When to Plant Yarrow in Ambler, PA

Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The best time to plant yarrow in Ambler can be estimated by checking out the USDA zone info.


Planting Calendar for Yarrow

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

You can plant yarrow quite a bit earlier in the year because they are very cold tolerant.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant yarrow
Possibly ok, but a risky time to plant yarrow
Probably not a good time to plant yarrow

The earliest that you can plant yarrow in Ambler 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 yarrow and expect a good harvest is probably September. If you wait any later than that and your yarrow may not have a chance to fully mature. If you are starting your yarrow indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Ambler the average date of last frost happens on April 15. You should expect an average low temperature of 0°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Ambler is not always accurate and the actual date of last frost is different every year. Since half of the time in Ambler there is a last frost after April 15 be ready to protect your yarrow if you have a late frost.

USDA Zone Info for Ambler

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 Low0°F
Highest Expected Low5°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 Ambler

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