Fall savoy cabbage |
Crops fall into 2 categories-cold season and warm season crops. Warm season crops are those that abhor frost or getting their feet chilly. Most of the warm season crops are killed by frost and won't grow unless the soil is nice and warm. Cold crops are those that prefer when temperatures are cool or downright cold.
A rule of thumb is that if you eat the tuber, leaf or flower, it is typically a cold season crop. If you eat the fruit or seed, it is a warm season crop.
For fall gardening, you actually start some varieties as early as July. Fall crops are the same type of veggies you planted for your spring garden. You may have to start some varieties indoors as some seeds will not germinate in the hot temps of summer. You can extend the fall harvest by covering your veggies with crop fabric when chilly temps arrive in late October so you can harvest all winter.
Don't worry if you are just getting started now; there are plenty of cool season crops you can start from seed in September and many transplants you can order on line, pick up at your local nursery or big box store if you are getting a late start or just want to grab plants and plant.
Choose the Right Varieties
In addition to choosing the right plants for cold-weather harvests, you can also increase fall harvests by planting specific varieties bred for colder climes. Look for varieties marketed as: fast-maturing; short and compact; textured (such as curly kale and Savoy spinach), winter-hardy, frost tolerant, overwintering, for every season, year-round, remarkably cold hardy, etc.
Because daylight hours are getting shorter in the fall, you will need to add about 2 weeks to the “Days to Harvest” your seed packet gives as the seed packet dates are based on spring planting. Plants grow slower in fall because the days are getting shorter instead of longer.
Most plants growth will come to a standstill when daylight hours drop below 10 and don’t restart again until they go past 10 hours, late November to late January for us.
Just like in spring, seeds have to be kept moist to sprout. You can also plant the seeds in peat pots, you can reuse the plastic annual trays you got in the spring or even use plastic salad containers to get your seedlings going. You can put the plastic trays in a water catch pan, find a shady spot convenient to watering, fill with seed starting mix, sow your seeds and keep moist. When the seedlings get their true leaves on them (second set), they are ready to transplant into the garden or a larger pot.
There are some veggies that the temps can be too high to germinate in our Zone 7, like lettuce. These you will have to start inside or on the cool side of the house in the shade or indoors if you're having a really hot September.
Good choices for fall planting:
Root crops-Beets, Burdock, Carrots, Celeriac, Garlic, Kohlrabi, Leeks, Onions, Parsnips. Radishes, Root Parsley, Rutabaga, Salsify, Scorzonera, Turnips
Greens-Arugula, Celery, Chard, Dandelion greens, Fennel, Lettuce, Mustard, Collards, Chicory, Kale, Sorrel, Spinach, Peas, Fava beans
Brassicas-Broccoli, Cabbage, Cauliflower, Chinese Cabbage
Herbs-Marjoram, Parsley, Savory, Thyme, Sage, Cilantro, Oregano
Below are some general sowing and planting times for cool season crops for our Zone 7 gardens:
July
Beets, carrots, Asian greens (pak choi, tat-soi), cilantro, collard greens, endive, escarole, frisee, fennel, kale, kohlrabi, leeks, mustard, onions, parsnips, scallions, and Swiss chard. Use transplants for broccoli, Brussel sprouts, cabbage, cauliflower, Chinese cabbage.
August
The rest of the greens (arugula, corn salad, lettuce, miner’s lettuce, spinach, mustard, endive), kohlrabi, onions, snap peas, scallions, cabbage plants, radishes, and turnips. Peas and Fava beans can be sown in August for spring harvests in Zone 6 or higher. Use transplants for broccoli, Brussel sprouts, cabbage, cauliflower, Chinese cabbage.
September
Sow more greens, carrots, and radishes. September is also a great month for starting perennial veggies, fruits, and herbs as well as flowers, trees and shrubs. Beginning of September for transplants for broccoli, Brussel sprouts, cabbage, cauliflower, Chinese cabbage.
October
The month to plant garlic for next year’s harvest and over-wintering onions. Order your favorites early as many sell out quick.
If you don’t want to start seeds, some big box stores and local nurseries have begun to have fall planting veggies. If none in your area do, there are many mail order seed companies that carry fall bedding plants. Late August, early September is the best time to get transplants into the garden for fall and winter harvests.
For more information on small space fall gardening:
Outdoor seed starting tips
Indoor seed starting tips
Ideal soil temperatures for seed starting
Growing fabulous lettuce and greens
Start a kitchen herb garden!
Midwest Perennial Vegetable Garden


