One of the best tools that you have as gardeners to help us figure out 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.

The first chance to plant hibiscus in Hillsborough can be figured out by using the USDA zone info.

Planting Calendar for Hibiscus

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

Since hibiscus are not cold tolerant it's important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant hibiscus in Hillsborough is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant hibiscus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your hibiscus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your hibiscus indoors.

Last Frost Date

The average date of last frost is April 15 in Hillsborough. You can expect an average low temperature of 5°F in the coldest months of winter.

Since the USDA zone info for Hillsborough may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Hillsborough you get a frost after April 15 so always be ready to protect your hibiscus if you have a late frost.

USDA Zone Info for Hillsborough

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Hillsborough

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