500 seeds - Texas Grano 1015Y - Onion Seeds,Allium cepa. ,Spring,Summer or Fall,Short day! 500 seeds - Texas Grano 1015Y - Onion Seeds,Allium cepa. ,Spring,Summer or Fall,Short day! Texas Grano Onion Germination: Since onions take a few months to mature from seed, gardeners with a short growing season may want to start their seed indoors. Plant the seeds 1/2" deep in a flat 2-3 months before the last frost date; keep the soil moist and at room temperature. When the tops begin to flop over, cut them off to 3" to focus the growing on the roots. Four weeks before the last frost or when the soil reaches at least 50 degrees F, transplant the seedlings 6" apart in rows 12" apart. For direct sowing, sow three seeds per inch 1/2" deep in light, rich soil and full sun. Thin the seedlings 2-6" apart, depending on the desired size. Thinned onions can be transplanted or used for fresh eating. For companion planting benefits, plant onions with members of the cabbage family, lettuce, or tomatoes; avoid planting onions with peas or beans. In areas with warmer winters, onions may be grown as a fall or winter crop. Growing Texas Grano Onion Seeds: Onions need moisture especially in their first several weeks of growth, and they cannot fight against weeds; mulching onions can help with both moisture and weed control. Texas Early Grano onions are quite disease resistant.