One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can estimate when you can plant jerusalem artichokes in Happy Valley by reviewing the USDA zone info.

Planting Calendar for Jerusalem artichokes

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

Since jerusalem artichokes are one of those plants that can tolerate a little bit of cold weather you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant jerusalem artichokes in Happy Valley 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 jerusalem artichokes and expect a good harvest is probably September. You probably don't want to wait any later than that or else your jerusalem artichokes may not have a chance to fully mature. Starting your jerusalem artichokes indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

It's important to remember that USDA zone info for Happy Valley is an average and the actual date of last frost will vary from year to year. Half of the time in Happy Valley there is a last frost after March 15 so make sure that you are prepared to cover your jerusalem artichokes if you have a surprise late frost.

USDA Zone Info for Happy Valley

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 Happy Valley

You may be interested in your other planting guides for Happy Valley.