Skip to product information
1 of 1

Red Grano Onion Seeds.

Red Grano Onion Seeds.

Regular price $2.49 USD
Regular price Sale price $2.49 USD
Sale Sold out
Shipping calculated at checkout.

Red Grano Onion Seeds | Short Day | Non-GMO | Heirloom| 300 Seeds |

Red Grano Onion Seeds Planting Guide


Red Grano onions are a cool-season crop, so they can be planted in the spring or fall. They are best grown in USDA zones 2-9.


Red Grano onions prefer well-drained soil with a pH of 6.0-7.0. If your soil is heavy clay, you can improve drainage by adding sand or compost.


  • To plant Red Grano onions from seed, sow the seeds 1/4 inch deep and 2 inches apart in rows 12-18 inches apart.
  • If you live in a short-season climate, you can start the seeds indoors 6-8 weeks before the last frost date in your area. Transplant the seedlings outdoors after the last frost date, spacing them 12-18 inches apart in rows 12-18 inches apart.


Onions need about 1 inch of water per week. Water the onions deeply, so that the water reaches the roots.


Onions are heavy feeders, so it is important to fertilize them regularly. Fertilize the onions every few weeks with a balanced fertilizer.


Red Grano onions are ready to harvest when the tops start to fall over and the bulbs are firm. This usually takes about 100-120 days after transplanting.


  • To prevent weeds, mulch around the onions with straw or compost.
  • Inspect the onions regularly for pests and diseases. Common pests and diseases of onions include onion thrips, onion maggots, and onion smut.
  • Harvest the onions when they are mature, but before the tops die completely.


Cured onions can be stored for several months in a cool, dry place. To cure onions, place them in a single layer in a cool, dry place for a few weeks.


View full details