When to Plant Bougainvillea in Stillwater, MN

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.

The earliest that you can plant bougainvillea in Stillwater should be estimated by checking out the USDA zone info.

Create beautiful hand-made plants at forever-plants.com

Planting Calendar for Bougainvillea

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

It's not a good idea to plant bougainvillea until after the last frost because they are not cold tolerant.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant bougainvillea
Possibly ok, but a risky time to plant bougainvillea
Probably not a good time to plant bougainvillea

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

Last Frost Date

The average date of last frost is May 15 in Stillwater. In the coldest months of winter you can expect an average low temperature of -25°F.

Since the USDA zone info for Stillwater is not always accurate the actual date of last frost is different every year. Half of the time in Stillwater you get surprised by a frost after May 15 so make sure that you are prepared to cover your bougainvillea if you have one of those late frosts.

USDA Zone Info for Stillwater

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 Stillwater

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