Ask-a-Dave's-Gardener: Broccoli failing to bloom, 1 by boysenthumb

boysenthumb wrote:
Planted 12 broccoli plants and only 1 plant has bloomed. Each plant was transplanted into the area about 2+ feet apart. The plants have all grown to about 3\' high and were started with small amount of slow release fertilizer on south side of brick wall - daytime temps have mostly ranged in 50-60 degrees North Texas.

Expected all of the plants to bloom about the same time??
I will appreciate any information.
Thank you.