Before planting cabbage, work in a 2-inch layer of rich compost or other organic matter, such as Miracle-Gro® Organic Choice® Garden Soil.
Start cabbage seeds indoors 5-7 weeks before the last frost, then set out the seedlings when they are 4-6 weeks old. Plant nursery-grown transplants 2 weeks before the average last frost date.
Once your seedlings are established, water with a soaker hose to avoid wetting the foliage. Keeping the soil moist will help keep your cabbage heads from cracking. Feed with a water-soluble plant food, such as Miracle-Gro® Water Soluble All Purpose Plant Food, twice a month until harvest. Weed carefully to avoid damaging the roots of your cabbage plants.
Cabbage is ready to harvest when the heads are tight, firm, and 4-10 inches in diameter. Cut the stem just below the head, using a sharp knife. Your cabbage will taste the best right after harvest, although you can store it for several months in cool, humid conditions.