One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Snohomish you can figure out when you can plant trachelium by looking at the USDA zone info.

Planting Calendar for Trachelium

Frost tolerance for trachelium:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably a bad idea to plant trachelium until after all chance of frost has passed because they require warm weather.

The earliest that you can plant trachelium in Snohomish 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 trachelium and expect a good harvest is probably August. If you wait any later than that and your trachelium may not have a chance to really do well. You can get started a couple of weeks earlier by starting your trachelium indoors.

Last Frost Date

On average the last frost has passed is on March 15 in Snohomish. In the coldest months of winter you should expect an average low temperature of 15°F.

Since the USDA zone info for Snohomish may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Snohomish you get a frost after March 15 so make sure that you are ready to protect your trachelium in the event of a surprise late frost.

USDA Zone Info for Snohomish

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 Snohomish

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