I decided to try one of my granex sweet onions today. Almost as soon as I picked it I realised I should have waited longer. It's about the size of a garlic head and once I peeled off the outer layer there wasn't much left. And it was really mild - not oniony, but also not sweet. Hopefully it's because I picked it early. I'll give the rest until the end of the month before I have to take them out to make way for the melons and pumpkin.