One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant onions in Poolesville can be figured out by using the USDA zone info.

Planting Calendar for Onions

Frost tolerance for onions:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since onions do well in cold you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant onions in Poolesville is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant onions and expect a good harvest is probably September. If you wait any later than that and your onions may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your onions indoors.

Last Frost Date

The average date of last frost is April 15 in Poolesville. You can expect an average low temperature of 0°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Poolesville is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Poolesville there is a last frost after April 15 so be sure to be ready to protect your onions if you have a late frost.

USDA Zone Info for Poolesville

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Poolesville

You may be interested in your other planting guides for Poolesville.