Heat treated Onion Sets

vegmandan · « **on:** April 01, 2008, 23:29 »

Does anyone else only use heat treated onion sets like me ?

I've never had a single "bolter" since changing to them.

They seem to be especially beneficial when growing Red onions as these are notorious for growing brilliantly and then sending up a bl##dy great flower spike after a prolonged hot dry spell.

I think it's worth the extra bit of money to guard against the good old "bolter".

love-my-plot · « **Reply #1 on:** April 01, 2008, 23:31 »

The red barons I ordered are heat treated but haven't arrived yet, so dunno what they're like yet.

John · « **Reply #2 on:** April 02, 2008, 00:02 »

I tend to prefer seed to set but heat treated are far better for not bolting.

SpudtheBinx · « **Reply #3 on:** April 02, 2008, 10:31 »

How do they heat treat them?

vegmandan · « **Reply #4 on:** April 02, 2008, 15:58 »

Apparently they either keep them at about 80+degrees for a month in either hot water or hot air which kills off the embryonic flower stem in the set so they don't bolt......arparently :?

nobby · « **Reply #5 on:** April 02, 2008, 19:53 »

still wating for mine to arive from T&M

Nikkithefoot · « **Reply #6 on:** April 02, 2008, 20:05 »

I have had the very odd onion set bolt, but usually they had been pretty stressed ie prolongued hot dry weather. I agree though heat treating should stop it though

fatbelly · « **Reply #7 on:** April 02, 2008, 20:08 »

I planted 100 Sturon and 50 Red Baron sets last Sunday, when can I expect to see some sort of germination from the sets?

Also what type of percentage of germination should I expect?
I planted 10 Shallot sets three weeks ago and so far only 7 are showing though giving me a 70% success rate.
Thanks FB

John · « **Reply #8 on:** April 02, 2008, 20:24 »

Quote from: "fatbelly"

I planted 100 Sturon and 50 Red Baron sets last Sunday, when can I expect to see some sort of germination from the sets?

Also what type of percentage of germination should I expect?
I planted 10 Shallot sets three weeks ago and so far only 7 are showing though giving me a 70% success rate.
Thanks FB

Pretty quickly I would have thought. I'd expect to see some shooting by next weekend.

On your shallots, you might be lucky with the 3 - were they a bit rotten before you planted out?

vegmandan · « **Reply #9 on:** April 02, 2008, 20:28 »

I would think you should expect at least 90%+ success from sets and generally 100% within a fortnight.

The non sprouted shallots you have ,just give them a bit of a light tug to see if they've sent any roots down,if they have then they should be in pretty firmly and should be ok,just a bit slower to sprout, but if not they will just pull easily from the soil and they may be duff.

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Heat treated Onion Sets

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