[paul sadler]

if any of would like large onion's this growing season then start your onion sets off in module's your tray's I find this way you can get the onion's off to a good start I alway's start mine off as soon as they come into the shop's I recommend either .sturon or centurion. these are excellent and store well over winter ,
hope this help's any newcomer's ( HAPPY GROWING).

[Veg Plot 1B]

Does this help with the flavour?

Reason I ask is onions I have been using lately are tasteless, although did have a couple of good ones from local produce store, no idea what make though.

[mumofstig]

I doubt it would make any difference to flavour, which depends on variety and soil.
John says

The strong flavour of onions is caused by the sulphur content. High potash levels reduce the sulphur uptake so if you use low potash fertilizer you will get smaller but tastier onions eventually. I generally prefer a good flavour to large size with onions.

How to Grow Onions from Sets - Allium Cepa

[LILLILEAF]

I grew sturon from sets and from seed,i had very good results from both,yes they store very well :)and both grew very well and very big.

[Veg Plot 1B]

Thank you mumofstig

[Mr Dog]

I doubt it would make any difference to flavour, which depends on variety and soil.
John says

The strong flavour of onions is caused by the sulphur content. High potash levels reduce the sulphur uptake so if you use low potash fertilizer you will get smaller but tastier onions eventually. I generally prefer a good flavour to large size with onions.

How to Grow Onions from Sets - Allium Cepa

I'd also add that potash can hinder other nutrient uptake too. Potassium is good for onions in that it can increase yield and help with storage life.