Why have my broccoli and Cauliflower failed to produce heads?
Posted by Suttons Staff on 26 July 2013 01:07 PM
The lack of heads on broccoli and cauliflower can be due to a pest or disease attacking the growing tip.  Other possible causes can include nutrient deficiency, water-logged or dry soils and low temperatures when the plants are very young. 

Nothing can be done to encourage the plants to form heads and the plants should be destroyed.
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