One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By using the USDA zone info for Dillon you should be able to determine when it's possible to plant pyrethrum.

Planting Calendar for Pyrethrum

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

Pyrethrum tend to make it in moderate cold which tells us that you can plant them a little bit earlier in the year than more sensitive plants.

The earliest that you can plant pyrethrum in Dillon 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. Any later than that and your pyrethrum may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your pyrethrum indoors.

Last Frost Date

The average date of last frost is March 15 in Dillon. In the coldest months of winter you should expect an average low temperature of 10°F.

It's important to remember that USDA zone info for Dillon is not always accurate and the actual date of last frost is different every year. Half of the time in Dillon there is a last frost after March 15 so make sure that you are ready to protect your pyrethrum in the event of a late frost.

USDA Zone Info for Dillon

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 Dillon

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