[hammers07]

i planted some red onions and some of the plants whilst appearing to be growing well have off white coloured seed sacks on top of the stems. I opened one and it wa full of what looked like seeds. Why would this happen ? Could it be that the onion sets i used (bought from garden centre) were old ? :?:

[DD.]

This is 'bolting'. Red onions are renowned for it. They are not seeds, but flower buds.

Have a butchers at this thread..

HERE

[hammers07]

thanks , if i remove the effected stems will the onions still grow ok

[DD.]

Not as such. You'll find there's a flower stem inside the bulb. This will rot quickly & affect the onion so it won't store. You can still use them, but use them soon after harvest.