Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By looking at the USDA zone info for Washington it's a good idea to estimate when you can plant brachycome.

Planting Calendar for Brachycome

Frost tolerance for brachycome:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Brachycome are not cold tolerant which means that it's important to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

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

Last Frost Date

The average date of last frost is April 15 in Washington. In the coldest months of winter you can expect an average low temperature of -10°F.

Just be sure to remember that USDA zone info for Washington is just an average and the actual date of last frost changes from year to year. Since half of the time in Washington it frosts late in the year after April 15 be ready to cover your brachycome if you have one of those late frosts.

USDA Zone Info for Washington

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°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 -5°F.

Plants to Grow in Washington

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