Planting onion bulbs, also known as onion sets, should occur in the spring as soon as the ground can be worked.
Planting Onion Sets in Spring
Here's a breakdown of when to plant onion sets:
- Timing: Plant onion sets outdoors in the spring when the ground can be worked.
- Temperature: Ensure temperatures are not likely to drop below 28°F (-2°C). This typically falls in late March or April.
- Soil Temperature: If planting seeds, start them indoors about 6 weeks before transplanting outdoors. This means waiting until the soil temperature reaches at least 50°F.
Planting Options for Onions
There are two primary ways to start onions:
- Planting Onion Sets (Bulbs):
- Directly plant small bulbs in the garden.
- This method allows for an earlier harvest.
- Planting Onion Seeds:
- Start seeds indoors to get a head start.
- Transplant seedlings outdoors once the soil warms up.
Summary Table
| Planting Method | Time of Year | Soil Temperature | Description |
|---|---|---|---|
| Onion Sets | Spring (late March/April) | Above 28°F (-2°C) | Direct planting of small bulbs as soon as the soil can be worked. |
| Onion Seeds | Spring | Above 50°F (10°C) | Start indoors 6 weeks before transplanting when soil is warm enough. |
Practical Advice
- Soil Prep: Make sure your soil is well-drained before planting your onion sets or transplants.
- Weather Watch: Keep an eye on the forecast, and delay planting if late frost is expected.
By following these guidelines, you should have a successful onion growing season.
