When can I plant Schizanthus in Zone 3b

Before planting it is a good idea to find our USDA Zone info to determine our garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The USDA zone info for Zone 3b should be used to figure out when it's a good idea 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.

Since schizanthus do not do well in cold weather you need to wait until after the last frost before you can plant them.

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 3b is May. However, you really should wait until June 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. If you wait any later than that and your schizanthus may not have a chance to really do well. Starting your schizanthus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Zone 3b. It might get as low as -35°F during the coldest months of winter.

Remember that our actual date of last frost is an average because it is based on the USDA zone info for Zone 3b and it will vary from year to year. Half of the time in Zone 3b we get a frost after May 15 so always be ready to cover your schizanthus in the event of a late frost.

USDA Zone Info for Zone 3b

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-35°F
Highest Expected Low-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Zone 3b

You may be interested in our other planting guides for Zone 3b.