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Anyone started there cosmos seeds yet?

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  • Natalie LNatalie L Posts: 125

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  • Natalie LNatalie L Posts: 125

    Hi all would I be able to sow the above? They were cheap from home bargains and I thought I'd give it a go, I've never done it before can anyone help? Will they turn out like your lovely ones? Would they be ok to sow in the next few weeks? Thank you

  • Busy-LizzieBusy-Lizzie Posts: 24,036

    You will need to sow them in pots or seed trays and keep them on a warm window sill, at least 20°. Nasturtium isn't so fussy and can wait a bit. Do you have a propagator or a greenhouse or conservatory? They will need potting up when big enough to handle then keeping in a light frost free place. If you haven't anywhere suitable then don't sow them yet, but Lobelia and Busy-Lizzies can take a little time to get going.

    Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
  • Natalie LNatalie L Posts: 125
    Hi no I do not, I have a shed and a garage. Would either be ok? When you say warm window sill, do you mean warn from the radiator or from the sun? How far apart would you place each seed? I read somewhere that you cover in a bag? Thank you
  • Gardengirl..Gardengirl.. Posts: 4,172

    Natalie L  I would sow the Verbena cover with a fine layer of compost, Petunia sow on surface of compost and Lobelia sow and lightly cover - sow in clumps in cell trays as when you see them for sale they are lots of seeds together

    Wait a bit for the morning glory and the nasturtium till end of March or Beginning to middle of April to start off

    Not sure with the busy lizzie 

    They should turn out nice - if doing straight into a basket put it into a GH or coldframe

    Think I will wait till end of March to sow my cosmos seeds

    Hampshire Gardener
  • Busy-LizzieBusy-Lizzie Posts: 24,036

    Warm from a radiator, sun isn't there at night. Some seeds, like petunia and lobelia are tiny, hardly placeable.

    https://www.rhs.org.uk/advice/profile?pid=501  click for advice.

    Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
  • Natalie LNatalie L Posts: 125

    Thank you image

  • A bit of advice please.

    I have sown my cosmos seeds in early march on a windowsill and some more a week later, however they do not appear to have germinated. Was this too soon and should i wait a bit longer. i did about four trays in small seed trays and absolutely nothing as yet. I have a cold greenhouse should I put them in there and try again. Would welcome your thoughts. North west area

  • Thought I would resurrect this link from an old post as it shows average dates for frost free zones taken from local weather stations:



    http://www.overthegardengate.net/garden/frostsurvey.asp



    It is the big differences in day and night temps that can cause seedling fails as well as poor light levels. Better constant warmth 20C (or constant cool 15C) than roller coaster temps.
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