Garlic seed is rarely produced. Sets are small onions halted in development by being grown very thickly from seed and ripened off early in the season. When planted the following spring, they resume their growth and produce mature bulbs earlier than direct seeded onions of the same variety. Top set onions are little bulbuls that appear on the flower cluster in the place of flowers and are handled in the same way as sets. Rhubarb is a perennial plant, usually propagated by division of the fleshy roots, small pieces of which will grow if separated from the old established roots and planted in rich soil.
Planting is typically in the spring.
To the knowledge of the NOSB, sources of potatoes produced organically for seed are scarce, particularly because of the strict phytosanitary requirements of various State seed certification programs which encourage post-harvest use of fungicide and other prohibited materials prior to storage. Commercial strawberry producers usually set nursery-grown plants. Although strawberries are perennial plants, in California and most southern States, strawberries are planted in the fall and will produce their first crop the following spring, about six months from planting. To the knowledge of the NOSB, organically produced strawberry crowns are not commercially available, particularly because in many areas they must be certified disease-free by county or State order which necessitates fumigation. Sweet potato slips and vine cuttings must be organically produced.