One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to figure out when it's possible to plant schizanthus by reviewing the USDA zone info for Seattle.

Planting Calendar for Schizanthus

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

Since schizanthus do not do well in cold weather it's important to wait until after the last frost before you can plant them.

The earliest that you can plant schizanthus in Seattle 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 schizanthus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your schizanthus may not have a chance to fully mature. If you are starting your schizanthus indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average all chance of frost has passed is on March 15 in Seattle. You can expect an average low temperature of 15°F in the coldest months of winter.

It's important to remember that USDA zone info for Seattle may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Seattle it frosts late in the year after March 15 so always be ready to cover your schizanthus in the event of one of those late frosts.

USDA Zone Info for Seattle

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 Seattle

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