One of the first steps you take when you are determining your gardening schedule is find your 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.

The first opportunity to plant bougainvillea in New Haven can be determined by referring to the USDA zone info.

Planting Calendar for Bougainvillea

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

It's a bad idea to plant bougainvillea until after the last frost has passed because they require warm weather.

The earliest that you can plant bougainvillea 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 bougainvillea and expect a good harvest is probably August. Any later than that and your bougainvillea may not have a chance to fully mature. You can get started a little bit earlier by starting your bougainvillea indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in New Haven. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for New Haven may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in New Haven it frosts late in the year after April 15 be ready to protect your bougainvillea in the event of a late frost.

USDA Zone Info for New Haven

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°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.