Onion seed

I've decided to grow onions from seed instead of sets, when is the best time for sowing and is greenhouse sown any advantage over direct bed sowing? does the variety matter? Mine are Centurion. Veg aren't my strong(y) point.

 

Hiya Strongy
I always sowed mine early March(ish), in the greenhouse with a little heat at night (they don't like it too warm mind). I would definitely think that direct sowing would lead to a crop of smaller onions. As for variety, you pays your money...
TBH, I got on ok with all the varieties I tried

 

Just sown mine in the greenhouse, slightly earlier than I usually do.
I tend to use those divided trays, and sow a few seeds in each section.

I then plant out in early April weather permitting.

Red Baron and Kappa for me.

 

Thanks, I'll probably sown in between then perhaps mid Feb. I only intend growing about 40.

 

Keep us posted

 

I got a packet of Bedfordshire Champion at crook stage inside a polystyrene fish box with a twinwall lid in the greenhouse at the moment

Kelsaes have failed to launch as have the Dutch Blood Reds

 

I had the same problem back in 2013. I ended up making 3 sowings, although my second sowing surprised me by germinating after I thought all was lost with them.

 

would a propergator be too warm for onions ? or ami best to go for a window sill till it warms up a bit then go for green house

 

Warm to germinate, then cooler conditions with as much light as poss

Got my bedfordshire ones out of the propogator now, just in the unheated greenhouse.

 

It seems I'm a bit behind on the Onion seed sowing, can you really do it this early on just a windowsill?

 

You're only a bit late if you want whoppers. If you want 'regular' size, plenty of time yet