Sow seeds directly (outside) anytime 5/1-9/1, ¼” deep, 1-2” apart in rows spaced 12-18” apart. Slow to germinate, especially in cooler temperatures. Plants will over-winter and will divide to grow in clusters when plants start growing again in Spring. Clumps can be divided in second year or harvested. Be sure to keep patch well weeded, as scallions are not strong competitors.
Harvest greens anytime by cutting. To harvest whole plants, dig and remove. To grow as a perennial plant, divide plants during harvest and re-plant some whole plants.
Scallions are biennial, and will form flowering seed heads in the second summer after planting. Once the seed heads start drying, harvest into bag and bring inside to finish drying. Separate seeds from chaff by shaking bag or threshing seed heads. Winnow to separate seeds from chaff. Store seeds only once fully dry. Minimum population 5 plants, 20-50 being more ideal. Isolation distance 800 ft.