Hi folks, I've sown onion sets again this year but a lot of them are starting to shoot up and grow seed bulbs on top. From what I can remember, this leaves me with a very small onion which has a long shoot and a seed bulb on top. Is there any way this can be prevented so as to give a decent sized onion in the ground. I've heard that if you cut off the seed bulb that is beginning to grow, that the onion will grow better, but I'm not sure if that's the case. Can anyone confirm this, or provide me with an alternative method of halting the seed bulbs growing, so I can produce better sized onions?