In a retentive soil Cardoons should be grown on the flat, but the plant is a tolerably thirsty subject, and must have sufficient water. Hence on very dry soils it may be necessary to put it in trenches after the manner of Celery, and then it will obtain the full benefit of all the water that may be administered. In any case the soil must be rich and well pulverised if a satisfactory growth is to be obtained.
Towards the end of April rows are marked out three or four feet apart, and groups of seed sown at intervals of eighteen inches in the rows. The plants are thinned to one at each station, and in due time secured to stakes. Full growth is attained in August, when blanching is commenced by gathering the leaves together, wrapping them round with bands of hay, and earthing up. It requires from eight to ten weeks to accomplish the object fully. The French method is quicker. Seed is sown in pots under glass, and in May the plants are put out three feet apart. When fully grown the Cardoons are firmly secured to stakes by three small straw bands. A covering of straw, three inches thick, is thatched round every plant from bottom to top, and each top is tied and turned over like a nightcap. A little soil is then drawn to the foot, but earthing up is needless. In about a month blanching is completed.
CARROT
Daucus Carota
The Carrot is a somewhat fastidious root, for although it is grown in every garden, it is not everywhere produced in the best style possible. The handsome long roots that are seen in the leading markets are the growth of deep sandy soils well tilled. On heavy lumpy land long clean roots cannot be secured by any kind of tillage. But for these unsuitable soils there are Sutton’s Early Gem, the Champion Horn, and Intermediate, which require no great depth of earth; while for deep loams the New Red Intermediate answers admirably.
Forcing.—Carrots are forced in frames on very gentle hot-beds. They cannot be well grown in houses, and they must be grown slowly to be palatable. It is usual to begin in November, and to sow down a bed every three or four weeks until February. A lasting hot-bed is of the first importance, and it is therefore necessary to have a good supply of stable manure and leaves. The material should be thoroughly mixed and allowed to ferment for a few days. Then turn the heap again, and a few days later the bed may be made up. In order to conserve the heat the material will need to be three to four feet deep, and if a box frame is used the bed should be at least two feet wider than the frame. Build up the material in even, well-consolidated layers, to prevent unequal and undue sinking, and make the corners of the bed perfectly sound. Put on the bed about one foot depth of fine, rich soil; if there is any difficulty about this, eight inches must suffice, but twelve is to be preferred. As the season advances less fermenting material will be needed, and a simple but effective hot-bed may be made by digging out a hole of the required size and filling it with the manure. The latter will in due time sink, when the soil may be added and the frame placed in position. The bed should always be near the glass, and a great point is gained if the crop can be carried through without once giving water, for watering tends to damage the shape of the roots. No seed should be sown until the temperature has declined to 80°. Sow broadcast, cover with siftings just deep enough to hide the seed, and close the frame. If after an interval the heat rises above 70°, give air to keep it down to that figure or to 65°. It will probably decline to 60° by the time the plant appears, but if the bed is a good one it will stand at that figure long enough to make the crop. Thin betimes to two or three inches, give air at every opportunity, let the plant have all the light possible, and cover up when hard weather is expected. Should the heat go down too soon, linings must be used to finish the crop. Radishes and other small things can be grown on the same bed. In cold frames seed may be sown in February.
Warm Borders.—In March the first sowings on warm borders in the open garden may be made. These may need the shelter of mats or old lights until the plant has made a good start, but it is not often the plant suffers in any serious degree from spring frosts, as the seed will not germinate until the soil acquires a safe temperature. All the early crops of Carrot can be grown on a prepared soil, or a light sandy loam, free from recent manure. The drills may be spaced from six to nine inches apart.
For the main crops double digging should be practised, and if the staple is poor a dressing of half-rotten dung may be put in with the bottom spit. But a general manuring as for a surface-rooting crop is not to be thought of, the sure effect being to cause the roots to fork and fang most injuriously. It is sound practice to select for Carrots a deep soil that was heavily manured the year before, and to prepare this by double digging without manure in the autumn or winter, so as to have the ground well pulverised by the time the seed is sown. Then dig it over one spit deep, break the lumps, and make seed-beds four feet wide. Sow in April and onwards in drills, mixing the seed with dry earth, the distance between rows to be eight to twelve inches according to the sort; cover the seed with a sprinkling of fine earth and finish the bed neatly. As soon as possible thin the crop, but not to the full distance in the first instance. The final spacing for main crops may be from six to nine inches, determined by the variety. By a little management it will be an easy matter during showery weather to draw delicate young Carrots for the final thinning, and these will admirably succeed the latest of the sowings in frames and warm borders.
Late Crops.—Sowings of early varieties made in July will give delicate little roots during the autumn and winter. The rows may be placed nine inches apart, and it is essential to thin the plants early to about three inches apart in the rows. In the event of very severe weather protect with dry litter. For providing young Carrots throughout the winter it is also an excellent plan to broadcast seed thinly. When grown in this way the plants afford each other protection, and the roots may be drawn immediately they are large enough.
In July the culture of the smaller sorts may also be undertaken in frames, but hot-beds may be dispensed with, and lights will not be wanted until there is a crop needing protection, when the lights may be put on, or the frames may be covered with shutters or mats.