By mid-July, most vegetable gardens are coasting. The tomatoes are set, the zucchini is doing its zucchini thing, and it is tempting to call the season planned and done. That instinct costs you months of food. July and August are not the end of planting season; they are the start of the second one, and in most of the country the fall garden it produces will out-eat your spring garden per square foot. Cool nights sweeten everything, the worst insect pests are winding down, and crops hold in the ground for weeks instead of bolting in days.
There is one catch: the fall window is unforgiving. Miss a spring sowing by two weeks and you harvest two weeks later. Miss a fall sowing by two weeks and you may harvest nothing, because frost closes the door on the far end. So this guide is organized the way you actually work in July and August: what to direct sow right now, what to start as transplants right now, and what to hold until August. Every days-to-maturity figure below is for the specific varieties we grow and sell.
The One Date That Decides Everything
Every fall planting decision comes from your average first frost date. Find yours (your local extension office or NOAA station data will give it), then count backward: days to maturity from the seed packet, plus about 14 extra days. That two-week buffer is what University of Minnesota Extension calls planning for slower fall growth: days shorten and nights cool just as your plants are trying to size up, so everything matures later than the packet promises. Gardeners call it the fall factor.
A worked example: your first frost lands around October 15, and Buttercrunch lettuce needs about 60 days. Add 14 for the fall factor and you get 74 days, which puts your last safe sowing around August 2.
We built a full chart that does this math for zones 3 through 10 and fifteen crops in our fall garden planting calendar by zone. Bookmark it; the rest of this article tells you what to do with the dates. If this is your first cool-season garden, start with our beginner guide to starting a fall vegetable garden.
Direct Sow in July: The Long-Season Fall Crops
These crops need 60 to 85 days of runway, which makes July the last call in most zones. Sow them directly in the garden; all of them resent transplanting or simply do not need it.
Root Crops: Carrots and Beets
Fall is the season carrots were made for. Cold nights push the roots to store sugar, which is why a November carrot tastes like a different vegetable than a July one. Our Rainbow Carrot Seed Pack runs 65 to 80 days depending on the variety, so it needs to be in the ground by mid-to-late July in zones 5 and 6, and by mid-August in zones 7 and 8. If you want a single dependable orange workhorse instead, Tendersweet matures in about 70 days and holds in the ground under mulch well past frost.
Detroit Dark Red beets are faster, about 58 days to full roots, and you get two crops in one: the thinnings are beet greens for salads at three weeks. Sow them through late July in zone 5 and into mid-August in zone 7.
A Second Round of Beans and Peas
Most gardeners never plant a second bean crop, which is a shame because July-sown beans hit their stride in September when the spring planting is exhausted. Contender bush beans are our pick for fall: about 50 days to picking, stringless, and quick enough to finish before frost as far north as zone 4 if you sow in early July. One warning: beans are tender. The first real frost kills the plants outright, so give them the days-to-maturity math plus an extra two weeks of picking time.
Snap peas run the other direction; the plants take a light frost without damage, though open blossoms and young pods can be nipped. Cascadia snap peas need 60 to 70 days, and fall-grown pods are noticeably sweeter than the spring crop because they fill in cool weather. Sow late July in zone 5, early August in zone 6.
The Greens That Shrug Off Frost
Kale and collards are the backbone of a fall garden because frost is not the end of their season, it is the point of it. Both convert starches to sugars when temperatures drop, and both keep producing into the low 20s F. Our 4-variety kale pack gives baby leaves in about 30 days and full plants in 55 to 65; sown in late July in zone 5 or mid-August in zone 6, it will feed you from late September until a hard freeze. Vates collards need about 70 days to full size and are the most cold-tolerant green we carry; customers in zone 7 pick them through December.
Swiss chard slots in here too at about 55 days, tolerating light frosts down to the mid-20s.
Start Transplants in July: The Cabbage Family
Cabbage and broccoli need too much calendar to direct sow in most zones now, but July is exactly the right time to start them in cell trays for an August transplant. Seeds germinate fast in warm soil (this is one crop family that likes 75 to 85 F soil for sprouting), so you will have stocky transplants in four to five weeks.
The timing rule: get cabbage transplants in the ground 8 to 10 weeks before your first frost. They finish sizing up through the first light frosts without complaint, and like kale, the flavor improves for it. Our 7-variety heirloom cabbage pack mixes early types that head up in 60 to 70 days from transplant with storage types that want 90 or more, so start the pack now and transplant the early ones with confidence; in zones 7 and warmer the storage types will make it too.
Two practical notes from our own beds in southern Oregon. First, start the trays somewhere with afternoon shade; July sun cooks seedlings in black cell trays. Second, transplant on a cloudy evening and water hard for the first week. An August transplant loses more moisture than a May one, and the first seven days decide whether it stalls.
Direct Sow in August: The Fast Finishers
August is when the salad garden comes back. These crops are quick enough that you can wait out the worst heat and still harvest for months.
Lettuce, the Fall Insurance Crop
Fall lettuce is better lettuce. No bolting pressure, no bitterness, and heads that hold in the garden for weeks. Loose-leaf types give first cuttings in about 45 days, so an early-August sowing in zone 6 feeds you from mid-September, and succession sowings every 10 days keep it coming. Our 20-variety lettuce pack is built for exactly this: 21,600 seeds across romaines, butterheads, and loose-leaf types, which means you can sow a fresh row every week from August to September and let the varieties sort out which loves your fall best.
One thing lettuce will not forgive: hot soil. Lettuce seed goes dormant above about 80 F soil temperature, which is why August sowings fail for so many people. More on beating that below.
Spinach, Arugula, and the Mustards
Bloomsdale spinach is the classic fall-to-winter green: about 45 days to harvest, hardy into the teens, and in zones 6 and warmer a September sowing will overwinter under mulch and explode in early spring. Spinach germination falls apart above 75 F soil, so hold it for late August, or prime the seed by refrigerating it between damp paper towels for three to five days before sowing.
Arugula is the fastest green we sell: baby leaves in about three weeks, and fall-grown leaves are nutty instead of harsh. Mustard greens run about 45 days and take a light frost. Sow both in August anywhere, and into September in zones 7 plus.
Radishes and Turnips
Radishes are the last seed you sow and the first thing you eat. Cherry Belle is ready in 22 days, which means you can sow it in early September in zone 5 and still beat frost comfortably, and in warm zones you can keep sowing into November. Sow a short row every week; 800 seeds is a lot of weekly rows. Turnips need about 50 days and pull double duty, greens at a month and roots at two.
Cilantro Finally Behaves
If cilantro bolts to seed in two weeks every summer, plant it now instead. Sown in August, slow-bolt Santo cilantro gives cuttable leaves in about 50 days and then just keeps producing, because the cool, shortening days that end tomato season are the exact conditions cilantro wants. It takes a light frost without damage.
How to Get Seeds Up in Hot Soil
The hardest part of the fall garden is week one: you are asking cool-season seeds to germinate in the hottest soil of the year. Four fixes, in the order we reach for them:
- Sow slightly deeper than the packet says. A quarter inch deeper reaches cooler, moister soil.
- Water twice a day until emergence. Evaporative cooling drops the top inch of soil several degrees, and germinating seeds that dry out once are dead.
- Shade the seedbed. A length of 30 to 50 percent shade cloth, a board propped on bricks, or even a row of tomato foliage to the south. Remove it the day seedlings show.
- Check the numbers. Our seed germination temperature chart lists optimal soil temperatures for every crop here. Lettuce and spinach are the two that truly strike in heat; brassicas, beans, and radishes germinate happily at 80 F plus.
Keep Sowing Until Frost Closes the Door
A fall garden is not one planting; it is a rhythm. Radishes and lettuce go in every week to ten days, arugula and spinach every two weeks, right up to the dates on the zone chart. This is succession planting, and fall is its easiest season because nothing bolts and harvests stretch instead of stampeding. When a crop comes out, a new one goes in the same day.
Your July and August at a Glance
| Timing | Direct sow | Start as transplants |
|---|---|---|
| Early July | Carrots, beets, bush beans, chard, collards | Cabbage, broccoli (cell trays) |
| Late July | Carrots (zones 6+), beets, kale, snap peas, turnips | Cabbage for zones 7+ |
| Early August | Kale, chard, lettuce, arugula, mustard, cilantro | Transplant July-started cabbage family |
| Late August | Lettuce, spinach, arugula, radishes, turnips | Last cabbage transplants (zones 7+) |
Zone timing shifts everything above by two to six weeks; check the zone-by-zone chart before you sow. For a shorter list of the single best crops to start this month, we keep a quick guide to what you can plant in July.
Give the Second Season a Fair Start
One last thing before you sow: that bed just spent three months feeding a tomato. Rake out the debris, work in an inch of compost, and treat it like the new season it is; our guide to preparing garden soil covers the ten-minute version. If you would rather grab one box than build a list, our Fall Vegetable Seed Pack bundles 12 cool-weather varieties matched to this exact window.
And if you are reading this in September thinking you missed it: you have not. Plenty still goes in late, and our guide to what to plant in November picks up where this one ends.
Sources: University of Minnesota Extension, Planting Vegetables in Midsummer for Fall Harvest. Days to maturity are from our own variety trials and packet specifications for the varieties linked above.
