What to Plant in July and August for a Fall Harvest: Your Second Garden Season Starts Now

Most gardeners think planting season ends in June. It does not.

The best vegetable garden of the year actually starts in July, and it produces some of the sweetest, most reliable harvests you will ever pull from the ground. Fall vegetables grow more slowly than summer crops, which means they develop richer flavor. The cooler weather cuts down on the pests that chew through warm-season plants. And the shorter days, paired with more rainfall, mean less work keeping them alive.

The only reason people miss this window is that nobody tells them about it in June when the big-box stores are full of tomato starts and nobody is handing out free gardening tips.

This guide tells you exactly what to plant in July and what to plant in August for a fall harvest in Zone 7a, with specific timing, planting methods, and the unique challenges that come with sowing seeds into hot soil.

Why a Fall Garden Is Easier Than a Spring Garden

Spring gardening gets all the attention because everything looks new and exciting. But fall gardening is simpler in several ways that matter to a home gardener.

Pests are less persistent. Cabbage loopers, squash bugs, and hornworms decline as temperatures drop. You do not have to fight them the way you do in June.

Watering gets easier. Fall brings more consistent rainfall, and cooler temperatures mean the soil holds moisture longer. You still need to water, but not as urgently as in peak summer.

Flavor is better. Many of the best vegetables for eating actually improve after a light frost. Carrots, kale, turnips, and broccoli all develop more sugar when they sense cold weather coming. That is why a fall carrot tastes nothing like a spring carrot.

You can use space that summer crops have vacated. Tomato plants usually start declining by July. Bean plants slow down after peak production. Those beds are ready for something new.

And working in the garden is pleasant. July heat is exhausting. September cool is refreshing.

The Math Behind Fall Planting

Everything in fall gardening comes down to one calculation: your first frost date minus the number of days a crop needs to mature.

Your first expected frost in Louisville, Tennessee, is around November 1. That is the hard deadline. Anything that takes longer than that from seed to harvest will not make it. (You can extend the window by a few weeks with row covers or a cold frame, but that is covered in other articles.)

Here is the math in practice. Let us say you want to grow broccoli, which takes about seventy to eighty-five days from seed to harvest. Count back from November 1. Eighty-five days before November 1 is around August 9. That means you need to get broccoli seeds in the ground by mid-August at the latest.

But broccoli does not like hot soil for germination. If you sow seeds in August ground that is sitting at seventy-five degrees or more, they may struggle to sprout. The solution is indirect sowing: start the seeds in trays in a shaded, cooler spot, then transplant the seedlings into the garden when they have four or five true leaves.

Now let us look at radishes, which take twenty-five to thirty days. Count back from November 1. Twenty-five days before November 1 is around October 7. You can sow radishes in the ground in early August and they will be ready in September, well before the frost. You can sow a second batch in September and harvest them in October. And a third batch in early October for an October-to-November harvest. Radishes give you three separate harvests from a single summer planting.

Every vegetable has a days-to-maturity number on the seed packet. Write that number down. Subtract it from November 1. The result is your planting deadline for that crop.

Here is a quick reference for the most common fall vegetables in Zone 7a.

• Radishes: 25 to 30 days. Plant any time from July through October.
• Lettuce: 45 to 60 days. Plant July through September.
• Spinach: 40 to 50 days. Plant July through early September.
• Kale: 55 to 70 days. Plant mid-July through September.
• Swiss chard: 55 to 65 days. Plant July through August.
• Collards: 55 to 75 days. Plant mid-July through August.
• Mustard greens: 45 to 65 days. Plant July through September.
• Turnips: 40 to 60 days. Plant July through August.
• Beets: 50 to 65 days. Plant July through August.
• Carrots: 60 to 75 days. Plant July through August.
• Peas: 60 to 75 days. Plant August through September.
• Spinach: 40 to 50 days. Plant August through September.
• Broccoli: 70 to 85 days. Start seeds indoors mid-July, transplant mid-August.
• Cabbage: 70 to 100 days. Start seeds indoors late July, transplant late August.
• Cauliflower: 55 to 85 days. Start seeds indoors early August, transplant late August.
• Garlic: Not planted from seed in summer. Plant garlic cloves in October for a June harvest the following year.

This table assumes direct sowing unless otherwise noted. If you are starting seeds indoors, add two to three weeks to your timeline.

What to Plant in July

July is the month where fall gardening really begins. The weather is hot, but the window for slower-maturing crops is open.

Start Broccoli and Cauliflower Seeds Indoors

Broccoli and cauliflower are two of the most rewarding fall crops. They produce large heads that are far superior to anything you can buy in a grocery store. But they need about seventy to eighty-five days to mature, and they do not germinate well in hot soil.

Start them in seed trays in a shaded spot or indoors. Sow the seeds about half an inch deep in a light seed-starting mix. Keep the soil moist and cool. Germination usually takes five to ten days. Transplant the seedlings into the garden in mid-August, after the worst of the heat has passed.

Choose varieties suited to Zone 7a. For broccoli, "Green Goliath" and "De Cicco" (a loose-head variety that keeps producing side shoots) are reliable. For cauliflower, "Snowball" and "Amazing" are good choices. Avoid early varieties that mature in under fifty days; they are designed for cooler zones and will bolt in a Tennessee fall.

Start Cabbage Seeds Indoors

Cabbage works the same way as broccoli. Start seeds indoors in late July and transplant in late August. Green Globe, Golden Acre, and Red Express are solid choices for home gardens. Cabbage needs rich, consistent moisture and takes about seventy to one hundred days from seed to mature head, so timing matters.

Direct Sow Quick Crops

While you are starting those slow seeds indoors, put fast crops directly into the ground. Radishes, lettuce, and spinach can all be direct sown in July and will be harvestable before the weather turns.

Sow radishes every ten to fourteen days for a continuous supply. Use loose-leaf lettuce varieties like Oakleaf, Black Seeded Simpson, or Lollo Rosso instead of head lettuce, which can struggle in summer heat. Spinach does best with some shade in July; plant it where a taller summer crop is already providing partial shade, or use a shade cloth.

Sow Beans and Cucumbers for Fall Harvest

Bush beans and cucumbers can be planted in late July for a fall harvest. Choose shorter-maturing varieties. Bush beans like "Provider" and "Contender" are ready in forty-five to fifty-five days. Cucumbers like "Marketmore" and "Poinsett 76" mature in fifty to fifty-five days.

Plant them in a spot where the summer tomatoes or peppers are winding down. The soil will still be warm, which helps germination, and the cooler fall weather will slow down the pests that attack cucumbers and beans.

What to Plant in August

August is when the fall garden really takes shape. By early August, you are planting anything that can make it to harvest before the first frost. After mid-August, you are in quick-crop territory.

Direct Sow Root Vegetables

Carrots, beets, and turnips are among the best fall crops. They develop sweeter, more tender roots when they mature in cool weather. August is the last good window for most of them in Zone 7a.

Carrots take sixty to seventy-five days. Sow seeds directly in the garden in early to mid-August. Carrots need loose, stone-free soil and consistent moisture to germinate. Keep the seed zone moist until sprouts appear, which can take two to three weeks. Thin seedlings to two inches apart once they are established. For Zone 7a, "Nantes" and "Scarlet Nantes" are reliable varieties that grow straight and sweet.

Beets take fifty to sixty-five days. Sow seeds directly in the garden in mid-August. Beet seeds are actually clusters of multiple seeds, so you will need to thin them to three to four inches apart. "Detroit Dark Red" and "Cylindra" (a cylindrical variety that is easier to slice) are excellent choices. You can eat the greens as well as the roots; beet greens are similar to chard and cook the same way.

Turnips take forty to sixty days. Sow seeds in mid-August. "Turnip Top" is a dual-purpose variety; the roots are small but edible, and the greens are excellent. "Hakurei" (also called salad turnip) is tiny, sweet, and can be eaten raw. Turnips are one of the fastest fall crops. You can go from seed to harvest in less than two months.

Direct Sow Leafy Greens

Kale, collards, mustard greens, Swiss chard, and spinach are the backbone of the fall garden. They are hardy, productive, and delicious.

Kale takes fifty-five to seventy days. Sow seeds directly in mid-August. "Lacinato" (dinosaur kale) and "Winterbor" are cold-hardy varieties that handle Tennessee fall weather well. Kale gets sweeter after a light frost and can be harvested continuously through the winter in Zone 7a. Cut the outer leaves first and the plant keeps producing from the center.

Collards take fifty-five to seventy-five days. Sow seeds directly in mid-August. "Georgia Southern" and "Vates" are the two standard varieties for this region. Vates is more cold-tolerant and should be your choice if you want greens that last through December. Collards are one of the most reliable fall crops you can grow.

Mustard greens take forty-five to sixty-five days. Sow in mid-August for an early fall harvest, or in September for a late fall crop. "Texas Everbearing" and "Virginia Common" are good local choices. Mustard greens have a sharp, peppery flavor that mellows in cold weather. They grow fast and produce a lot.

Swiss chard takes fifty-five to sixty-five days. Sow in July through August. Chard does not bolt in the fall the way lettuce does, which makes it one of the most reliable leafy greens for this season. "Fordhook Giant" and "Bright Lights" (which has colorful stems) are reliable choices. Harvest outer leaves and the plant keeps growing.

Spinach takes forty to fifty days. Sow in August for a fall harvest. In Zone 7a, spinach can overwinter with protection. If you sow in early September, the plants may go semi-dormant through winter and resume growth the following spring. "Bloomsdale Long Standing" is a standard cold-hardy variety.

Direct Sow Peas

Peas are a cool-season crop that many gardeners in Zone 7a skip because they associate them with spring planting. But fall-planted peas are excellent. The cooler fall weather prevents them from bolting the way they do in spring heat.

Sow snap peas or snow peas in August through September. "Sugar Snap" and "Sugar Daddy" are good varieties. Peas take sixty to seventy-five days from seed to harvest. If you plant in mid-August, you will be harvesting in October, when the weather is perfect for them.

Summer Planting Challenges

Sowing seeds in July and August is not the same as sowing in spring. The soil is hot, the sun is intense, and moisture evaporates quickly. Here is how to handle those conditions.

Heat and germination. Many fall crops do not germinate well in soil above seventy-five degrees. If the ground is still hot in July, you have two options. Start seeds indoors in a cool, shaded spot and transplant later. Or sow seeds in the ground at night or early morning, cover the row with a shade cloth to keep the soil cool until germination, and remove the shade cloth once sprouts appear.

Watering new seedlings. This is the most important thing in a late summer garden. A seed that dries out after germination is dead. Check new plantings twice daily, morning and evening, during hot weather. Water gently so you do not wash the seeds away. Drip irrigation or a soaker hose set on a short cycle works better than overhead watering, which can scald young seedlings.

Pests are still active. In July and August, you will still deal with flea beetles on brassicas, aphids on beans and peas, and spider mites on cucumbers. Floating row covers are the single best defense. Place them over the seedlings as soon as they emerge and leave them on until the plants are established and the weather cools. Insecticidal soap and diatomaceous earth are useful secondary options.

Soil preparation. The beds you are planting into may have been producing summer crops for months. That soil is likely depleted. Before sowing your fall seeds, add two to three inches of fresh compost and work it into the top two inches of soil. A side dressing of balanced organic fertilizer at transplant time gives seedlings a quick start. Most fall crops do not need heavy feeding; they grow slower in fall and will burn if you over-fertilize.

A Simple Fall Garden Plan for Zone 7a

Here is a practical example of a small fall garden planted on a single forty-by-eight-foot raised bed. This is not meant to be a template you copy exactly. It is meant to show how the timing works in practice.

Mid-July. Start broccoli, cauliflower, and cabbage seeds indoors. Direct sow radishes, lettuce, and spinach in the garden.

Early August. Direct sow carrots, beets, turnips, and peas. Transplant brassica seedlings if the heat is breaking. Direct sow more radishes and lettuce for a later harvest.

Mid-August. Direct sow kale, collards, mustard greens, and Swiss chard. Transplant cauliflower seedlings. Start a second planting of radishes and lettuce.

Early September. Direct sow another round of spinach, radishes, and lettuce. These will produce in October. Plant garlic cloves if you want a spring harvest next year.

By following this schedule, you will have a steady stream of fresh vegetables from September through November, with some crops extending into December.

Getting Started Today

You do not need to plan the whole fall garden at once. Pick one or two crops and start with them. The simplest entry point is radishes and lettuce. Sow them in the ground this week. They will germinate in a few days, and you will be eating them in less than a month. That fast feedback loop is one of the reasons fall gardening is so rewarding for beginners.

Then move to the next crop. Then the next. By the time August arrives, you will have a full fall garden in progress, and you will have learned what works in your soil and your microclimate.

The most important thing is to start. The window is open right now. The soil is warm enough for germination. The sun is still strong enough to drive growth. And November frost is not going to hurry up and arrive.

You just need to put the seeds in the ground.

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— C. Steward 🍅