This section is from the book "The Gardener's Monthly And Horticulturist V24", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
I sow the seeds of the kinds I wish to grow in February or first of March, in small shallow boxes in forcing pit, hotbed, or if these are not to be had, a sunny window of the house will do. The boxes I use are eighteen by twenty, four inches, three inches deep ; made of one-half inch boards. The kinds of early cabbage I generally raise are Early Jersey, Wakefield (best if pure), Early Winningstadt, Early Summer and Fotler's Early Drumhead. The first two for early; the others for second early. I only treat the first two as above stated; the second early I sow in common hot-beds 1st to the 15th of March. After the seeds sown in boxes (say 15th of February) are up and about three inches high, it is necessary to transplant them in other boxes, like those they were sown in, about one and a half to two inches apart every way; or. if any wish to have them in small pots (two and a-half inch), put one plant in each pot, and pots close together in boxes, treating the same as if planted in boxes. Pots are better than boxes and I use them largely. About one week or ten days before planting in garden, they must be hardened off by exposing gradually, night and day, in open air.
I set out my plants from 15th of April to 1st of May. The plants which are in boxes are taken in the boxes to the part of the garden where the ground is ready to plant. Take a garden reel, stretch out straight, take plants out of boxes with care so that the soil will stay on the roots. Plant Wakefield twenty inches in rows and Early Summer the same; the other kinds twenty-four inches. The rows should be thirty inches apart, so that a cultivator can be used. Early radish, lettuce, spinach, etc., can be sown between the cabbage rows, and be out before the cabbage will need all the room. After cabbage, celery can be grown on the same ground. In this way other vegetable plants can be raised to advantage. In fact, I have raised all the following with great success: Early cauliflower, early lettuce, early kohl-rabi, early Savoy, early celery, early beets, early tomatoes, early cucumbers and early squashes.