Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when it's a good idea to plant pyrethrum is to look at the USDA zone info for Rowlett.

Planting Calendar for Pyrethrum

Frost tolerance for pyrethrum:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Pyrethrum do ok in moderate cold which means that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant pyrethrum in Rowlett 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 pyrethrum and expect a good harvest is probably September. You probably don't want to wait any later than that or else your pyrethrum may not have a chance to fully mature. Starting your pyrethrum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on March 15 in Rowlett. You should expect an average low temperature of 10°F in the coldest months of winter.

Always keep in mind that USDA zone info for Rowlett is just an average and the actual date of last frost will vary from year to year. Half of the time in Rowlett you get surprised by a frost after March 15 so just be sure to be ready to cover your pyrethrum in the event of a surprise late frost.

USDA Zone Info for Rowlett

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Rowlett

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