The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of estimating when it's the best time to plant flax is to use the USDA zone info for South Burlington.

Planting Calendar for Flax

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

Flax do ok in mild cold which tells us that you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant flax in South Burlington 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. If you wait any later than that and your flax may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your flax indoors.

Last Frost Date

In South Burlington the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -20°F.

Since the USDA zone info for South Burlington is an average the actual date of last frost is different every year. Half of the time in South Burlington you get a frost after April 15 so always be ready to protect your flax if you have a surprise late frost.

USDA Zone Info for South Burlington

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in South Burlington

You may be interested in your other planting guides for South Burlington.