Growing Broccoli

Brassica sp. : Brassicaceae / the mustard or cabbage family

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

(Best months for growing Broccoli 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 7°C and 30°C. (Show °F/in)
  • Space plants: 35 - 50 cm 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

15 Feb 21, Wayne (Australia - temperate climate)
Can I plant broccoli in the same bed as tomatoes after I have removed the used tomato plants. Also my Broccoli grew big and leafy but the fruit itself bolted and flowered immediately???? They were very well watered and a mild summer here?
16 Feb 21, Anonymous (Australia - temperate climate)
You can grow anything after anything as long as you prepare the soil well for the next crop. People talk about crop rotation, it doesn't have to happen that way, It grew big and leafy because you over fertilised. It probably bolted and flowered because you were growing it into hotter weather. It says here you can plant Sept to Nov. Depending on you temperatures I wouldn't be planting that time of the year unless you have quite cool weather into Xmas. General rule you plant winter harvesting crops late summer early autumn and summer harvesting crops after the cool/cold winter.
05 Jan 21, Mark (USA - Zone 9b climate)
What is a good varietall of broccoli for zone 9b?
06 Jan 21, (USA - Zone 4b climate)
Go to a seed selling website and look at different broccoli. Most broccoli will grow in a variety of climates. Each climate will have a preferred planting time.
31 Aug 20, Jimmy (Australia - sub-tropical climate)
I had 5 purple broccoli plants planted in April from seedlings that have grown really well but have failed to develop any heads at all. What went wrong?
31 Aug 20, Anonymous (Australia - sub-tropical climate)
If really big leafy plants then your soil was too rich in Nitrogen.
17 Aug 20, ashley shepherd (New Zealand - temperate climate)
my seedlings keep getting ruined, they start to grow then fall over/out with no roots left. I dug around and looks like grass grubs in my beds how do I rid my garden bed of these?
20 Feb 21, Jay (New Zealand - cool/mountain climate)
Perhaps they are still too small - transplant shock ? try letting them grow larger maybe and soak the furrow first not the plant after till established.
19 Aug 20, Anonymous (New Zealand - temperate climate)
Ring an agricultural supply company and ask to talk to an agronomists. Would probably be some grub or worm in the soil. I have never had the problem in 40 years.
06 Aug 20, Anthony Ryan (Australia - temperate climate)
My broccoli plants have finished producing main flower heads some side shoots are still growing though. Once they finish producing flower buds do you pull out the plant or cut or trim it so it will regrow next winter. I have heard both broccoli and cauliflowers are biennial if so what should I do for my cauliflowers also. Any help would be greatly appreciated
Showing 11 - 20 of 306 comments

Perhaps they are still too small - transplant shock ? try letting them grow larger maybe and soak the furrow first not the plant after till established.

- Jay

Please provide your email address if you are hoping for a reply


All comments are reviewed before displaying on the site, so your posting will not appear immediately

Gardenate App

Put Gardenate in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join our 60,000+ gardeners who already use Gardenate and subscribe to the free Gardenate planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About Gardenate | Contact us | Privacy Policy

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.
We cannot help if you are overrun by giant slugs.