When to Plant Steirodiscus in Portsmouth, NH

One of the best tools that you have as gardeners to help us figure out 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.

You will be able to estimate when it's a good idea to plant steirodiscus by looking at the USDA zone info for Portsmouth.


Planting Calendar for Steirodiscus

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

Since steirodiscus do ok in moderate cold you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant steirodiscus
Possibly ok, but a risky time to plant steirodiscus
Probably not a good time to plant steirodiscus

The earliest that you can plant steirodiscus 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 steirodiscus and expect a good harvest is probably August. Any later than that and your steirodiscus may not have a chance to really do well. Starting your steirodiscus indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Always keep in mind that USDA zone info for Portsmouth is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Portsmouth you get a frost after April 15 so make sure that you are prepared to protect your steirodiscus if you have 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.