The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By looking at the USDA zone info for Waterville you will be able to estimate when it's the best time to plant xerianthemum.

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 barely cold tolerant you can plant them slightly earlier in the year than more sensitive plants.

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

The last month that you can plant xerianthemum and expect a good harvest is probably August. If you wait any later than that and your xerianthemum may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your xerianthemum indoors.

Last Frost Date

The average date of last frost is April 15 in Waterville. In the coldest months of winter you can expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Waterville is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Waterville it frosts late in the year after April 15 be ready to protect your xerianthemum if you have a surprise late frost.

USDA Zone Info for Waterville

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°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 -5°F.

Plants to Grow in Waterville

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