One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Willow Springs can be used to figure out when to plant lisianthus.

Planting Calendar for Lisianthus

Frost tolerance for lisianthus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably a bad idea to plant lisianthus until after the last frost because they require warm weather.

The earliest that you can plant lisianthus in Willow Springs 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 lisianthus and expect a good harvest is probably August. If you wait any later than that and your lisianthus may not have a chance to really do well. You can get started a couple of weeks earlier by starting your lisianthus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Willow Springs. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Willow Springs is an average and the actual date of last frost is different every year. Since half of the time in Willow Springs last frost occurs after April 15 be ready to protect your lisianthus if you have a surprise late frost.

USDA Zone Info for Willow Springs

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Willow Springs

You may be interested in your other planting guides for Willow Springs.