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.

You can determine when it's possible to plant achillea in Trinidad by checking out the USDA zone info.

Planting Calendar for Achillea

Frost tolerance for achillea:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since achillea do well in cold you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant achillea in Trinidad 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 achillea and expect a good harvest is probably September. Any later than that and your achillea may not have a chance to fully mature. You can get started a little bit earlier by starting your achillea indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Trinidad. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Trinidad is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Trinidad it frosts late in the year after April 15 so just be sure to be ready to cover your achillea if you have one of those late frosts.

USDA Zone Info for Trinidad

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 Trinidad

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