One of the best tools that you have as gardeners to help us determine 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.

It's a good idea to determine when it's possible to plant lisianthus by reviewing the USDA zone info for Plattsburgh.

Planting Calendar for Lisianthus

Frost tolerance for lisianthus:	Not tolerant of frost.
When to plant:	After the last frost has passed.

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

The earliest that you can plant lisianthus in Plattsburgh 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. Any later than that and your lisianthus may not have a chance to fully mature. Starting your lisianthus indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Plattsburgh the average date of last frost happens on April 15. In the coldest months of winter you can expect an average low temperature of -20°F.

Remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Plattsburgh and it will vary from year to year. Half of the time in Plattsburgh there is a last frost after April 15 so make sure that you are ready to cover your lisianthus in the event of a late frost.

USDA Zone Info for Plattsburgh

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 Plattsburgh

You may be interested in your other planting guides for Plattsburgh.