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.

The earliest that you can plant pyrethrum in Winchester can be determined by checking out the USDA zone info.

Planting Calendar for Pyrethrum

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

Pyrethrum do well in moderate cold which tells us that you can plant them earlier than other frost tender plants.

The earliest that you can plant pyrethrum in Winchester 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 really do well. Starting your pyrethrum indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Winchester. In the coldest months of winter you should expect an average low temperature of 0°F.

Since the USDA zone info for Winchester is just an average the actual date of last frost is different every year. Half of the time in Winchester it frosts late in the year after April 15 so make sure that you are prepared to protect your pyrethrum in the event of a surprise late frost.

USDA Zone Info for Winchester

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Winchester

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