Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In New Haven you can figure out when it's possible to plant schizanthus by checking out 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 do not do well in cold weather you really should wait until after the last frost before you can plant them.

The earliest that you can plant schizanthus in New Haven 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 schizanthus and expect a good harvest is probably August. Any later than that and your schizanthus may not have a chance to fully mature. If you are starting your schizanthus indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in New Haven. You can expect an average low temperature of 0°F in the coldest months of winter.

Always keep in mind that USDA zone info for New Haven is not always accurate and the actual date of last frost is different every year. Half of the time in New Haven you get a frost after April 15 so just be sure to be ready to cover your schizanthus in the event of a surprise late frost.

USDA Zone Info for New Haven

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in New Haven

You may be interested in your other planting guides for New Haven.