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.

The USDA zone info for Chehalis should be reviewed to determine when it's possible to plant basil.

Planting Calendar for Basil

Frost tolerance for basil:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since basil require warm weather you have to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant basil in Chehalis 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 basil and expect a good harvest is probably August. Any later than that and your basil may not have a chance to grow to maturity. You can get started a little bit earlier by starting your basil indoors.

Last Frost Date

The average date of last frost is March 15 in Chehalis. It might get as low as 10°F during the coldest months of winter.

It's important to remember that USDA zone info for Chehalis is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Chehalis it frosts late in the year after March 15 be ready to protect your basil if you have a surprise late frost.

USDA Zone Info for Chehalis

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Chehalis

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