Growing Broccoli

Brassica sp. : 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 Broccoli in New Zealand - cool/mountain regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • 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

Your comments and tips

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30 Aug 09, Liz (New Zealand - temperate climate)
Iainie, you may be growing sprouting broccoli which will not produce a compact head but lots of loose ones. When the weather is hot and/or dry broccoli will flower quite quickly.
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01 Aug 09, ian todd (New Zealand - temperate climate)
What's the best way to trim sprouting broccoli to keep the plant producing please?
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26 May 09, James (New Zealand - temperate climate)
Trish, your broccoli plants need their leaves to grow good size heads. So keep trimming to a minimum. Certainly, you can eat the leaves but you might find them a bit tough.
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04 May 09, Dawn (New Zealand - temperate climate)
I was so excited to use the egg shells and get rid of the green catapillar. Now, welcome the grey aphid! After much research I have found that native Aust. ladybirds and lacewings do the trick. After even MORE research I've found where to buy them: (I cannot post a web link) bugs for bugs (dot com, dot au)
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27 Nov 08, Liz (New Zealand - temperate climate)
Peter, your broccoli seedlings should be fine. Broccoli usually do well when the plants produce plenty of leaf. They produce flower heads later in the growth cycle.
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23 Sep 08, Ben (New Zealand - temperate climate)
I am new to planting broccoli and have recently cut the main head off one of the broccoli plants. I have several side shoots off the same plant, do they get as big as the main head?. The reason i ask is i dont want to leave them too long and let them go to flower.
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16 Sep 08, Liz (New Zealand - temperate climate)
Jen, you will be able to collect seeds but if you have planted F1 hybrid seedlings they may not reproduce.
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16 Sep 08, Liz (New Zealand - temperate climate)
Alex, Cut it across the stem just above the first leaves. The plant will then send out side shoots.
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Best to wait until January/February if you can

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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. GardenGrow 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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