By August most gardens are coasting. The tomatoes are in, the zucchini won't stop, and it feels like the season's work is done. It isn't. Late summer is the second planting season, and it is the one that fills the pantry.
Why plant in August?
Cooler days are coming
Seeds germinate in the August warmth, then the plants mature in mild fall weather, which is exactly what cool-season crops want.
Strong plants before frost
A seedling with six weeks of growth behind it shrugs off the first frost. One planted in late September doesn't.
Frost makes them better
Kale, cabbage, Brussels sprouts, and leeks get sweeter after a frost, and they store well for winter meals.
The pantry starts in the soil
Storage crops planted now are the jars, the root cellar, and the freezer in January.
What to plant now
Days to maturity are typical seed-packet numbers. Add about two weeks in fall because the days are getting shorter and growth slows.
| Crop | Days to maturity | Notes |
|---|---|---|
| Cabbage (green and red) | 70 to 90 | Start in trays, transplant at 3 to 4 weeks. Stores for months. |
| Cauliflower | 55 to 80 | Needs even moisture; shade cloth while it's hot. |
| Kale (Red Russian and others) | 55 to 65 | Sweeter after frost. Harvest outer leaves all winter in mild climates. |
| Brussels sprouts | 90 to 110 | Long season. Plant early in the month or use transplants. |
| Leeks | 100+ | Transplants now for a late-fall and winter harvest. |
| Bunching onions | 60 | Fast, forgiving, and can be succession-sown. |
| Golden beets | 55 to 65 | Roots and greens. Thin and eat the thinnings. |
| Celery | Transplants | Slow from seed; buy starts or start indoors. |
| Curly parsley, cilantro | 50 to 70 | Cilantro loves cool weather and bolts in heat. |
| Basil | 60 | One last round before frost; freeze or dry the surplus. |
Plus zinnias and snapdragons. Flowers in the fall garden keep pollinators and beneficial insects around for the whole season, and they look good doing it.
Count back from your first frost
Look up your average first frost date. For each crop, take days to maturity, add 14 days for slowing fall growth, and count backwards from the frost date. That is your last sowing date. For anything over 80 days, start seeds in trays now rather than waiting.
Set the garden up for success
- Start seeds in trays. Use a shallow tray with good soil and water from the bottom. Transplants are easier to protect than direct-sown seed in August heat.
- Protect tender seedlings. Shade cloth or insect netting shields new plants from harsh sun, cabbage moths, and hungry critters until they toughen up.
- Keep the soil evenly moist. Water early in the day and mulch to hold it. August seedlings that dry out once rarely recover.
- Enrich the soil. Summer crops took a lot out of the bed. Top-dress with finished compost before you replant.
- Know your first frost date. Plant so crops mature before hard freezes arrive.
This is the moment the coop pays off. The compost that started as deep litter in spring is finished by August, and the beds you are clearing for fall are where it goes. Pull the spent summer plants, toss the bug-eaten and bolted greens to the flock, cut the rest at the soil line, and spread an inch or two of compost before the new seedlings go in.
Extra tips
- Succession plant. Sow bunching onions, beets, and cilantro every two to three weeks for a steady supply instead of one glut.
- Choose cold-hardy varieties. Look for "overwintering" or "winter" in the name for kale, cabbage, and lettuce.
- Harvest often. Regular picking keeps plants productive longer.
- Use the greenhouse or cold frame. Salad greens, spinach, and herbs sown in August under cover keep producing well past the first frost.
- Preserve the bounty. Can, ferment, dry, and store so nothing planted now goes to waste in November.
From garden to pantry
Plant now → grow strong → harvest deep → store well. Cabbage and beets keep for months in a cool, dark place. Kale and leeks stand in the garden through frost. Leftover herbs dry or freeze in oil. Sauerkraut and pickles take the surplus and make it last until spring.
- Check the soil and add compost
- Plant fall crops
- Water and mulch
- Protect seedlings
- Plan for harvest and storage
August work today, abundance tomorrow. The heat is temporary. The food you grow now lasts all winter.