Pack of 80 Onion Bulbs - Variety "Yellow Onions" Planting Tips: Plant bulbs fall through spring in full sun in fertile, well drained soil. To yield green onions - Plant bulbs 1/2" apart in rows and 2-3" deep To yield dry table onion - Plant bulbs 3" apart in rows 12" apart covered with 1/2" of soil. Harvest after top growth has fallen.