The USDA Zone info is a great tool for gardeners to help us determine 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.

In Dumas you can figure out when you can plant astilbe by checking out the USDA zone info.

Planting Calendar for Astilbe

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

You can plant astilbe just a tiny bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant astilbe in Dumas 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 astilbe and expect a good harvest is probably August. Any later than that and your astilbe may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your astilbe indoors.

Last Frost Date

On average the last frost is on March 15 in Dumas. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Dumas may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Dumas you get a frost after March 15 be ready to protect your astilbe in the event of a surprise late frost.

USDA Zone Info for Dumas

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 Dumas

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