Plan the perfect garden with our interactive tool →

What Happens to Collard Greens After the First Frost?

Brand X Pictures/Brand X Pictures/Getty Images

After the first frost, gardeners can kiss tender vegetables such as tomatoes, green beans, and zucchini, goodbye. A few hardy vegetables, though, not only survive, but thrive in cool temperatures. Collards are one of those vegetables. Although collards are often thought of as a Southern crop, they grow admirably in all but the coldest climates, as well.

Hardiness

Collards grow best when temperatures are between 60 and 65 degrees Fahrenheit, and will bolt or become rough in hot weather. Summer planted collards tolerate light to medium frosts, allowing gardeners to continue to grow them well into fall in most regions. Young collard plants grown in the spring are less tolerant of frosts.

Benefits

Fall collard greens allow gardeners to extend the growing season for two or three months in all but the coldest climates, and collards actually taste sweeter after a few light frosts. Fall-planted collards also suffer fewer diseases and pests and generally don't have problems with bolting due to hot weather.

Frost Protection

Although collards are naturally hardy vegetables that tolerate all but the heaviest frosts, you can extend the season by providing some frost protection. The simplest device is floating row covers -- lightweight agricultural fabric that lays directly over collards and provides protection from medium frosts. Floating row covers do not protect collards from the weight of heavy snows or heavy frosts. Hoop tunnels or cold frames offer more substantial frost protection and in most climates gardeners can grow collards through most of the winter.

  • Collards grow best when temperatures are between 60 and 65 degrees Fahrenheit, and will bolt or become rough in hot weather.
  • Hoop tunnels or cold frames offer more substantial frost protection and in most climates gardeners can grow collards through most of the winter.

Recommendations

Plant collard greens in the spring as soon as the soil is soft enough to work and mid-summer -- six weeks before the first expected frost. Mulch plants with straw or untreated grass clippings to reduce weed growth, conserve water and provide some protection from cold temperatures. Provide more significant cold protection if you wish to prolong the growing season past late fall.

Related Articles

When to Plant Fall Vegetables in Zone 7
When to Plant Fall Vegetables in Zone 7
What Types of Vegetables Grow Above 3,000 Feet Elevation?
What Types of Vegetables Grow Above 3,000 Feet Elevation?
How Long Is the Oat Growing Season?
How Long Is the Oat Growing Season?
What Vegetables Can I Plant in September?
What Vegetables Can I Plant in September?
What Is the Difference Between Collards & Turnip Greens?
What Is the Difference Between Collards & Turnip Greens?
Which Vegetables Grow Best in North Carolina?
Which Vegetables Grow Best in North Carolina?
How to Grow Turnip Greens
How to Grow Turnip Greens
The Average Height of Vegetable Plants
The Average Height of Vegetable Plants
What Vegetables Grow in Texas?
What Vegetables Grow in Texas?
The Best Vegetables to Grow in New Jersey
The Best Vegetables to Grow in New Jersey
Arkansas Vegetable Planting Guide
Arkansas Vegetable Planting Guide
Georgia Winter Vegetable Garden
Georgia Winter Vegetable Garden
October Planting in East Tennessee
October Planting in East Tennessee
The Best Vegetables to Grow in New England
The Best Vegetables to Grow in New England
Can Snapdragons & Pansies Withstand a Winter Freeze?
Can Snapdragons & Pansies Withstand a Winter Freeze?
Garden Guides
×