Fall Garden Planning for Zone 7a: What to Plant, When, and How to Start Now

Your summer garden is peaking. The tomatoes are setting fruit, the beans are heavy on the vine, and the peppers are finally turning color. It feels like the garden season is at its best.

But right now, in late June, is the exact moment when your fall garden decides whether it succeeds or fails.

Most gardeners wait until August to think about fall planting. By then, the heat is already oppressive, they have not figured out what beds will clear in time, and they end up with a half-planned garden that barely produces. That does not have to be you.

This article covers what to plant for a fall harvest in Zone 7a, when each crop needs to go in the ground, and what you can do right now in June to set up a garden that feeds you through November and possibly December.

The Fall Garden Timeline for Zone 7a

In Zone 7a, your average first fall frost is around November first. That gives you roughly 120 days of cool-season growing time if you count from early July. Most cool-season vegetables need between 45 and 75 days from seed to harvest. That means you have plenty of room, but the math is unforgiving. If a crop takes 60 days to mature, you need to plant it no later than mid-September. If you plant it in October, it will not be ready before frost.

The fall gardening calendar breaks into three clear windows.

June through mid-July: This is when you start slow maturing crops indoors or sow fast crops directly in the ground. These include broccoli, cauliflower, cabbage, and the longest varieties of carrots and beets.

Mid-July through August: This is the main planting window for most fall garden crops. Lettuce, spinach, peas, radishes, Swiss chard, kale, and quick-turning beets and carrots all go in during these months.

September: This is still productive, but it is the last chance for anything that takes more than 45 days. You can still plant fast radishes, arugula, and some leafy greens. After mid-September, you are mostly looking at overwintering garlic for next year.

Here is the timeline in practice:

• Mid-July: Sow broccoli, cauliflower, and cabbage starts (or seeds indoors). Plant fast carrots and beets.
• Early August: Sow lettuce, spinach, peas, radishes, and Swiss chard directly.
• Mid-August: Sow another round of lettuce, spinach, and radishes for later harvest.
• Late August: Sow arugula, turnips, and another carrot planting.
• September: Quick radishes, arugula, and baby leaf salads.
• Late September: Plant garlic cloves for next year's harvest.

Cool-Season Crops You Should Grow

Cool-season crops do not mind cold weather. They grow best when temperatures are between 50 and 75 degrees Fahrenheit. Most of them will tolerate light frost, and some actually taste sweeter after the first few frosts. That sugar concentration is the plant's natural antifreeze.

Broccoli

Broccoli is one of the most rewarding fall crops. Fall-grown broccoli produces tighter heads and milder flavor than spring broccoli, because the cooling weather slows maturation and concentrates the sugars.

Plant broccoli starts in mid-July for a fall harvest. You can start seeds indoors six weeks before transplanting, or buy small starts from a nursery. Space plants 18 to 24 inches apart in rows 24 to 30 inches apart. Broccoli needs rich, well-drained soil and consistent water. Side-dress with compost or a balanced fertilizer about three weeks after transplanting.

Harvest the main head when it is tight and dark green, before the florets start to loosen. Cut the stem about six to eight inches below the head. After the main head is harvested, the plant will often produce smaller side shoots for several weeks.

Cauliflower

Cauliflower is broccoli's more high-maintenance cousin. It needs consistent moisture, rich soil, and a lot of nitrogen. The tricky part is bleaching the head. As the cauliflower matures, the curd (the white part you eat) can turn purple or yellow if exposed to sun. You blanch it by bending the outer leaves over the head and tying them together, or by wrapping the head in newspaper or a leaf.

Start cauliflower in mid-July for fall harvest. Choose early varieties that mature in 50 to 65 days. Matador and Polar Star are reliable fall choices. Keep the soil consistently moist. Inconsistent watering leads to buttoning, where the plant forms tiny, undeveloped heads.

Cabbage

Cabbage is tough, stores well, and takes up very little space. A head that weighs three to five pounds feeds a family for days. Fall cabbage is especially good because the cooling weather produces denser heads and sweeter flavor.

Plant cabbage starts in mid to late July. Space plants 12 to 18 inches apart. Cabbage is a heavy feeder. Work plenty of compost into the bed before planting and side-dress once during the season. It also responds well to a light application of bone meal at transplant time, which supports head formation.

Harvest when heads feel firm and dense. Cut just below the lowest leaves. If you want to store cabbage longer, harvest before the first hard frost and store in a cool, humid place like a root cellar. Wrapped in plastic or placed in perforated bags in the refrigerator, cabbage keeps for one to three months.

Kale

Kale is one of the easiest fall crops. It is basically indestructible once established, tolerates heavy frost, and continues producing all winter in Zone 7a with a row cover or cold frame. It is also incredibly nutritious. One cup of raw kale has more vitamin C than an orange and more vitamin A than carrots.

Sow kale seeds directly in the ground in early August. Plant them about a quarter-inch deep and two inches apart, then thin to eight to twelve inches apart. Kale grows fast in cool weather and will be ready for baby leaf harvest in about four weeks. Full-size leaves take 55 to 70 days.

Harvest from the bottom up. Pick the older outer leaves first and leave the center growing. The plant will keep producing as long as you keep taking from it. A single kale plant can feed a family all winter if you use a row cover.

Swiss Chard

Swiss chard handles both summer heat and fall cold better than almost any other leafy crop. You can start it in spring, push it through summer with shade cloth, and keep harvesting it well into fall. It is arguably the most versatile leafy vegetable you can grow.

Sow chard seeds in early to mid-August. Plant them one-half inch deep and two inches apart, then thin to six to eight inches. The seeds are usually multi-embryonic, so you will need to thin aggressively. Each seed can produce two or three seedlings.

Harvest outer leaves as needed. Like kale, chard keeps producing from the center. It does not bolt the way lettuce does, which makes it a more reliable summer-to-fall transition crop.

Lettuce

Lettuce is the classic fall garden crop, and for good reason. It grows fast, takes up very little space, and tastes nothing like the sad supermarket heads. Fall-grown lettuce is sweeter and crisper than spring lettuce, because cool weather slows the plant down and concentrates flavor.

Sow lettuce seeds in early August. Plant them shallowly, about one-quarter inch deep, since lettuce seeds need light to germinate. Sow in short rows or a wide band so you can harvest baby leaves over several weeks. Use succession plantings every seven to ten days through September for continuous harvest.

Pick individual outer leaves or cut the whole head at the base. If you leave the root in the ground and water it well, many varieties will produce a second, smaller harvest. Butterhead and romaine types do this more reliably than loose-leaf varieties.

Spinach

Spinach is one of the earliest cool-season crops. It grows best in temperatures between 40 and 75 degrees and bolts as soon as the weather warms. This makes it perfect for a fall planting, because you get a full growth cycle in cool weather before any bolting risk.

Sow spinach seeds in early to mid-August. Plant them one-half inch deep and two inches apart, then thin to four inches. Spinach germinates faster in cool soil than in warm soil. If the soil is still hot from summer, soak seeds in water overnight before planting to speed up germination, or wait until late August when the soil has cooled.

Harvest outer leaves when they are three to four inches long. Spinach can be cut-and-come-again, producing multiple harvests from the same planting. After the first frost, cover with a row cover to keep it going through winter.

Radishes

Radishes are the fastest vegetable you can grow. Some varieties go from seed to harvest in 25 days. In a fall garden, this means you can plant a row in August and have dinner-ready radishes by early September.

Sow radishes every seven to ten days through September for continuous harvest. Plant them one-half inch deep and one inch apart. Do not skip thinning. Crowded radishes do not form proper bulbs. Pull the thinnings and eat them like baby turnips.

Red Earth, French Breakfast, and Cherry Belle are reliable choices for Zone 7a. For a bigger reward, try Daikon radish. Daikon is a winter radish that grows six to eight inches long and can be stored in the ground through winter under heavy mulch.

Carrots

You already know about carrots from the main vegetable series. For a fall harvest, plant carrots in mid-July through August. Fall carrots tend to be sweeter than spring carrots because cool weather converts starch to sugar.

Use medium-maturing varieties like Scarlet Nantes or Touchstone Supreme for a fall planting. They take 65 to 75 days, so plant them by mid-August for a late fall harvest. If you mulch heavily after the first frost, you can leave carrots in the ground and harvest through winter.

Beets

Beets are a fall garden workhorse. You eat the roots and the greens. They grow fast, store well, and are easy to prepare. The greens alone are worth the planting.

Sow beet seeds in mid-July through August. Plant them one inch deep and two inches apart. Remember that each beet seed is actually a cluster of seeds, so multiple seedlings will emerge from each planting point. Thin to three to four inches apart.

Harvest baby beets at any size. For full-size beets, wait 50 to 60 days and check the shoulder above the soil. If it is about one inch wide, it is ready. The greens are excellent cooked or sautéed and taste like a cross between spinach and chard.

Peas

Fall peas are underrated. They grow fast in cool weather and produce sweeter pods than spring peas, because the cooler temperatures slow maturation and build sugar. English peas, snow peas, and snap peas all work well.

Sow peas in early to mid-August. Plant seeds one inch deep and two inches apart on a trellis or in a wide band for baby leaf harvest. Peas need cool soil to germinate, so this timing is ideal. In Zone 7a, you can also sow peas in late September for a very early spring harvest.

What to Prep Right Now

Late June is not too early to plan. While the fall planting dates are weeks away, there is work you can do in the garden right now to make the fall transition smoother.

Identify the beds that will clear in August. Your summer crops are at peak production now. Estimate when tomatoes, peppers, beans, and summer squash will finish. A tomato plant that has stopped setting fruit can be pulled in August. That frees up a bed for fall planting. Plan your fall beds now while the summer crops are still producing so you are not scrambling in August.

Build or replenish soil. Cool-season crops need good soil, and the summer crops have likely drawn nutrients from the ground. Add two to three inches of compost to beds that will go fallow for fall planting. If you have cover crop seed, consider planting a short-term buckwheat cover in cleared beds. It grows fast, suppresses weeds, and can be terminated in six weeks.

Buy fall seeds now. Many fall garden seeds are not available at garden centers until late July. Local suppliers run out. Order broccoli, cabbage, cauliflower, kale, and spinach seeds online or at a garden center now, while the full selection is still available. If you wait until August, you might only find what is left over from the spring display.

Repair or install season extension gear. Row covers, cold frames, and hoop structures are the difference between a fall garden that dies at the first light frost and one that keeps producing through November. If you want to extend your season, build or repair your season extension equipment now, before the fall garden is ready to benefit from it.

Plan your garlic planting. Late September is when you plant garlic cloves for next year's harvest. Source your garlic now. Seed garlic is best planted in the fall. Grocery store garlic often does not produce well because it has been treated to prevent sprouting or adapted to a different climate. Look for local seed garlic growers, online seed garlic suppliers, or your own saved cloves from last year.

The Fall Garden Mindset

There is a different kind of satisfaction in a fall garden. You are harvesting vegetables that people buy at the store in September and thinking, I could grow this. You are picking kale after the first frost and tasting something sweet that survived cold weather. You are pulling carrots from the ground in November and realizing the garden did not end in October.

The fall garden does not require expensive equipment or advanced skills. It requires knowing what to plant, when to plant it, and being patient enough to let cool weather do its work. If you follow the timeline above and prep your beds in June, you will have a productive fall garden without rushing or stress.

Start with two or three crops you actually eat. Do not plant a fall garden just to have one. Grow what you will use, learn the timing, and expand each year. By your third fall garden, you will not remember how you used to buy spinach and kale in September.

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— C. Steward 🐐