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 Grass Valley you can estimate when it's the best time to plant bougainvillea by checking out the USDA zone info.

Planting Calendar for Bougainvillea

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

Bougainvillea do not do well in cold weather which means that you have to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant bougainvillea in Grass Valley 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 grow to maturity. You can get started a little bit earlier by starting your bougainvillea indoors.

Last Frost Date

In Grass Valley the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 20°F.

Always keep in mind that USDA zone info for Grass Valley is an average and the actual date of last frost changes from year to year. Half of the time in Grass Valley last frost occurs after February 15 so just be sure to be ready to cover your bougainvillea in the event of one of those late frosts.

USDA Zone Info for Grass Valley

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 Grass Valley

You may be interested in your other planting guides for Grass Valley.