Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of determining when to plant flax is to refer to the USDA zone info for Caldwell.

Planting Calendar for Flax

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

You can plant flax a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant flax in Caldwell 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 flax and expect a good harvest is probably September. Any later than that and your flax may not have a chance to really do well. Starting your flax indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Caldwell. In the coldest months of winter you should expect an average low temperature of -5°F.

Since the USDA zone info for Caldwell is an average the actual date of last frost is different every year. Half of the time in Caldwell it frosts late in the year after April 15 so be sure to be ready to cover your flax if you have a surprise late frost.

USDA Zone Info for Caldwell

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 Caldwell

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