Withhold water in the final 2 weeks. Other peas are ready as soon as the peas reach full size. Feel the pods to see when they are full. Some pea plants produce full-sized peas with edible pods, such as 'Sugar Snap'. Harvest as they reach 4 inches long and finger thickness.
Potatoes Harvest new potatoes when plants flower.
New potatoes are small and sweet, with a thin skin, but do not store well. For full-sized tubers that can be stored through the winter, harvest after the vines have yellowed and died back. Radishes Harvest when roots have enlarged, while they are sill crisp and succulent, before they become woody and split. You can pick as much as half the foliage on a spinach plant at one time. Spinach takes longer to mature in very cool weather, so take only a few leaves at a time from one plant.