Peas thrive in cool, moist weather. Early plantings normally produce larger yields than later plantings. Peas may be planted whenever the soil temperature is at least 45°F. Plantings of heat-tolerant varieties can be made in midsummer to late summer, to mature during cool fall days. Allow more days to the first killing frost than the listed number of days to maturity because cool fall days do not speed development of the crop as do the long, bright days of late spring.
Plant peas 1 to 1-1/2 inches deep and one inch apart in single or double rows. Allow 18 to 24 inches between single or pairs of rows. Allow 8 to 10 inches between double rows in pairs.
Water the peas after planting and keep them moist, but make sure you don’t over-water the plants. They don’t like too moist conditions. But once the plants start to grow, give them some extra water since the plant development will need more moisture at this point in time. The peas will be ready for harvest about three weeks after you see the first few flowers. The plants should be fertilized about once a month with any fertilizer with a low nitrogen content.
Give the peas something they can climb on, usually you can build a small fence with chicken wire, or use climbing guides from a gardening center. Guide the young plants towards the support structure as soon as they are starting to develop long enough shoots to climb. This will keep the vines free from dirt and too much moisture, which will cause the pea plants to rot.
Garden Peas
When the pea pods are swollen (appear round) they are ready to be picked. Pick a few pods every day or two near harvest time to determine when the peas are at the proper stage for eating. Peas are of the best quality when they are fully expanded but immature, before they become hard and starchy. Peas should be picked immediately before cooking because their quality, especially sweetness (like that of sweet corn), deteriorates rapidly. The pods on the lower portion of the plant mature earliest. The last harvest (usually the third) is made about one week after the first. Pulling the entire plant for the last harvest makes picking easier.
Sugar Snap Peas
Snap peas should be harvested every 1 or 3 days, similarly to snow peas to get peak quality. Sugar snaps are at their best when the pods first start to fatten but before the seeds grow very large. At this point, the pods snap like green beans and the whole pod can be eaten. Some varieties have strings along the seams of the pod that must be removed before cooking. Sugar snaps left on the vine too long begin to develop tough fiber in the pod walls. These must then be shelled and used as other garden peas, with the fibrous pods discarded. Vining types of both sugar snap and snow peas continue to grow taller and produce peas as long as the plant stays in good health and the weather stays cool.
Snow Peas
These varieties are generally harvested before the individual peas have grown to the size of BBS, when the pods have reached their full length but are still quite flat. This stage is usually reached 5 to 7 days after flowering. Snow peas must be picked regularly (at least every other day) to assure sweet, fiber-free pods. Pods can be stir-fried, steamed or mixed with oriental vegetables or meat dishes. As soon as overgrown pods missed in earlier pickings are discovered, remove them from the plants to keep the plants blooming and producing longer. Enlarging peas inside these pods may be shelled and used as garden peas. Fat snow pea pods (minus the pea enlarging inside) should be discarded. Fibers that develop along the edges of larger pods, along with the stem and blossom ends, are removed during preparation. Pea pods lose their crispness if overcooked. The pods have a high sugar content and brown or burn quickly. Do not stir-fry over heat that is too intense.
Pea pods can be stored in a plastic bag in the refrigerator for two weeks. Unlike fresh green peas, pea pods deteriorate only slightly in quality when stored.