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

A way of making a decision about when it's possible to plant schizanthus is to look at the USDA zone info for Massena.

Planting Calendar for Schizanthus

Frost tolerance for schizanthus:	Not tolerant of frost.
When to plant:	After the last frost.

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

The earliest that you can plant schizanthus in Massena 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. Any later than that and your schizanthus may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your schizanthus indoors.

Last Frost Date

The average date of last frost is May 15 in Massena. It might get as low as -25°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Massena and it can change quite a bit from year to year. Half of the time in Massena it frosts late in the year after May 15 so just be sure to be ready to cover your schizanthus in the event of a late frost.

USDA Zone Info for Massena

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Massena

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