Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of figuring out when it's a good idea to plant bougainvillea is to consult the USDA zone info for Romulus.

Planting Calendar for Bougainvillea

Frost tolerance for bougainvillea:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

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

The earliest that you can plant bougainvillea in Romulus 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. If you wait 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 April 15 in Romulus. You can expect an average low temperature of -10°F in the coldest months of winter.

Always keep in mind that USDA zone info for Romulus may not be accurate from year to year and the actual date of last frost changes from year to year. Since half of the time in Romulus 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 Romulus

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 Romulus

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