Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to figure out when it's a good idea to plant tropical hibiscus by reviewing the USDA zone info for Hilton Head Island.

Planting Calendar for Tropical Hibiscus

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

It's probably not a good idea to plant tropical hibiscus until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant tropical hibiscus in Hilton Head Island 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 tropical hibiscus and expect a good harvest is probably August. If you wait any later than that and your tropical hibiscus may not have a chance to grow to maturity. If you are starting your tropical hibiscus indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Hilton Head Island the average date of last frost happens on March 15. You should expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Hilton Head Island may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Hilton Head Island there is a last frost after March 15 be ready to cover your tropical hibiscus in the event of a surprise late frost.

USDA Zone Info for Hilton Head Island

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Hilton Head Island

You may be interested in your other planting guides for Hilton Head Island.