When to Plant Bishop's Weed in Zone 1b

One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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 best time to plant bishop's weed in Zone 1b can be figured out by referring to the USDA zone info.


Planting Calendar for Bishop's Weed

Frost tolerance for bishop's weed: Very tolerant of frost.
When to plant: Up to 7 weeks before last frost.

Since bishop's weed are very cold tolerant you can plant them quite a bit earlier in the year than other frost tender plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant bishop's weed
Possibly ok, but a risky time to plant bishop's weed
Probably not a good time to plant bishop's weed

The earliest that you can plant bishop's weed in Zone 1b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant bishop's weed and expect a good harvest is probably July. If you wait any later than that and your bishop's weed may not have a chance to grow to maturity. If you are starting your bishop's weed indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is June 15 in Zone 1b. In the coldest months of winter you can expect an average low temperature of -55°F.

Since the USDA zone info for Zone 1b is an average the actual date of last frost changes from year to year. Half of the time in Zone 1b you get a frost after June 15 so be sure to be ready to cover your bishop's weed in the event of a surprise late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.