When can I plant Schizanthus in Zone 5a

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The USDA zone info for Zone 5a should be looked at to figure out when to plant schizanthus.


Planting Calendar for Schizanthus

Frost tolerance for schizanthus: Not tolerant of frost.
When you should plant them: After the last frost has passed.

It's probably not a good idea to plant schizanthus until after the last frost has passed because they require warm weather.

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

The earliest that you can plant schizanthus in Zone 5a 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 schizanthus and expect a good harvest is probably August. Any later than that and your schizanthus may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your schizanthus indoors.

Last Frost Date

The average date of last frost is April 15 in Zone 5a. We should expect an average low temperature of -20°F in the coldest months of winter.

Always keep in mind that USDA zone info for Zone 5a is an average and our actual date of last frost changes from year to year. Since half of the time in Zone 5a we get surprised by a frost after April 15 be ready to cover your schizanthus if we have a surprise late frost.

USDA Zone Info for Zone 5a

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-20°F
Highest Expected Low-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Zone 5a

You may be interested in our other planting guides for Zone 5a.