One of the first steps you take when you are estimating your gardening schedule is find your 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.

In Snohomish you can figure out when it's the best time to plant artichokes by reviewing the USDA zone info.

Planting Calendar for Artichokes

Frost tolerance for artichokes:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Artichokes do ok in mild cold which tells us that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant artichokes in Snohomish 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 artichokes and expect a good harvest is probably September. Any later than that and your artichokes may not have a chance to fully mature. If you are starting your artichokes indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Snohomish the average date of last frost happens on March 15. You should expect an average low temperature of 15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Snohomish may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Snohomish last frost occurs after March 15 so be sure to be ready to cover your artichokes 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.