The USDA Zone info is a great tool for gardeners to help us determine 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 first opportunity to plant endive in Zone 4a can be estimated by referring to the USDA zone info.

Planting Calendar for Endive

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

Endive do well in a little bit of cold which tells us that you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant endive in Zone 4a is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant endive and expect a good harvest is probably August. Any later than that and your endive may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your endive indoors.

Last Frost Date

The average date of last frost is May 15 in Zone 4a. You can expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Zone 4a may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Zone 4a it frosts late in the year after May 15 be ready to cover your endive in the event of a surprise late frost.

USDA Zone Info for Zone 4a

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Zone 4a

You may be interested in your other planting guides for Zone 4a.