As an article of food Peas are the most nutritious of all vegetables, rich in phosphates and alkalies, and the plant makes a heavy demand on the soil, constituting what is termed an exhausting crop. For this reason, and also because the time that elapses between sowing seed and gathering the produce is very brief, it is imperative that the land should be well prepared to enable the roots to ramify freely and rapidly collect the food required by the plant.
Treatment of Soil.—The soil for Peas must be rich, deep, and friable, and should contain a notable proportion of calcareous matter. Old gardens need to be refreshed with a dressing of lime occasionally, or of lime rubbish from destroyed buildings, to compensate for the consumption of calcareous matters by the various crops. For early Peas, a warm dry sandy soil is to be preferred; for late sorts, and especially for robust and productive varieties, a strong loam or a well-tilled clay answers admirably, and it is wise to select plots that were in the previous year occupied with Celery and other crops for which the land was freely manured and much knocked about. Heavy manuring is not needed for the earliest Peas, unless the soil is very poor, but for the late supplies it will always pay to trench the ground, and put a thick layer of rotten manure at the depth of the first spit, in which the roots can find abundant nutriment about the time when the pods are swelling. In all cases it is advisable not to enrich in any special manner the top crust for Peas. When the young plant finds the necessary supplies near at hand, the roots do not run freely but are actually in danger of being poisoned; but when the plant is fairly formed, and has entered upon the fruiting stage, the roots may ramify in rich soil to advantage. Hence the desirability of growing Peas in ground that was heavily manured and frequently stirred in the previous year, and of putting a coat of rotten manure between the two spits in trenching. As regards the last-named operation, it should be remarked that as Peas require a somewhat fine tilth, the top spit should be kept on the top where the second spit will prove lumpy, pasty, or otherwise unkind. In this case bastard trenching will be sufficient; but when the second spit may be brought up with safety, it should be done for the sake of a fresh soil and a deep friable bed. The use of wood ashes, well raked in immediately in advance of sowing, will prove highly beneficial to the crop, for the Pea is a potash-loving plant.
Method of Sowing.—It will always pay to sow in flat drills about six inches wide, but the V-shaped drill in which the seedlings are generally crowded injuriously is not satisfactory. Two inches apart each way is a useful distance for the seed, although more space may be given for the robust-growing maincrop and late varieties. It is wise policy, however, to sow liberally in case of losses through climatic conditions, birds or mice; and if necessary superfluous plants can always be withdrawn. The depth for the seed may vary from two to three inches: the minimum for heavy ground and the maximum for light land.
Early Crops (sown outdoors).—Early Peas are produced in many ways. The simplest consists in sowing one or more of the quick-growing round-seeded varieties in November, December, and January, on sloping sheltered borders expressly prepared for the purpose, and provided with reed hurdles to screen the plants from cutting winds. Where the assaults of mice are to be apprehended, it is an excellent plan to soak the seed in paraffin oil for twenty minutes, and then, having sown in drills only one inch deep, heap over the drill three inches of fine sand. If this cannot be done, sow in drills fully two inches deep, for shallow sowing will not promote earliness, but it is likely to promote weakness of the plant. It is not usual to grow any other crop with first-early Peas, but the rows must be far enough apart to prevent them from shading one another, and, if possible, let them run north and south, that they may have an equable enjoyment of sunshine. As soon as the plant is fairly out of the ground, dust carefully with soot, not enough to choke the tender leaves, but just sufficient to render them unpalatable to vermin. When they have made a growth of about three inches, put short brushwood to support and shelter them, deferring the taller sticks until they are required. Then fork the ground between, taking care not to go too near to the plant. Sticks must be provided in good time, lest the plant should be distressed, for not only do the sticks give needful support, but they afford much shelter, as is the case with the small brushwood supplied in the first instance.
On fairly warm soils the first opportunity should be taken to sow one of the early dwarf marrowfat varieties in the open ground. This may be in February or early March, but it will be useless to make the attempt until the ground is in a suitable condition. Sow in flat drills as already described, the distance from row to row depending upon future plans. If no intercropping is to be done, eighteen inches between the rows will generally suffice for dwarf-growing Peas, but many gardeners prefer to allow three feet and to take a crop of Spinach on the intervening space.
Early Crops (sown under glass.)—We now come to the modes of growing early Peas by the aid of glass. The surest and simplest method is to provide a sufficiency of grass turf cut from a short clean pasture or common. There is in this case a risk of wireworm and black bot; but if the turf is provided in good time and is laid up in the yard ready for use, it will be searched by the small birds and pretty well cleansed of the insect larvas that may have lurked in it when first removed. Lay the turves out in a frame, grass side downwards, and give them a soaking with water in which a very small quantity of salt has been dissolved. This will cause the remaining bots and slugs to wriggle out, and by means of a little patient labour they can be gathered and destroyed. In January or February sow the seed rather thickly in lines along the centre of each strip of turf, and cover with fine earth. By keeping the frame closed a more regular sprouting of the seed will be insured; but as soon as the plants rise, air must be given, and this part of the business needs to be regulated in accordance with the weather. All now depends on the cultivator, for, having a very large command of conditions, it may be said that he is removed somewhat from the sport of the elements, which wrecks many of our endeavours. There are now three points to be kept in mind. In the first place, a short stout slow-growing plant is wanted, for a tall lean fast-growing plant will at the end of the story refuse to furnish the dish of Peas aimed at. Give air and water judiciously, and protect from vermin and all other enemies. A little dry lime or soot may be dusted over the plants occasionally, but not sufficient to choke the leaves. All going well, plant out in the month of March or April, on ground prepared for the purpose, and laying the plant-bearing turves in strips, without any disturbance whatever of the roots. Then earth them up with fine stuff from between the rows, and put sticks to support and shelter them.
A more troublesome, but often a safer method, is to raise plants in pots, or in boxes about four and a half inches deep and pierced at the bottom to insure free drainage. Old potting soil will answer admirably, and the seeds should be put in one inch deep and two inches apart. Place the pots or boxes in any light cool structure as near the roof-glass as possible, but make no attempt to force either germination or the growth of the plants. When fair weather permits, transfer to the open in March or April. A good succession may be obtained by sowing a first-early dwarf variety and a second-early kind simultaneously.
Main crops require plenty of room, and that is really the chief point in growing them. Supposing the ground has been well prepared as already advised, the next matter of importance is the distance between the rows. The market gardener is usually under some kind of compulsion to sow Peas in solid pieces, just far enough apart for fair growth, and to leave them to sprawl instead of being staked, because of the cost of the proceeding. But the garden that supplies a household is not subject to the severe conditions of competition, and Peas may be said to go to the dinner table at retail and not at wholesale price. Moreover, high quality is of importance, and here the domestic as distinguished from the commercial gardener has an immense advantage, for well-grown ‘Garden Peas’ surpass in beauty and flavour the best market samples procurable. To produce these fine Peas there must be plenty of space allowed between the rows, and it will be found good practice to grow Peas and early Potatoes on the same plot, and to put short sticks to the Peas as soon as they are forward enough. By this management the first top-growth of the Potatoes may be saved from late May frosts, and the Peas will give double the crop of a crowded plantation. The general sowings of Peas are made from March to June, but as regards the precise time, seasons and climates must be considered. Nothing is gained by sowing maincrop Peas so early as to subject the plant to a conflict with frost. It should be understood that the finest sorts of Peas are somewhat tender in constitution, and the wrinkled sorts are more tender than the round. Hence, in any case, the wrinkled seeds should be sown rather more thickly than the round to allow for losses; but robust-habited Peas should never be sown so thickly as the early sorts, for every plant needs room to branch and spread, and gather sunshine by means of its leaves for the ultimate production of superb Green Peas.
Late Crops.—To obtain Peas late in the season sowings may be made in June and July, and preference should be given to quick-growing early varieties. Ground from which early crops of Cauliflower, Carrot, Cabbage, Potatoes, &c., have been removed is excellent for the purpose. In dry weather thoroughly saturate the trench with water before sowing, and keep the seedlings as cool as possible by screening them from the sun.
Staking.—This important operation must not be unduly deferred, as the plants are never wholly satisfactory when once the stems have become bent. Commence by carefully earthing up the rows as soon as the plants are about three inches high. In the case of early varieties, light bushy sticks of the required height, thinly placed on both sides of the row, will suffice. Maincrop and late Peas, however, should first be staked with bushy twigs about eighteen inches high, these to be supplemented with sticks at least one foot taller than the variety apparently needs, as most Peas exceed their recognised height in the event of a wet season. No attempt should be made to construct an impenetrable fence, for Peas need abundance of light and air. Neither should the stakes be arched at the top, but placed leaning outwards.