giant onions

[digger01]

i am interested in trying to grow a giant onion on my allotment,what sort of weights can i expect outside with a good variety,or should i use my greenhouse , i have not got a pollytunnel ,i have grown about 2 pound onions outside without doing anything special.they were from the variety kelsea.

[Tam]

I found this to be of interest :

Mammoth Onions - My Garden

[digger01]

thanks a great help,plenty of information.