When to Plant Scarlet Pimpernels in Zone 4b

The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Zone 4b you can estimate when you can plant scarlet pimpernels by referring to the USDA zone info.

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Planting Calendar for Scarlet Pimpernels

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

Since scarlet pimpernels do ok in moderate cold you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

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

The earliest that you can plant scarlet pimpernels in Zone 4b is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant scarlet pimpernels and expect a good harvest is probably August. You probably don't want to wait any later than that or else your scarlet pimpernels may not have a chance to really do well. Starting your scarlet pimpernels indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Zone 4b. It might get as low as -25°F during the coldest months of winter.

Always keep in mind that USDA zone info for Zone 4b is just an average and the actual date of last frost will vary from year to year. Half of the time in Zone 4b there is a last frost after May 15 so be sure to be ready to cover your scarlet pimpernels in the event of a surprise late frost.

USDA Zone Info for Zone 4b

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-25°F
Highest Expected Low-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Zone 4b

You may be interested in your other planting guides for Zone 4b.