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

In Snoqualmie you can estimate when it's possible to plant anchusa by referring to the USDA zone info.

Planting Calendar for Anchusa

Frost tolerance for anchusa:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since anchusa do well in cold you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant anchusa in Snoqualmie 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 anchusa and expect a good harvest is probably September. If you wait any later than that and your anchusa may not have a chance to fully mature. Starting your anchusa indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on March 15 in Snoqualmie. In the coldest months of winter you can expect an average low temperature of 15°F.

Keep in mind that USDA zone info for Snoqualmie is an average and the actual date of last frost changes from year to year. Since half of the time in Snoqualmie there is a last frost after March 15 be ready to protect your anchusa if you have a surprise late frost.

USDA Zone Info for Snoqualmie

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 Snoqualmie

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