bolting cauliflower and broccoli

Asked July 25, 2016, 1:58 PM EDT

hello and thank you for your time! my cauliflower and broccoli is bolting - some are are some are not should i just pull the ones that are? how do i prevent the other from not bolting? thanks!

Hennepin County Minnesota

1 Response

Thank you for the question. Long days and hot weather in the summer can cause broccoli and cauliflower to bolt and go to seed. This is precisely the weather we've had. There isn't much you can do now except to remove the plants that are bolting. You really can't prevent it from happening if its going to in your other plants but you can wait and see. Next year, you could try planting these vegetables a bit earlier to try and get a harvest before the truly hot weather sets in. You could then plant a fall harvest crop in early July.
Other tips to prevent bolting from Clemson University:

  • Maintaining a steady, moderate rate of growth.
  • Setting out young, healthy transplants that have not been stressed.
  • Watering well when transplanting to start root growth and remove air pockets from the soil.
  • Planting at the correct time for your area.
  • Growing slow-bolting varieties.


Thank you for contacting Extension.