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 estimating when it's possible to plant geranium is to consult the USDA zone info for Cupertino.

Planting Calendar for Geranium

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

It's a bad idea to plant geranium until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant geranium in Cupertino 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 little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Cupertino. It might get as low as 25°F during the coldest months of winter.

Keep in mind that USDA zone info for Cupertino is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Cupertino last frost occurs after February 15 be ready to protect your geranium in the event of a late frost.

USDA Zone Info for Cupertino

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 Cupertino

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