One of the best tools that you have as gardeners to help us determine 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 common way of figuring out when it's possible to plant bougainvillea is to refer to the USDA zone info for Warrenton.

Planting Calendar for Bougainvillea

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

Since bougainvillea are not cold tolerant you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant bougainvillea in Warrenton is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant bougainvillea and expect a good harvest is probably September. If you wait any later than that and your bougainvillea may not have a chance to really do well. Starting your bougainvillea indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Warrenton. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Warrenton is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Warrenton there is a last frost after February 15 be ready to protect your bougainvillea in the event of a late frost.

USDA Zone Info for Warrenton

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

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

Plants to Grow in Warrenton

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