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.

In Humble you can estimate when it's a good idea to plant xerianthemum by checking out the USDA zone info.

Planting Calendar for Xerianthemum

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

Since xerianthemum are one of those plants that can tolerate a tiny bit of cold weather you can plant them a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant xerianthemum in Humble is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant xerianthemum and expect a good harvest is probably September. Any later than that and your xerianthemum may not have a chance to grow to maturity. You can get started a little bit earlier by starting your xerianthemum indoors.

Last Frost Date

The average date of last frost is February 15 in Humble. It might get as low as 20°F during the coldest months of winter.

Always keep in mind that USDA zone info for Humble is an average and the actual date of last frost is different every year. Since half of the time in Humble it frosts late in the year after February 15 be ready to protect your xerianthemum if you have a surprise late frost.

USDA Zone Info for Humble

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 Humble

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