After the roots have partially filled the pot, the plant may be brought into heat and given a sunny position and an abundance of water. An occasional sponging or washing of the leaves will free them from dust. No other treatment will be required until the flowers appear, when liquid manure may be given.

The plant will thrive all the better at this time if the pot is placed in a saucer of water. In fact, the calla will grow well in an aquarium.

The calla may be grown through the entire year, but it will prove more satisfactory, both in leaf and flower, if rested through part of the summer. This may be done by laying the pots on their sides in a dry shady place under shrubbery, or if in the open slightly covered with straw or other litter to keep the roots from becoming extremely dry. In September or October they may be shaken out, cleaning off all the old soil, and repotted, as already mentioned. The offsets may be taken off and set in small pots and given a year's growth, resting them the second year and having them in flower that winter.

The spotted calla has variegated foliage and is a good plant for mixed collections. This blooms in the spring, which will lengthen the season of calla bloom. The treatment of this is similar to that of the common calla.

CAMELLIAS are half-hardy woody plants, blooming in late winter and spring. Years ago camellias were very popular, but they have been crowded out by the informal flowers of recent times. Their time will come again.

During the blooming season keep them cool--say not over 50 at night and a little higher by day. When blooming is done they begin to grow; then give them more heat and plenty of water. See that they are well ripened by winter with large plump flower-buds. If they are neglected or kept too dry during their growing season (in summer) they will drop their buds in fall. The soil for camellias should be fibrous and fertile, compounded of rotted sod, leafmold, old cow manure, and sufficient sand for good drainage. Always screen them from direct sunlight. Do not try to force them in early winter, after the growth has ceased. Their summer quarters may be in a protected place in the open air.

Camellias are propagated by cuttings in winter, which should give blooming plants in two years.

CANNAS are among the most ornamental and important plants used in decorative gardening. They make fine herbaceous hedges, groups, ma.s.ses, and--when desirable--good center plants for beds. They are much used for subtropical effects (see Plate V).

Cannas grow 3 to 10 feet or more high. Formerly they were valued chiefly for their foliage, but since the introduction, in 1884, of the Crozy Dwarf French type with its showy flowers, cannas are grown as much for their bloom as for their foliage effects. The flowers of these new kinds are as large as those of gladioli, and are of various shades of yellow and red, with banded and spotted forms. These flowering kinds grow about 3 feet high. The older forms are taller. In both sections there are green-leaved and dark coppery-red-leaved varieties.

The canna may be grown from seed and had in bloom the first year by sowing in February or March, in boxes or pots placed in hotbeds or a warm house, first soaking the seeds in warm water for a short time or filing a small notch through the coat of each seed (avoiding the round germinating point). It requires two years to raise strong plants of the old-fashioned tall cannas from seed. Sow in light, sandy soil, where the earth may be kept at 70 till after germination. After the plants have got well up, transplant them to about 3 or 4 inches apart, or place in pots 3 inches wide, in good rich soil. They may now be kept at 60.

The majority of cannas, however, are grown from pieces of the roots (rhizomes), each piece having a bud. The roots may be divided at any time in the winter, and if early flowers and foliage are wanted, the pieces may be planted in a hotbed or warmhouse in early April, started into growth, and planted out where wanted as soon as the ground has warmed and all danger of frost is over. A hardening of the plants, by leaving the sash off the hotbeds, or setting the plants in shallow boxes and placing the boxes in a sheltered position through May, not forgetting a liberal supply of water, will fit the plants to take kindly to the final planting out.

Plant out roots or started plants when there is no longer danger of frost. For ma.s.s effects, the plants may stand twelve to eighteen inches apart; for individual bloom twenty to twenty-four inches or more. Some gardeners plant them not closer than twenty to twenty-four inches for ma.s.s beds, if the soil is good and the plants strong. Give them a warm sunny place.

The old (foliage) sorts may be left out late to ripen up the fleshy root-stocks. Cut the tops off immediately after frost. The roots are safe in the ground as long as it does not freeze. Dig, and dry or "cure"

for a few days, then winter them like potatoes in the cellar. It is a common mistake to dig canna roots too early.

The French sorts are commonly thought to keep best if kept growing somewhat during the winter; but if managed right, they may be carried over like the others. Immediately after frost, cut off the tops next the ground. Cover the stumps with a little soil and leave the roots in the ground till well ripened. Clean them after digging, and cure or dry them for a week or more in the open air and sun, taking them indoors at night. Then place them away from frost in a cool, dry place.

CARNATIONS are now among the most popular florists' flowers; but it is not generally known that they be easily grown in the outdoor garden.

They are of two types, the outdoor or garden varieties, and the indoor or forcing kinds. Normally, the carnation is a hardy perennial, but the garden kinds, or marguerites, are usually treated as annuals. The forcing kinds are flowered but once, new plants being grown each year from cuttings.

Marguerite carnations bloom the year the seed is sown, and with a slight protection will bloom freely the second year. They make attractive house plants if potted in the fall. The seeds of these carnations should be sown in boxes in March and the young plants set out as early as possible, pinching out the center of the plant to make them branch freely. Give the same s.p.a.ce as for garden pinks.

The winter-flowering carnations have become prime favorites with all flower lovers, and a collection of winter house-plants seems incomplete without them.

Carnations grow readily from cuttings made of the suckers that form around the base of the stem, the side shoots of the flowering stem, or the main shoots before they show flower-buds. The cuttings from the base make the best plants in most cases. These cuttings may be taken from a plant at any time through the fall or winter, rooted in sand and potted up, to be held in pots until the planting out time in the spring, usually in April, or any time when the ground is ready to handle. Care should be taken to pinch out the tops of the young plants while growing in the pot, and later while in the ground, causing them to grow stocky and send out new growths along the stem. The young plants should be grown cool, a temperature of 45 suiting them well. Attention should be given to spraying the cuttings each day while in the house to keep down the red spider, which is very partial to the carnation.

In the summer, the plants are grown in the field, and not in pots, being transplanted from the cutting-box. The soil in which they are to be planted should be moderately rich and loose. Clean cultivation should be given throughout the summer. Frequently pinch out the tops.

The plants are taken up in September and potted firmly, and well watered; then set in a cool, partially shaded situation until root growth has started, and watering the plant as it shows need of water.

The usual living-room conditions as to moisture and heat are not such as the carnation demands, and care must be taken to overcome the dryness by spraying the foliage and setting the plant in a position not exposed to the direct heat of a stove or the sun. In commercial houses, it is not often necessary to spray established plants. Pick off most or all of the side buds, in order to add to the size of the leading flowers. After all is said, it is probably advisable in most cases to purchase the plants when in bloom from a florist, and after blooming either throw them away or store them for planting out in the spring, when they will bloom throughout the summer.

If conditions are right, the rust should not be very troublesome, if the start was made with clean stock. Keep all rusted leaves picked off.

CENTURY PLANTS or agaves are popular plants for the window-garden or conservatory, requiring little care and growing slowly, thus needing repotting only at long intervals. When the plants have outgrown their usefulness as house-plants, they are still valuable as porch decorations, for plunging in rock-work, or about rustic nooks. The striped-leaved variety is the most desirable, but the normal type, with its blue-gray leaves, is highly ornamental.

There are a number of dwarf species of agave that are not so common, although they may be grown with ease. Such plants add novelty to a collection, and may be used through the summer as noted above or plunged with cactus in a bed of tropical plants. All succeed well in loam and sand in equal parts, with a little leafmold in the case of the small varieties.

The more common species are propagated by suckers from around the base of the established plants. A few kinds having no suckers must be grown from seed.

As to watering, they demand no special care. Agaves will not stand frost to any extent.

When the head throws up its great stem and blooms, it may exhaust itself and die; but this may be far short of a century. Some species bloom more than once.

CHRYSANTHEMUMS are of many kinds, some being annual flower-garden plants, some perennial border subjects, and one form is the universal florists' plant. In chrysanthemums are now included the pyrethrums.

The annual chrysanthemums must not be confounded with the well-known fall-flowering kinds, as they will prove a disappointment if one expects large flowers of all colors and shapes. The annuals are mostly coa.r.s.e-growing plants, with an abundance of bloom and a rank smell. The flowers are single in most cases, and not very lasting. They are useful for ma.s.sing and also for cut-flowers. They are among the easiest of hardy annuals to grow. The stoniest part of the garden will usually suit them. Colors white and shades of yellow, the flowers daisy-like; 1-3 ft.

Amongst perennial kinds, _Chrysanthemum frutescens_ is the well-known Paris daisy or marguerite, one of the most popular of the genus. This makes a good pot-plant for the window-garden, blooming throughout the winter and spring months. It is usually propagated by cuttings, which, if taken in spring, will give large blooming plants for the next winter.

Gradually transfer to larger pots or boxes, until the plants finally stand in 6-inch or 8-inch pots or in small soap boxes. There is a fine yellow-flowered variety. The marguerite daisy is much grown out-of-doors in California.

The hardy perennial kinds are small-flowered, late-blooming plants, known to many old people as "artemisias." They have been improved of late years, and they are very satisfactory plants of easy culture. The plants should be renewed from seed every year or two.

In variety of form and color, and in size of bloom, the florists'

chrysanthemum is one of the most wonderful of plants. It is a late autumn flower, and it needs little artificial heat to bring it to perfection. The great blooms of the exhibitions are produced by growing only one flower to a plant and by feeding the plant heavily. It is hardly possible for the amateur to grow such specimen flowers as the professional florist or gardener does; neither is it necessary. A well-grown plant with fourteen to twenty flowers is far more satisfactory as a window-plant than a long, stiff stem with only one immense flower at the apex. The culture is simple, much more so than that of many of the plants commonly grown for house decoration. Although the season of bloom is short, the satisfaction of having a fall display of flowers before the geraniums, begonias, and other house-plants have recovered from their removal from out of doors, repays all efforts. Very good plants can be grown under a temporary shed cover, as shown in Fig.

268. The roof need not necessarily be of gla.s.s. Under such a cover, also, potted plants, in bloom, may be set for protection when the weather becomes too cold.

Cuttings taken in March or April, planted out in the border in May, well tended through the summer and lifted before frost in September, will bloom in October or November. The ground in which the plants are to bloom should be moderately rich and moist. The plants may be tied to stakes. When the buds show, all but the center one of each cl.u.s.ter on the leading shoots should be picked off, as also the small lateral branches. A thrifty bushy plant thus treated will usually have flowers large enough to show the character of the variety, also numbers enough to make a fine display.

After blooming, the plants are lifted from the border. As to the receptacle into which to put them, it need not be a flower-pot. A pail or soap-box, with holes bored for drainage, will suit the plant just as well, and by covering the box with cloth or paper the difference will not be noticed.

If cuttings are not to be had, young plants may be bought of the florists and treated in the manner described. Buy them in midsummer or earlier.

It is best not to attempt to flower the same plant two seasons. After the plant has bloomed, the top may be cut down, and the box set in a cellar and kept moderately dry. In February or March, bring the plant to the sitting-room window and let the shoots start from the root. These shoots are taken for cuttings to grow plants for the fall bloom.

CINERARIA is a tender greenhouse subject, but it may be grown as a house-plant, although the conditions necessary to the best results are difficult to secure outside a gla.s.shouse.

The conditions for cinerarias are a cool temperature, frequent repotting, and guarding against the attacks of the greenfly. Perhaps the last is the most difficult, and with one having no facilities for fumigating, it will be almost impossible to prevent the difficulty. A living room usually has too dry air for cinerarias.

The seed, which is very minute, should be sown in August or September to have plants in bloom in January or February. Sow the seed on the surface of fine soil and water very lightly to settle the seeds into the soil. A piece of gla.s.s or a damp cloth may be spread over the pot or box in which the seeds are sown, to remain until the seeds are up. Always keep the soil damp, but not wet. When the seedlings are large enough to repot, they should be potted singly in 2-or 3-inch pots. Before the plants have become pot-bound, they should again be repotted into larger pots, until they are in at least 6-inch pots in which to bloom.

In all this time, they should be grown cool and, if not possible to fumigate them with tobacco, the pots should stand on tobacco stems, which should be moist at all times. The general practice, in order to have bushy plants, is to pinch out the center when the flower-buds show, causing the lateral branches to start, which they are slow to do if the central stem is allowed to grow. Plants bloom but once.