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 first chance to plant bishop's weed in Green River can be estimated by looking at 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 do well in cold you can plant them earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant bishop's weed in Green River is March. However, you really should wait until April 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 August. If you wait any later than that and your bishop's weed may not have a chance to fully mature. You can get started a little bit earlier by starting your bishop's weed indoors.

Last Frost Date

The average date of last frost is May 15 in Green River. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Green River is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Green River you get surprised by a frost after May 15 be ready to protect your bishop's weed in the event of one of those late frosts.

USDA Zone Info for Green River

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 Green River

You may be interested in your other planting guides for Green River.