One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant nigella in Sharon Hill can be figured out by referring to the USDA zone info.

Planting Calendar for Nigella

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

Since nigella are very cold tolerant you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant nigella in Sharon Hill 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 nigella and expect a good harvest is probably September. Any later than that and your nigella may not have a chance to grow to maturity. If you are starting your nigella indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Sharon Hill. In the coldest months of winter you should expect an average low temperature of 5°F.

Remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Sharon Hill and it can change quite a bit from year to year. Half of the time in Sharon Hill you get surprised by a frost after April 15 so make sure that you are prepared to cover your nigella if you have a late frost.

USDA Zone Info for Sharon Hill

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Sharon Hill

You may be interested in your other planting guides for Sharon Hill.