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The best onions from seed.....
Verdun
Posts: 23,348
in Fruit & veg
Having tried various onions from seed I consider The Kelsae to be the best. Mild flavour, keeps well, can grow huge or small....according to spacing....and looks darn good in the veg plot especially at harvest time when ripening in the sun. 
agree or disagree?
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As someone who hasn't grown onions from seed before, but is debating doing so this year, I will bear your recommendation in mind and anyone else who replies on this post
I shall be doing it on Sunday, my propagator only arrived yesterday and I can't set it all up until Saturday (re-shuffling the GH and awaiting the construction of a bench for it to sit on), so fingers crossed Sunday will be when the ball gets rolling!
I do indeed, a little indulgent but we all deserve a treat
I'm like a kid at Christmas, impatient to have a play! lol
I planted around 30 onions in early December as well as sum elephant garlic and they are both doing brilliant.
I "@lso" have 12 Overwintering chilli plants sprouting all over the place inside the house, so I'm getting there.
I grew Kelsae the year I couldn't get mammoth. I didnt think that they kept well.
I prefer Robinsons mammoth and red mammoth, which I sowed today.
Bedfordshire champion produce small bulbs which keep well.
I wasn't keen on red baron, I grew last year because I couldn't get red mammoth.
I regularly grow several varieties of onion among which Bedfordshire Champion always produces large bulbs on my soil (slightly acid) which store well too. While it is true that onions need a long season let me relate what happened to me in 2013. I sowed my seed on Jan 15th in a heated propagator at 16c and they dutifully emerged by the end of the month. I pricked them out (one of my least favourite jobs!) by mid/late February and they grew on very well. By mid March we were experiencing above average temperatures and the soil had warmed (sandy) sufficiently to plant out; so far so good. Then BANG we had two successive hard frosts 10 days later and I lost the lot! I had the serious hump but resowed on April 3rd in trays, which germinated quickly and got transplanted on about 25th April. The end result of this saga was a crop every bit as good as normal but a month late. It is day length which governs bulb development and as long as the plant is established and has a good root system you should get a result of sorts.