Over the last few years, I have grown onions from seed ( I have some in root trainers now) however, I did purchase 50 onion sets, my onions in the past have been a bit up and down. So any advice from the forum might help. In the past my onions have never really grown very big, I had some big show-winning ones in and some Bedfordshire champ, I harvested some near the end of the season, but I left a lot of them to grow on a little, they didn't! and so I need help, Question 1. watering and feeding? when and how often, feed which is best. Question 2. when to harvest? and Question 3. do you expose the upper part of the onion even in the bright sunshine. sorry about all the questions.