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

You can determine when it's possible to plant brussels sprouts in Sammamish by using the USDA zone info.

Planting Calendar for Brussels Sprouts

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

Brussels Sprouts do ok in moderate cold which tells us that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant brussels sprouts in Sammamish 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 brussels sprouts and expect a good harvest is probably September. You probably don't want to wait any later than that or else your brussels sprouts may not have a chance to grow to maturity. Starting your brussels sprouts indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Sammamish. It might get as low as 15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Sammamish is not always accurate and the actual date of last frost is different every year. Since half of the time in Sammamish last frost occurs after March 15 be ready to protect your brussels sprouts if you have a surprise late frost.

USDA Zone Info for Sammamish

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 Sammamish

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