|Average Seed / oz||Seed / 100′ Row||Average Yield / 100′ Row||Days to Harvest|
|7500||3 gr||60 heads||76|
|Planting Season||Ideal Soil Temp||Sun||Frost Tolerance|
|Spring/Summer||50-85°F||Full Sun||Moderately Tolerant|
|Sowing Method||Seed Depth||Direct Seed Spacing||Seeds Per Packet|
|Transplant or Direct Seed||1/4-1/2″||4-6″||515|
|Mature Spacing||Days to Sprout||Production Cycle||Seed Viability|
Cabbage is a moderately frost tolerant biennial that prefers full sun, although it will tolerate light shade. Plant in fertile, well-drained soil that is high in organic matter. Do not plant cabbage in same area year after year to avoid soil-borne diseases.
Cabbage seed can be started indoors 4-6 weeks before the last frost in spring or in mid-late summer for a fall crop. Sow seeds ¼-1/2" deep and 4-6” apart. Seeds will sprout in 5-17 days. Thin seedlings so that mature plants are 18-24" apart. Transplant seedlings outdoors when plants have 3-4 true leaves. Seeds can also be direct seeded outdoors when temperatures are 45-80˚ F.
Cabbage is a heavy feeder that will benefit from a mid-season nitrogen application. Provide consistent soil moisture during development, but cut back on watering a few weeks before harvest.
Harvest cabbage when heads are firm. Depending on the variety, harvest will be around 70 days after planting. Use a sharp knife to remove heads. Leave plant in place for a potential second harvest of smaller heads.
Thoroughly dry cabbage heads before storing. Cabbage will keep for two weeks in the refrigerator and up to three months in a root cellar.
Avoid cross-pollination keep your cabbage plants intended for seed at least a ½ mile from all other Brassica oleracea that may be flowering at the same time. Mulch to help plants overwinter, or in colder zones, dig up the plants, roots and all, and keep them indoors in a cool, humid spot for replanting in spring. Encourage the flower stalks to bold by slashing an X in the top of each cabbage head. Flowers are perfect and most can't be hand-pollinated as the stigma becomes receptive before the flower opens, and pollen is shed hours after the flower opens. Collect seeds when the seed pods turn brown.