[AlaninCarlisle]

I've been growing my own for more years than I care to remember but a question arose in my mind today when I was planting some onion sets. Is there any correlation between the size of the sets and the size of the fully grown onion? Do big sets produce big onions? Has anyone ever run a trial?

[gavinjconway]

No difference in the size but bigger sets are said to bolt easier if conditions force them to bolt..

[bazh]

Gavins right IMO the only thing that'll affect the size of an onion is the spacing between sets when planting.