When to Plant Schizanthus in Zone 1b

One of the best tools that you have as gardeners to help us determine 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 can estimate when you can plant schizanthus in Zone 1b by referring to the USDA zone info.


Planting Calendar for Schizanthus

Frost tolerance for schizanthus: Not tolerant of frost.
When to plant: After all chance of frost has passed.

Since schizanthus are not cold tolerant it is necessary to wait until after the last frost when the weather gets warmer 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 1b is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant schizanthus and expect a good harvest is probably July. If you wait any later than that and your schizanthus may not have a chance to fully mature. Starting your schizanthus indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is June 15 in Zone 1b. It might get as low as -55°F during the coldest months of winter.

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 1b and it can change quite a bit from year to year. Half of the time in Zone 1b it frosts late in the year after June 15 so just be sure to be ready to protect your schizanthus in the event of a late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.