Peter Henderson's Gardening Calendar
from Gardening for Profit, 1866
APRIL—brings nearly all the operations of the garden under way, the planting and sowing of all the hardy varieties of vegetables is completed this month. Look well to the hot-beds, cold frames, or forcing pits; they will require abundance of air, and where artificial heat is used, plenty of water; we have now bright sunshine, promoting rapid vegetation under glass, and to have heavy crops, they must not be stinted in water. Hot-beds are particularly critical in this month; an hour or two of neglect, in giving air, may quickly scorch the tender plants that you have been nursing with so much care for a month previous; and a balmy April day may terminate in a stinging frost at night, making short work of your hot-beds if they are not well covered up by straw mats.
Plantations of Asparagus, Rhubarb, etc., if not made last month, should now be done, as those set out later than April, will not make such a vigorous growth. Succession crops of Lettuce, Beets, Cabbage, Onions, Peas, Potatoes, Radishes, Spinach, Turnips, etc., may be planted or sown during the latter part of the month, to succeed those planted in March and early part of April. The early sown crops should be hoed, and the ground stirred close to the young plants, so as to destroy the germ of the weeds now appearing.