The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The earliest that you can plant anchusa in Hayden should be estimated by looking at the USDA zone info.

Planting Calendar for Anchusa

Frost tolerance for anchusa:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant anchusa quite a bit earlier in the year because they are very cold tolerant.

The earliest that you can plant anchusa in Hayden 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 anchusa and expect a good harvest is probably September. If you wait any later than that and your anchusa may not have a chance to grow to maturity. Starting your anchusa indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on April 15 in Hayden. You can expect an average low temperature of -5°F in the coldest months of winter.

Remember that USDA zone info for Hayden is just an average and the actual date of last frost is different every year. Since half of the time in Hayden you get surprised by a frost after April 15 be ready to protect your anchusa in the event of one of those late frosts.

USDA Zone Info for Hayden

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Hayden

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