The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to estimate when you can plant bougainvillea by checking out the USDA zone info for Sunnyvale.

Planting Calendar for Bougainvillea

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

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

The earliest that you can plant bougainvillea in Sunnyvale 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. You probably don't want to wait any later than that or else your bougainvillea may not have a chance to really do well. If you are starting your bougainvillea indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Sunnyvale. In the coldest months of winter you should expect an average low temperature of 25°F.

Always keep in mind that USDA zone info for Sunnyvale may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Sunnyvale you get a frost after February 15 so always be ready to cover your bougainvillea in the event of a surprise late frost.

USDA Zone Info for Sunnyvale

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°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 30°F.

Plants to Grow in Sunnyvale

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