Growing Broccoli

Brassica sp. : Brassicaceae / the mustard or cabbage family

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

(Best months for growing Broccoli in South Africa - Summer rainfall 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 45°F and 86°F. (Show °C/cm)
  • Space plants: 14 - 20 inches apart
  • Harvest in 10-16 weeks. Cut flowerhead off with a knife..
  • Compatible with (can grow beside): Dwarf (bush) beans, beets, celery, cucumber, onions, marigold, nasturtium, rhubarb, aromatic herbs (sage, dill, chamomile, oregano)
  • Avoid growing close to: Climbing (pole) beans, tomato, peppers (chilli, capsicum), eggplant (aubergine), strawberry, mustard
  • Nearly ready for harvest
  • Early stage
  • Side shoot regrowth after main head cut

Keep well-watered as seedlings. If left without water they will bolt to seed and be inedible. The plants should grow to develop plenty of large healthy leaves, then the green flowerheads follow, which are cut for eating. Leave the plant growing after cutting the main flowerhead, and get additional crops from the sideshoots which will develop.

Watch for cabbage white butterflies and remove the eggs and caterpillars as soon as possible.

There are two main types of broccoli. The purple sprouting is hardier. The heading varieties cope well with warmer weather.

Once a plant opens its yellow flowers then it is generally past eating as the flavour gets a bit overpowering and the plant gets very woody. Harvest them sooner rather than later.

'Broccolini' is a variety grown for the edible stalks. Grow fast with plenty of water and food, and pick as soon as possible.

Culinary hints - cooking and eating Broccoli

The stem (peeled), leaves, and flowerhead are all edible.

Steam for best flavour. Peel large stalks, slice and steam.
Goes well with blue cheese sauce.

Your comments and tips

15 May 12, mamorena serothoane (South Africa - Humid sub-tropical climate)
i am in bronkhorstspruit, need to plant broccoli for the first time, i don't have any experience on it, could you please help with the following questions, when is the right time to plant broccoli, which cultivar could be good for my area and lastly what are production programs to follow e.g fertilization, pest control etc.
28 May 12, Keith (South Africa - Summer rainfall climate)
I live in Centurion, not far from Bronkhorstspruit and I use the Summer Rainfall area as my guideline. We did use the subtropical guidelines when we lived near Durban. Broccoli is perhaps the easiest of the Brassicas to grow, but you should start your crop as seedlings in August/ September and transplant each seedling into a 2-3 litre pot of compost in about August. Transplant to your garden - use about a half-square metre per plant, in late September. We still have broccoli heads in late May here now, but we are blessed with warm weather. Frost may strike any day...
16 Aug 13, Adri (South Africa - Humid sub-tropical climate)
I have a problem after harvesting, sometimes everything is fine, broccoli lasts in the fridge for a week or two. Other times they turn yellow overnight, and also there is a problem with smell. When they smell it is so bad you cant have it in the house you have to bury perfectly fresh green broccoli heads... there doesn't seem to be a pattern, how do I harvest my beautiful broccoli to always have a good result?
16 Oct 13, Trudi (South Africa - Humid sub-tropical climate)
"If left without water they will bolt to seed and be inedible" - I refer your comment above - I think this is what happened to my broccoli - no heads but long sprouts - I presume that is what you refer to as "bolt to seed". I water my veggies every morning, are there any other factors that may cause this ? I presume I can't eat the long sprouts - do I cut it out and wait for the additional crops ?
19 Oct 13, (Australia - arid climate)
Those long sprouts are delicious You may even have planted out a brocolini
04 Mar 14, bux coetzee (South Africa - Humid sub-tropical climate)
Need to plant in tunnels to provide broccoli in winter /what watering system best/ soil preparation particular requirements/ temp to maintain ? combine with other ie greenpeppers BUX
09 Jun 14, Mothati Bagwasi Gabasiane (South Africa - Humid sub-tropical climate)
Can you add fertiliser as additional nutrition to manure? If so which is best?
23 Jun 14, Lynne Smith (South Africa - Humid sub-tropical climate)
When and how to plant Broccoli in Durban...Thank you.
18 Jan 15, jefrey phili (South Africa - Dry summer sub-tropical climate)
When to plant broccoli and how to control pest in broccoli? (For planting check under 'Broccoli' in the calendar. Liz)
25 May 16, Karan Rai (South Africa - Summer rainfall climate)
Greetings , I want to plant broccoli,being a novice , i need some help on how to grow them we are approaching winter ,we will have tempreture ,20/25 deg not very cold and no snow. Can you advise please Regards Karan rai
Showing 1 - 10 of 14 comments

Patricia, I experienced the same last year in zone 9b. Not a single head or side shoots. After six months I pulled the plants and put them in the compost. Nothing goes to waste in my garden.

- Roland

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