Notes on Bulbing Onions: Onions are best planted from seed vs. bulbs. Start seed indoor in January so that bulb can mature around Summer Solstice time. Bulbs need long days to form. Start with Nitrogen fertilizer to get the greens growing vigorously, then cut back so bulb can form.
The sowing and transplanting dates
are based on zone 5 guidelines and
actual experience in our
Santa Fe , New Mexico garden.