One of the first steps you take when you are making a decision about 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.

By checking out the USDA zone info for Sammamish you should be able to estimate when to plant creeping zinnia.

Planting Calendar for Creeping Zinnia

Frost tolerance for creeping zinnia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Creeping Zinnia do well in very little cold which tells us that you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant creeping zinnia in Sammamish is March. However, you really should wait until April if you don't want to take any chances.

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

Last Frost Date

The average date of last frost is March 15 in Sammamish. You can expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Sammamish is an average the actual date of last frost changes from year to year. Half of the time in Sammamish you get a frost after March 15 so make sure that you are ready to cover your creeping zinnia in the event of a 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.