Growing Kale, also Borecole

Brassica oleracea sp. : Brassicaceae / the mustard or cabbage family

Jan F M A M J J A S O N Dec
  S                    
    T T T              
    P P P              

(Best months for growing Kale in USA - Zone 5a regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • P = Sow seed
  • Easy to grow. Grow in seed trays, and plant out in 4-6 weeks. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 46°F and 86°F. (Show °C/cm)
  • Space plants: 20 - 39 inches apart
  • Harvest in 7-10 weeks.
  • Compatible with (can grow beside): Dwarf (bush) beans, beets, celery, cucumber, onions, marigold, nasturtium, rhubarb, aromatic herbs (sage, dill, camomile)
  • Avoid growing close to: Climbing (pole) beans, tomato, peppers (chilli, capsicum), eggplant (aubergine), strawberry, mustard
  • Cavolo Nero kale (CC BY 2.0 licenced Dwight Sipler (flickr))
  • A seedling Cavalo Nero
  • Scotch kale

Green leafy plant. Kale is a good addition or substitute for cabbage varieties. Cavalo Nero can be grown in slightly smaller spacing.

Very winter hardy. Flavour is improved by frost. Ornamental varieties are colourful, and edible. Rotate with other crops to avoid clubroot infection.

Culinary hints - cooking and eating Kale

Strong flavoured and nutritious vegetable.
Wash well and chop finely then steam.
A tomato or cheese sauce will mask the flavour if too strong.

Your comments and tips

11 Feb 26, Akhi (Australia - temperate climate)
Is the harvest date from the date of transplant or from sowing date?
14 Feb 26, Faith Celeste Archer (Canada - Zone 7b Mild Temperate climate)
Harvest date is the time from seedling (from the time 2 leaves appear like Mickey mouse ears - or a blade of grass for Monocotyledons) to harvest. The reason it is not from sowing is the seed company has no idea when your seed will germinate from the time you planted it. That is to say, a seed can sit in the soil, waiting for its germination conditions to be met (temperature, light,water etc). Once the conditions are met, it germinates, and the growing conditions tend to be correct... so your seed/plant will grow as it's parent plant did. Example, I can sow seeds in fall, for spring growth. It should be noted that days to harvest is under ideal conditions...so let's say the temps fall below the growing temp range for that plant....the plant goes dormant, and starts growing again once temps are in the growing range. A drop in temps for 5 days will push your days to harvest out by 5 days (maybe more...because the plant may not kick into growing action right away - I am assuming the temp has not fallen so low it kills the plant). We had a forest fire nearby, and there were months of hazy days...clearly the plants could not grow...and this pushed the days to harvest out. I have read some agricultural papers, and rather than days to harvest they provide the number of hours of sunlight to harvest, they also define what intensity of sunlight is required to be counted as an hour of growing light. These numbers are converted to days (based on average hours of daylight etc.) In hopes of making things easier for the average gardener. Hope this info helps.
23 Oct 25, Kirk (USA - Zone 10a climate)
I want to enrich my sandy soil. What are the best components for this?
17 Apr 25, Maria Villa (Canada - Zone 3b Temperate Warm Summer climate)
Hello, can you say if Kale requires a lot of sun to grow or can it grow in shady areas of the garden? Thank you, MarĂ­a
17 Oct 24, Meg : Wimmera Victoria. (Australia - temperate climate)
In the last 6 months my Kale in particular, but all my brassicas to some degree have been inundated with Cabbage Aphids. Has anyone else had this problem and what can I do to get rid of it? Help please.
12 Nov 22, Caleb (USA - Zone 7b climate)
When do you harvest kale?
18 Nov 22, Ruth A Hersh (USA - Zone 9a climate)
Anytime it looks good to you, start harvesting the outer leaves, they will keep growing more from the inside. I over harvest mine sometimes, just leaving a few baby leaves coming out of the top, & they still keep coming,
15 Nov 22, Anonymous (USA - Zone 4a climate)
Read the notes here about when to harvest.
15 Sep 22, (Australia - temperate climate)
Does it need half sun Full sun or complete shade
21 Sep 22, Bee-Pie (South Africa - Humid sub-tropical climate)
Full sun
Showing 1 - 10 of 179 comments

I want to enrich my sandy soil. What are the best components for this?

- Kirk

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This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. Gardenate is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
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