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As long as you wait until mid-summer, you can sow anytime until late summer or even early fall in mild climates. Seeds will germinate in temperatures as low as 40 degrees Fahrenheit.
Your cabbages should be ready to harvest after around 20 weeks. More on growing cabbages: Cabbage white caterpillars. Grow your own Christmas dinner.
Like all brassicas, cabbages demand a rich, well-drained soil. Dig in plenty of compost and well-rotted manure before planting and incorporate it to a spade’s depth. These are heavy feeders so incorporate some fertilisers too – a good handful of blood and bone and a tight fistful of sulphate of potash per square metre.
CABBAGE. Growing tips: Cabbage can be grown all year round, but make sure it doesn’t mature in midsummer and don’t sow seeds in midwinter. Sow seeds in trays and transplant when they have about six true leaves. Cabbage likes full sun.
In cool-summer regions, plant cabbage in late spring for a fall harvest. In mild-winter regions, start seed in late summer—about 6 to 8 weeks before the first frost–for a winter or spring harvest. Cabbage comes to harvest in 80 to 180 days from seed and in 60 to 105 days from transplants depending upon the variety.
You can expect to see heads in approximately 71 days with green cabbage. Red cabbage takes slightly longer and Nappa cabbage will form small heads in only 57 days. Cabbage head formation sometimes occurs better in the moist, gently warming conditions of spring than in the cooling days of fall.
Fertilize 2 weeks after transplanting with a balanced (10-10-10) fertilizer. Three weeks later, add a nitrogen -rich fertilizer; cabbage needs nitrogen in the early stages. Practice crop rotation with cabbages to avoid a buildup of soil-borne diseases.
When placing cabbage plants in your garden, be sure to space seedlings 12 to 24 inches (31-60 cm.) apart to give them plenty of room for growing large heads. Early varieties of cabbage can be planted 12 inches (30 cm.) apart and will grow anywhere from 1- to 3-pound heads (454 gr.
There will not be just one new head, but several, usually three or four, but sometimes as many as six smaller heads will grow up around the rim of the original plant’s stub. In total, the new sub-heads will provide as much food as the original cabbage head, but with a delicious difference.
Cabbages need a sunny site and firm soil. Wherever possible, prepare the soil in autumn by adding well-rotted manure or garden compost and then leave it over winter to consolidate. Cabbages are best suited for growing in the open ground, but you could grow one or two in large, deep containers.
Cabbage requires a consistently moist soil. While it won’t tolerate sitting in wet, soggy soil, it needs regular watering to produce its leafy heads. Water your cabbage once a week, applying 1 1/2 inches of water to the soil. If the soil is dry to a depth of 3 inches, water more frequently.
Space your cabbage according to the guidelines on the plant tag, in an area that gets 6 or more hours of sun. Plant 1 to 2 inches deep in well-drained, fertile soil with a pH of 6.5 to 6.8. Improve native soil conditions by mixing in several inches of compost or other rich organic matter.
Cabbage can withstand frost down to 20 degrees or even 15 degrees F.
Cabbage. Cabbage likes cool temperatures as low as 26 degrees depending on the variety. In fact, you will find they do best in cool fall weather and are rather disappointing in a summer garden. However, if you start them early enough, you can still get a crop before the weather gets too hot.
Let the sunshine in: Cabbages need full sun – at least six to eight hours of direct sunlight per day. Water wisely: It’s best to water in the morning and at the base of the plant (soil level) keeping the foliage dry. Plants should be watered when the top 2 inches of the soil becomes dry to the touch.