3210 - Bloomsdale Longstanding Spinach. classic, savoy-leafed spinach has tasty, thick, dark- green leaves. Grows well in spring or fall and can overwinter if protected with mulch. Dependable and cold hardy. Direct seed in early spring, as soon as the soil can be worked, for a spring crop, and in August for harvest in the late fall. Enrich soil well with mature compost. Harvesting tips. Harvest leaves or the whole plant before it goes to seed.