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 looking at the USDA zone info for Sulphur it's possible to estimate when you can plant browallia.

Planting Calendar for Browallia

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

Since browallia are not cold tolerant it is necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant browallia in Sulphur 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 browallia and expect a good harvest is probably September. Any later than that and your browallia may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your browallia indoors.

Last Frost Date

On average the last frost is on February 15 in Sulphur. You can expect an average low temperature of 20°F in the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Sulphur and it can change quite a bit from year to year. Since half of the time in Sulphur last frost occurs after February 15 be ready to protect your browallia if you have a surprise late frost.

USDA Zone Info for Sulphur

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Sulphur

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