These come under various other names but Google Images provides a good selection of views of these little gems. Our plantings have been sourced from different suppliers and vary in colour from Red to Gold and Brown. They all have one thing in common. They keep incredibly well. We were harvesting last years crop while still eating the previous year's harvest. And they are very strong flavoured.
The Garden diary tells us to plant these in July which we do religiously and have almighty success. Like all Onions they need lots of compost and lots of water otherwise the risk is a bunch of midgets.
Three months ago a patch was set aside for these and planted with Oats as a green manure crop. Today this was chopped and forked in well with a little Blood and Bone and a good few handfuls of Dolomite.
The rest was easy. Stick them in the ground, water and weed.