Starting onion seeds

Discussion in 'Fruit and Veg Gardening' started by Brian1985, Jan 15, 2019.

  1. Canadian Lori

    Canadian Lori New Seed

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    On the counter over the dishwasher, in front of the newer fridges on the floor because that is where they vent, on top of the satellite receiver, and the list goes on.
     
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  2. mart

    mart Strong Ash

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    Room temperature is fine to start as long as its about 70 to 75 degrees !
     
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  3. Cayuga Morning

    Cayuga Morning Strong Ash Plants Contributor

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    I use a heat mat and a cover only for germination. Once they are up, I take the cover off, remove them from the mat & get them under lights. Upon the advice of Margaret Roach , I plan to put a thin coat of sterile sand on top of the potting mix to reduce chance of damping off.
     
  4. Brian1985

    Brian1985 Seedling

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    Hey guys I have decided to use my old heat mat and hope I don't fry the seeds. I'm not totally confident it works right. But hopefully it will work until I get my other heat mat. Thanks for all your guys help.
     
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  5. Sjoerd

    Sjoerd Mighty Oak

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    Say Cayu--just be sure that the sand is rough sand (grit)...that is to say not fine.
    Have a look at this old BBC episode from the series, "Life In A Cottage Garden", featuring Carol Klein.
    I like Carol because we do so many things exactly the same. The portion of the vid of interest to you would be close to the beginning: ~two minutes in.
     
    Last edited: Jan 21, 2019
  6. Canadian Lori

    Canadian Lori New Seed

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    Sand also discourages fungus gnats.
     
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  7. Brian1985

    Brian1985 Seedling

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    What about the lights? For my peppers and tomatoes last year I did 16 hours on 8 hours off. Would this be good for the onions as well?
     
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  8. carolyn

    carolyn Strong Ash

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    yes. same lighting unless you are growing short day onions. which I assume you are not.
     
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  9. Brian1985

    Brian1985 Seedling

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    No I believe they are long day onions
     
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  10. Canadian Lori

    Canadian Lori New Seed

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    I start with 14 hours and then usually by the time it is okay to plant out (around April 28th-30th) it is 14 hours of natural daylight and days are getting longer. Onions can go out sooner than other annuals because they've got built in "anti freeze".
     
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  11. Brian1985

    Brian1985 Seedling

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    Hey guys I planted my onions today. I just checked on my heat mat and its 1.4 degrees above set temp I set it at 77 degrees Fahrenheit. It's still heating and I'm wondering at what temp can onion seeds fry?
     
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  12. adam.ca

    adam.ca In Flower

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    Onion germination is fastest as 68-77°F (20-25°C), with slight temperature drops at night.
    most seeds 80oF is perfect, but this is a cold weather crop.
     
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  13. Canadian Lori

    Canadian Lori New Seed

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    I started mine on the 16th, yesterday one of the seedlings popped up. That's 7ndays. At first I thought it must have been a stray non onion seed but it is the correct shape. Don't know what expedited it...
     
  14. Brian1985

    Brian1985 Seedling

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    How long should it take? I was thinking 5-10 days.
     
  15. Canadian Lori

    Canadian Lori New Seed

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    Normally about 14 to 21 days. That is why I was startled :)
     
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