The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when it's a good idea to plant geranium by reviewing the USDA zone info for San Jose.

Planting Calendar for Geranium

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

Geranium require warm weather which tells us that it is important to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant geranium in San Jose 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 geranium and expect a good harvest is probably September. Any later than that and your geranium may not have a chance to grow to maturity. Starting your geranium indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for San Jose may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in San Jose it frosts late in the year after February 15 be ready to cover your geranium if you have a surprise late frost.

USDA Zone Info for San Jose

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 San Jose

You may be interested in your other planting guides for San Jose.