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.

It's possible to estimate when it's a good idea to plant sweet sultan by looking at the USDA zone info for Honolulu.

Planting Calendar for Sweet Sultan

Frost tolerance for sweet sultan:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Sweet Sultan do ok in moderate cold which means that you can get them planted just a bit earlier than more sensitive plants.

The earliest that you can plant sweet sultan in Honolulu is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant sweet sultan and expect a good harvest is probably November. You probably don't want to wait any later than that or else your sweet sultan may not have a chance to really do well. If you are starting your sweet sultan indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Honolulu it never frosts. In the coldest months of winter you can expect an average low temperature of 50°F.

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Honolulu and it is different every year. Since it never frosts in Honolulu you do not have to be ready to cover your sweet sultan if you have a late frost.

USDA Zone Info for Honolulu

Here is the info for USDA Zone 12a.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	50°F
Highest Expected Low	55°F

This means that on a really cold year, the coldest it will get is 50°F. On most years you should be prepared to experience lows near 55°F.

Plants to Grow in Honolulu

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