Growing Cauliflower

brassica oleracea var. botrytus botrytus : Brassicaceae / the mustard or cabbage family

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

(Best months for growing Cauliflower in Australia - sub-tropical regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • 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 10°C and 30°C. (Show °F/in)
  • Space plants: 60 - 100 cm apart
  • Harvest in 15-22 weeks.
  • Compatible with (can grow beside): Dwarf (bush) beans, beets, celery, cucumber, onions, marigold, nasturtium, rhubarb, aromatic herbs (sage, dill, chamomile)
  • Avoid growing close to: Climbing (pole) beans, tomato, peppers (chili, capsicum), eggplant (aubergine), strawberry, mustard

Your comments and tips

27 Feb 17, robert (Australia - tropical climate)
Can I grow brocoli/cauliflower/rhubarb in Townsville and if so what time of year is best. Do they go into direct sunlight or shady area. Just moved to here and I want to establish my own garden for my needs.
28 Feb 17, John (Australia - temperate climate)
You can grow broccoli and cauliflower. There is a local group called - Permaculture Townsville and their website is: permaculturetownsville.org. Have a look at their site and maybe contact them for local advice. Rhubarb would be a real challenge as it likes cooler winters. Peter Cundall of various gardening publications suggests freezing the root, wrapped in plastic for a month during what we would call winter. I have not tried it but he has had many years of eperience and says it works. Trust this helps.
13 Feb 17, Trevor (Australia - temperate climate)
I have just started cauliflower inside. The seedlings have popped up and I have the seedlings next to a bright window. They look like they are stretching/elongated but afraid to put them outside as it is too hot. Will they be ok until I put them out in 4 - 6 weeks? Or maybe find a shady spot outside? I have them growing in toilet rolls. Thanks
14 Feb 17, John (Australia - temperate climate)
The legginess and leaning towards the light is a common feature of indoor grown seedlings. If you could find a light,airy spot outside that would be better. If you only have open places make a frame over them with some leafy branches or timber and an old net curtain. Keep the water up to them and they will 'harden off' as they grow. If they are still leggy when you are ready to plant them just plant them a bit deeper. Trust this helps.
27 Jun 17, Mike (Australia - temperate climate)
I had this problem early this year. I replanted the seedlings so that they weren't so long out of the soil. Then I put my seedlings out in the open late arvo and brought them back in 8-9 am. A bit of work doing this and if you forget they could dried out with the midday sun. Or as suggested make a frame up and put some shade cloth over them. Some places have 50 -- 70 -- 90% shade cloth - put it over the top. A bit of time, effort and a few $$ will make it easier in the future. Or some people grow the plants indoors and use a light bulb over the top of them at night. Just a few inches above the seedlings.
12 Feb 17, Des (Australia - temperate climate)
G'day Mark, you could try a two metre fence, horses love green veg. For "Caterpillars", use Yates Nature's Way. It is organic and it stops the larvae eating. It takes longer to work but you will find almost instant results. Being organic there is no harm in using it almost up to harvest.
23 Jan 17, (Australia - temperate climate)
I plant all caterpillar eating veggies ie kale, broccoli, cauliflower and cabbage, in the one large bed and net it while they are still seedlings. No white butterflies can get to them.
20 Mar 17, Mike (Australia - temperate climate)
Over the last few years I have the problem of sparrows eating off all my new seedlings planted out in early Autumn. Planted out Honi Tsai Tai, rocket, snow peas, lettuce, beetroot, green and red cabbage the other week. I have a shade cloth over to reduce the heat this time of the year but it couldn't cover all the plants. The birds went to town eating them. I went on the internet and found anti bird netting. 10x 5m $25. about 15mm mesh. This will not only keep the birds out but also cabbage moths etc. Maybe even bean fly (might double the mesh over. I also found Chinese Hong Kong people who sell it very cheap 3x 6 or 10m for less than $3. 2-3 weeks postage. I will be able to grow broccoli again now and also start earlier and finish later with my veggie growing. All you need is some PVC pipe, some pieces of wood / metal pipe about 20" long, the netting and some stakes or something to lay on the netting on the ground to stop birds etc getting in.
27 Jun 17, Mike (Australia - temperate climate)
Further to my comments above. The cheap Chinese netting was useless. The $25 (10m x 5m) netting not the best either. I have found this on the internet - 10m x 6.5m White Cross Weave Hail Net / Bird Netting $80. It is rows of knitted cotton with a V shape running between the rows. Expensive but it will keep just about everything out. Birds, moths and probably flies and bees. The framework for the netting above was a lot of work to move to do any work in the garden. I have constructed 2 frames with 20mm conduit pipe - 2m x 2m x1m high. Had to buy the 3 way elbows on the internet to join it all together. A place that sells hot house/shade house stuff. They are a little flimsy but with two people are very easy to move around. I intend to also put some 50% shade cloth over them early and late in the year to extend my growing seasons. Hope this helps other people considering this.
17 Dec 16, Agnes Lynn (Australia - temperate climate)
OOPs. i bought the seedlings from Masters and planted them. I dont think i will get any but i will keep watering.
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