One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant dill in Portsmouth should be determined by looking at the USDA zone info.

Planting Calendar for Dill

Frost tolerance for dill:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Dill can survive in very little cold which means that you can plant them a bit earlier in the year than other frost tender plants.

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

The last month that you can plant dill and expect a good harvest is probably August. You probably don't want to wait any later than that or else your dill may not have a chance to really do well. If you are starting your dill 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 Portsmouth. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Portsmouth is just an average the actual date of last frost changes from year to year. Half of the time in Portsmouth you get a frost after April 15 so just be sure to be ready to cover your dill if you have a surprise late frost.

USDA Zone Info for Portsmouth

Here is the info for USDA Zone 6b.

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

Plants to Grow in Portsmouth

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