Calabrese not ready in over 1 year!

I'm growing some calabrese. It should have cropped towards the end of last summer. The plants where only perhaps 30cm high then and it didn't produce any brocolli last year. A grew them from seed, probably sown about May last year.

So, I thought. I'd leave them in for winter and see if I got some this year. I've now got 2 very large healthy looking plants (about 1m high) but no sign of brocolli. Since its the end of season its probably too late this year and I'll pull them out. But I can't bear to have wasted all that ground for over 1 year and seen no crop. Shall I keep waiting or give it up as a bad job? (due to the natural variability in Brassicas perhaps?)

I must admit I've never had much luck with Calabrese and do better with Purple sprouting.

My first thoughts are the seed peeps have given you some dodgy seed, perhaps the machine put cabbage instead of calabrese, my calabrese (iron man) only grow to a height of about 12-18 inches high before sprouting.
How did you prepare the ground? Did you feed?
Def give these up, cant see them doing owt now and perhaps buy another packet of seed from a different company and try again.
My prep is as follows..
Dig ground over Nov, let it lie and Feb chuck cack on, leave a week or so then dig in, sow seeds and when ready to transplant dig a big hole, lime the inside and fill with rotted compost, transplant, firm in and water well and wait.

I would also suggest eating the leaves. I have done so in the past and they were good to eat. Any greens are good for you so I would suggest that you do that and start again with fresh seed.

Sounds most odd to me 

Do you have a picture of the ?calabrese? to show us ?