Onion Growing Info
Learning Download: How to Grow Onions
When to Plant:
Direct sow seeds as soon as the soil can be worked in the spring. Onion seeds can be started indoors 3-4 weeks before soil can be worked.
Light:
Bulbing onions are dependent on day length for bulb production; short-day onions produce bulbs when they receive 11-12 hours of daylight are best for Southern states, long-day onions need 14-16 hours are best for Northernstates.
Fertilizing:
Use a 10-5-5 fertilizer or something similar. Onions like a lot of Nitrogen.
| Location: | Planting Depth: | Soil Type: |
| Full Sun | 1/8-1/4″ | Well drained,fertile soil, pH 6.2-6.8 |
| Seed Spacing | Row Spacing | Seeds per 100′ | Yield per 100′ | Seeds per Acre | |
| Onion | 3-6″ | 12-18′ | 400 | 100 lbs. | 175,000 |
Onion Seeds:
1 Ounce: 7,500 Seeds
1/8 Pound: 15,000 Seeds
1/4 Pound: 30,000 Seeds
1/2 Pound: 60,000 Seeds
1 Pound: 120,000 Seeds
* These are average onion seed counts. Varieties can vary.
Space Conversion:
1 Acre = 43,560 square feet, or 435’x100′
Weight Conversion:
1 Pound = 16 Ounces
1 Ounce = 28.4 Grams
