Leggy Cosmos seedlings?

Hello all, 

I have sown a mixture of summer-flowering perennials and annuals in plugs in a propagator.

All are doing well and behaving as expected, with the exception of the Cosmos which have all shot up 4-6 inches of spindly pale shoots.  

Is this ok?  Will it settle down, or should I cut losses and start again with the cosmos?

thanks in advance.


  • Kitty 2Kitty 2 ManchesterPosts: 5,120

    Seedlings get leggy when they're looking for more light. I take them off the heat and move to a bright windowsill once they've germinated.

    I've found that cosmos seeds take off like a rocket, even without the benefit of a heated propagator.  You can pot them on into deeper pots, bury them "up to the shoulders"  (the first seed leaves).  If you have a couple of pairs of true leaves I would pinch them back. This will make them grow bushier.

    There's still time to sow more seed if you prefer. 

  • That's great, thank you.

  • Bright starBright star Wrea GreenPosts: 695

    Same thing happened to most of my seedlings too, I did as kitty suggested and they are now outside in a seedling cloch and are doing fine. 

    Life's tragedy is that we get old too soon and wise too late.

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