When can I plant Nierembergia in Zone 7b

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

A way of figuring out when it's a good idea to plant nierembergia is to consult the USDA zone info for Zone 7b.


Planting Calendar for Nierembergia

Frost tolerance for nierembergia: Not tolerant of frost.
When you should plant them: After all chance of frost has passed.

Since nierembergia require warm weather you must wait until after the last frost when the weather gets warmer before you can plant them.

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

The earliest that you can plant nierembergia in Zone 7b is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant nierembergia and expect a good harvest is probably August. Any later than that and your nierembergia may not have a chance to fully mature. Starting your nierembergia indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Zone 7b the average date of last frost happens on April 15. In the coldest months of winter we should expect an average low temperature of 5°F.

Since the USDA zone info for Zone 7b is not always accurate our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 7b there is a last frost after April 15 be ready to protect your nierembergia in the event of a late frost.

USDA Zone Info for Zone 7b

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 Low5°F
Highest Expected Low10°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 Zone 7b

You may be interested in our other planting guides for Zone 7b.