How to Grow Collard Greens in the Fall

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How to grow collard greens in the fall starts with the calendar rather than the seed packet. The extension pages we opened give a simple method: take the days to maturity for your variety, add a margin, and count back from your first fall frost. The sources describe collards as hardy, but the timing still has to let the crop mature before the weather turns.

This post uses pages we opened on 2026-10-22. The NC State collard page is dated 2001 in its own text, and the post says so wherever it relies on that page. Where the sources give different sowing windows, the post shows each window and the place it applies to, instead of choosing one.

Quick answer

• Count back from your first fall frost. The University of Maryland guide adds 10 to 14 days to the time to maturity, then sows that many days before the frost date.
• Plant in late summer for a fall crop. Alabama lists mid-August through mid-September, and Pamlico County, North Carolina, gives July 15 to September 15 for its fall harvest.
• Thin the seedlings to 6 inches, then harvest whole plants so that 18 inches separates the rest, as the Illinois collard page describes.
• Strip the mature leaves and leave the growing tip in place. Pamlico County warns that removing the terminal bud drastically slows growth.

Count back from the first fall frost

The University of Maryland guide gives a worked example. A variety that takes 55 days to maturity is sown 65 to 69 days before the first fall frost, because the guide adds 10 to 14 days to the maturity figure for fall planting. The added margin is the guide’s own. For example, a variety with a 60-day time to maturity is sown 70 to 74 days before the first fall frost, and an 80-day variety is sown 90 to 94 days before it.

The arithmetic is short, but its inputs matter. Your variety’s days to maturity sets the base, and the seed packet or the catalog usually gives that figure. The first fall frost date is local, and none of the pages we opened gives a frost date, so you will need to look up your own before you count back.

Regional windows show the same logic in different places. Alabama’s collard guide gives two planting windows, February through mid-March and mid-August through mid-September. Pamlico County’s extension office says a fall harvest in its area requires starting seed or transplants between July 15 and September 15. The two windows overlap in late summer, which is the period both sources treat as the fall start.

The NC State collard page separates seed from transplants. It says to plant seeds in early spring or midsummer, and to plant transplants in early spring or late summer. The Illinois Extension collard page gives a similar two-step plan. It says to plant in early spring for summer harvest and again in midsummer for fall and early winter harvest. A midsummer sowing is therefore the common thread across these pages for a fall crop. Clemson Extension adds that direct seeding works well when planting in the late summer for a fall harvest, as the soil is much warmer at this time.

Why collards suit a fall bed

The University of Maryland guide describes collards as hardy. It says kale, collards and turnip are hardy enough to withstand heavy frosts in spring and fall. It also says collards are more heat-tolerant than kale or turnip greens, which matters for a bed sown while summer heat is still in the air.

The NC State collard page, which is dated 2001 in its own text, says a mature plant will withstand frosts and light to medium freezes. Clemson Extension says the same of mature plants. The NC State handbook puts collards in a wider cold-hardy group. It lists collards, kale, turnip greens, spinach and Swiss chard as crops that, planted in fall, may live through the winter or may go dormant and flourish again in early spring. A fall bed of collards therefore has two outcomes the sources describe: a harvest before the cold, or a winter that the plants survive to regrow in spring.

Flavor is the other reason fall suits greens. The University of Maryland guide says fall may be the preferable season for most leafy greens because they benefit from frost, which increases the sugar content and flavor of the leaves. The guide’s exception is collards. Its sentence on fall as the preferable season carries the qualifier “except for collards,” so for collards the guide does not name fall as the better season.

Where the sources disagree

The sources differ on whether fall is the best season for collards. The University of Maryland guide names fall as the preferable season for most leafy greens, but it makes an exception for collards. The Illinois collard page says collard grows better in warm weather and can tolerate more cold weather in the late fall than any other member of the cabbage family. Pamlico County’s office describes collards as a cool-season crop that grows better during the cooler temperatures of spring and fall. The NC State collard page calls them a cool-season crop that grows best during early spring or fall. Clemson Extension, writing for South Carolina, says early spring or fall production is generally preferred.

The practical step is the same under each reading. A midsummer sowing that finishes in cooler weather fits what Illinois recommends for a fall and early winter harvest, and it fits the late-summer windows that Alabama and Pamlico County give. This post does not settle which season is best for collards, because the sources do not agree on it.

Sow, space and thin the bed

The Illinois collard page gives the clearest spacing method in the pages we opened. It says to thin the seedlings to 6 inches apart, allow them to grow until they begin to touch, and then harvest whole plants to give 18 inches between plants. The same page says to allow at least 3 feet between rows, because plants become large.

The method is simple. You thin early, let the rows fill, and then remove whole plants until the remaining ones stand about 18 inches apart. The NC State collard page makes the same point from another angle: spacing depends on when the crop will be harvested. If plants will be harvested when young, the same page says to space the seeds 2 to 4 inches apart. For broader raised-bed options, see vegetables to plant in raised beds.

Clemson Extension gives a wider layout. It says to plant collards in rows 18 to 36 inches apart, and to space plants 6 to 18 inches apart on the row. Its upper figure matches the 18 inches that Illinois reaches after thinning. Clemson also says to plant seed in moist soil about one-quarter to one-half inch deep, and it warns that seed planted deeper than half an inch is unlikely to germinate. Alabama’s collard guide gives a different figure for a small site: 12 inches apart within rows, or one plant per 5- to 7-gallon container. For a pot, the container figure is the one that applies.

Harvest by the leaf, and protect the tip

Clemson Extension sets the harvest stage in days. It says collards should be ready for harvest 60 to 80 days after direct seeding, depending on the cultivar, and that entire plants may be cut when half-grown or full-grown. To extend the harvest, it says to break off individual leaves starting from the bottom of the plant and move up over time.

The Alabama guide sets the harvest timing. It says to harvest at 60 to 80 days, when outer leaves become 8 to 10 inches long. It also says to remove only one-third of the plant’s bottom lower leaves at a time.

The NC State collard page describes a different approach. It says to cut entire plants when very young, and that the plant will grow back and can be harvested multiple times. Both methods pick leaves, and the NC State page adds that the plant will grow back after a cut.

Pamlico County’s office gives the leaf method in detail. To harvest collards, strip mature leaves from the stalks of multiple plants, leaving the growing terminal bud and immature leaves behind. It also says the harvest can continue because new leaves are produced from the terminal bud, and it warns that removal of the terminal bud will drastically slow growth, resulting in low productivity. For a fall bed, the rule is simple: pick the mature outer leaves, and leave the tip alone.

For a companion layout that keeps the taller plants out of the way of the collards, see a companion planting layout for a raised bed.

How we chose

We worked from university and county extension pages that give collard timing, spacing or harvest guidance. We opened each page with curl on 2026-10-22 and read the text before using it. We left out retail listings and blogs, because they do not give the frost, spacing and harvest figures the post needs. A claim stays in the post only when the sentence that supports it appears on a page we opened, and each figure carries its source name.

The criteria were practical. A claim had to bear on growing collards into the fall: timing, hardiness, spacing and harvest. We did not include claims about fertilizer rates, soil chemistry, insects or plant diseases, because the post explains a fall planting rather than a treatment plan.

What we could not verify

Several things a fall collard grower needs are not in the pages we opened. None of them gives a first-frost date, and none gives a single sowing date that works for every region. The NC State collard page is dated 2001 in its own text, so its figures are older guidance and this post treats them that way. Where the sources disagree on the best season, the post reports both readings rather than choosing one.

What the sources do not say

We did not find a figure for how long collards keep producing after a hard freeze, so the post does not give one. We did not find a yield per row or per square foot for fall collards. We did not find a variety recommendation that the sources agree on, and this post does not name one. The Pamlico County page gives a fall window for its own area, not for every county, so the July 15 to September 15 window applies only where the source places it.

Frequently asked questions

When should collards be planted for a fall harvest?

Count back from your first fall frost using the variety’s days to maturity, following the University of Maryland method of adding 10 to 14 days. Alabama lists mid-August through mid-September as a planting window, and Pamlico County gives July 15 to September 15 for its area.

Can collards survive a frost?

Yes, according to the sources. The University of Maryland guide says collards are hardy enough to withstand heavy frosts in spring and fall. The NC State collard page says a mature plant will withstand frosts and light to medium freezes.

How far apart should fall collards be planted?

Illinois Extension says to thin the seedlings to 6 inches apart, let them grow until they begin to touch, and then harvest whole plants to leave 18 inches between plants. It also advises at least 3 feet between rows.

How can collards be harvested without losing the plant?

Pamlico County advises stripping mature leaves while leaving the growing terminal bud in place, since removing the bud drastically slows growth. Alabama says to remove only one-third of the bottom lower leaves at a time.

Will fall collards keep growing into winter?

The NC State handbook lists collards among cold-hardy crops that, planted in fall, may live through the winter or go dormant and flourish again in early spring. The handbook’s wording allows for both outcomes, so the post does not promise one.

Sources

• University of Maryland Extension, Growing Leafy Greens in a Home Garden, https://extension.umd.edu/resource/growing-leafy-greens-home-garden (opened 2026-10-22)
• Pamlico County Center, N.C. Cooperative Extension, Fall Collards: It’s Time to Plant, https://pamlico.ces.ncsu.edu/news/fall-collards-its-time-to-plant/ (opened 2026-10-22)
• University of Illinois Extension, Collard, https://extension.illinois.edu/gardening/collard (opened 2026-10-22)
• NC State Extension, Collard Greens, https://content.ces.ncsu.edu/collard-greens (opened 2026-10-22)
• Alabama Cooperative Extension System, Grow More Collard Greens, https://www.aces.edu/blog/topics/lawn-garden/grow-more-collard-greens/ (opened 2026-10-22)
• NC State Extension Gardener Handbook, Chapter 16: Vegetable Gardening, https://content.ces.ncsu.edu/extension-gardener-handbook/16-vegetable-gardening (opened 2026-10-22)