One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to estimate when it's the best time to plant sweet woodruff by looking at the USDA zone info for Snoqualmie.

Planting Calendar for Sweet Woodruff

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

You can plant sweet woodruff a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant sweet woodruff in Snoqualmie 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 sweet woodruff and expect a good harvest is probably September. You probably don't want to wait any later than that or else your sweet woodruff may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your sweet woodruff indoors.

Last Frost Date

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

Since the USDA zone info for Snoqualmie is not always accurate the actual date of last frost will vary from year to year. Half of the time in Snoqualmie you get surprised by a frost after March 15 so make sure that you are prepared to cover your sweet woodruff if you have a surprise late frost.

USDA Zone Info for Snoqualmie

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 Snoqualmie

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