• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Broccoli Fails to Form Flower Head

The secret to growing beautiful heads of great tasting broccoli starts with the weather. Cool weather, even a light frost at harvest time, results in a sweeter flavor.

But when young transplants are exposed to cold temperatures they often start forming heads prematurely. The small plants don’t have the reserves or leaves necessary to produce the energy to form a full head. 

I planted some transplants that had already formed small heads while still in their containers, next to those that had not. I removed the small heads, planted and waited to see what would happen.  They formed small flowering shoots instead of nice heads like the others.

Buttoning of broccoli can also occur when plants are exposed to drought or other stress that limits leaf growth and promotes premature flowering.

Avoid this problem in the future by protecting tender transplants from frost, then provide ample moisture, and proper fertilization.

A bit more information:  Cauliflower is also subject to buttoning when exposed to cold temperatures or other stresses when it’s a small transplant. The long days and hot temperatures of summer can cause cauliflower curds to turn reddish purple and the leaves will grow through the head.  When broccoli is exposed to these conditions it quickly forms flowers and seeds. This causes a bitter, less desirable flavor in both plants.

Related

Upcoming Webinars & Appearances


Feb. 4, 2023
WCBA's Home Building &
Remodeling EXPO

West Bend, WI
 

Feb. 10-12, 2023
PBS Wisconsin
Garden & Landscape EXPO

Madison, WI

June 3 – 11, 2023
“Castles & Gardens” Adventure in Ireland with Melinda Myers
Includes the Bloom Festival in Dublin!

CLICK HERE for more information on Melinda's 2022 Wisconsin State Fair presentations on
Affordable Food Gardening 

CLICK HERE for pollinator gardening webinars, videos & DIY projects

Watch Melinda's past webinars ON DEMAND

Learn More

Book an Appearance

Learn More

Enter to Win
a Corona Tools
Hori Hori Knife!

ENTER NOW