When can I plant Lisianthus in Zone 1a

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.

By referring to the USDA zone info for Zone 1a you should be able to figure out when to plant lisianthus.


Planting Calendar for Lisianthus

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

It's not a good idea to plant lisianthus until after the last frost because they do not do well in cold weather.

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

The earliest that you can plant lisianthus in Zone 1a 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 lisianthus and expect a good harvest is probably July. You probably don't want to wait any later than that or else your lisianthus may not have a chance to really do well. If you are starting your lisianthus indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Zone 1a the average date of last frost happens on June 15. It might get as low as -60°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Zone 1a is just an average and our actual date of last frost is different every year. Half of the time in Zone 1a we get a frost after June 15 so make sure that you are ready to protect your lisianthus in the event of a late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in our other planting guides for Zone 1a.