One of the first steps you take when you are estimating your gardening schedule is find your 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 earliest that you can plant lavender cotton in Portsmouth can be determined by checking out the USDA zone info.

Planting Calendar for Lavender Cotton

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

Lavender Cotton do well in cold which tells us that you can plant them much earlier than plants that are more sensitive to the cold.

The earliest that you can plant lavender cotton in Portsmouth 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 lavender cotton and expect a good harvest is probably September. Any later than that and your lavender cotton may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your lavender cotton indoors.

Last Frost Date

In Portsmouth the average date of last frost happens on April 15. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Portsmouth is just an average the actual date of last frost will vary from year to year. Since half of the time in Portsmouth it frosts late in the year after April 15 be ready to protect your lavender cotton in the event of one of those late frosts.

USDA Zone Info for Portsmouth

Here is the info for USDA Zone 6a.

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

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

Plants to Grow in Portsmouth

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