Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when it's the best time to plant bishop's weed by checking out the USDA zone info for Gresham.

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.

Bishop's Weed do well in cold which tells us that you can get them planted much earlier than more sensitive plants.

The earliest that you can plant bishop's weed in Gresham 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 bishop's weed and expect a good harvest is probably September. If you wait any later than that and your bishop's weed may not have a chance to grow to maturity. Starting your bishop's weed indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is March 15 in Gresham. It might get as low as 15°F during the coldest months of winter.

Always keep in mind that USDA zone info for Gresham is just an average and the actual date of last frost changes from year to year. Half of the time in Gresham last frost occurs after March 15 so make sure that you are ready to protect your bishop's weed in the event of one of those late frosts.

USDA Zone Info for Gresham

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Gresham

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