One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By checking out the USDA zone info for Cupertino it's a good idea to determine when to plant tropical hibiscus.

Planting Calendar for Tropical Hibiscus

Frost tolerance for tropical hibiscus:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since tropical hibiscus are not cold tolerant you must wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant tropical hibiscus 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 tropical hibiscus and expect a good harvest is probably September. You probably don't want to wait any later than that or else your tropical hibiscus may not have a chance to really do well. You can get started a little bit earlier by starting your tropical hibiscus indoors.

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.

Just be sure to remember 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 it frosts late in the year after February 15 be ready to cover your tropical hibiscus if you have a surprise 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.