Broccoli grows relatively slowly in the cooler months and is usually ready for harvest in 16 – 20 weeks. Cut the large central head when the buds are well formed, but before the flowers start to open. Removing this central head will encourage smaller side shoots to form. They’ll be ready for a second picking in a few weeks time.
The interesting Chinese broccoli called ‘Kailaan’ forms a looser, lighter head that is usually harvested when a few of the flowers have opened.
A layer of mulch will retain moisture in the soil.