When to Plant Liatris in Norristown, PA

One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The earliest that you can plant liatris in Norristown can be estimated by referring to the USDA zone info.


Planting Calendar for Liatris

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

Liatris do well in quite a bit of cold which tells us that you can plant them earlier in the year than more sensitive plants.

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

The earliest that you can plant liatris in Norristown 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 liatris and expect a good harvest is probably September. Any later than that and your liatris may not have a chance to fully mature. Starting your liatris indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Norristown. You should expect an average low temperature of 0°F in the coldest months of winter.

Remember that USDA zone info for Norristown is just an average and the actual date of last frost changes from year to year. Since half of the time in Norristown you get a frost after April 15 be ready to cover your liatris if you have a late frost.

USDA Zone Info for Norristown

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 Norristown

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