When to Plant Pyrethrum in Hellertown, 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.

It's possible to figure out when to plant pyrethrum by checking out the USDA zone info for Hellertown.


Planting Calendar for Pyrethrum

Frost tolerance for pyrethrum: Tolerant of some frost.
When to plant: Up to 5 weeks before last frost.

Pyrethrum tend to make it in mild cold which tells us that you can plant them a bit earlier in the year than other frost tender plants.

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

The earliest that you can plant pyrethrum in Hellertown 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 pyrethrum and expect a good harvest is probably September. You probably don't want to wait any later than that or else your pyrethrum may not have a chance to really do well. Starting your pyrethrum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Hellertown. It might get as low as -5°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Hellertown is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Hellertown it frosts late in the year after April 15 so make sure that you are prepared to protect your pyrethrum in the event of one of those late frosts.

USDA Zone Info for Hellertown

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-5°F
Highest Expected Low0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Hellertown

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