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

You can estimate when it's possible to plant nasturtium in Sulphur by looking at the USDA zone info.

Planting Calendar for Nasturtium

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

It's a bad idea to plant nasturtium until after all chance of frost has passed because they require warm weather.

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

Last Frost Date

The average date of last frost is April 15 in Sulphur. In the coldest months of winter you should expect an average low temperature of 5°F.

Since the USDA zone info for Sulphur is just an average the actual date of last frost is different every year. Since half of the time in Sulphur last frost occurs after April 15 be ready to cover your nasturtium in the event of a surprise late frost.

USDA Zone Info for Sulphur

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 Sulphur

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