Growing sunflowers

Discussion in 'General Gardening Discussion' started by jonnie_777, Jul 18, 2010.

  1. jonnie_777

    jonnie_777 Apprentice Gardener

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    Hi Everyone

    I am just looking for some advice on growing multi-headed sunflowers.
    The flowers are now flowering some have flowered and died, but have other heads which haven't flowered.

    Was just wondering once the main head has flowered and died should I cut it off to allow the other heads to grow.


    Thanks
     
  2. PeterS

    PeterS Total Gardener

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    Hi and welcome to the forum Johhnie.

    I have never grown sunflowers, but unless someone told me to the contrary I would cut off any heads that have finished flowering. The reason is that once a head (of any plant) has finished flowering it starts to produce seed. In the process of producing seeds it also produces chemicals that it sends back down the plant to inhibit further flowering. It is nature's way of telling a plant that once it has started to produce seed, it has done its job and doesn't need to produce any more flowers. So deadheading is good practice with most plants.
     
  3. shiney

    shiney President, Grumpy Old Men's Club Staff Member

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    Generally, if they are a multi-headed variety they don't really need to be deadheaded but the side shoots tend to flower a little time after the main one. Deadheading won't do any harm as long as you can do it without making it look ugly.

    This one, last year, had 32 blooms on it. Unfortunately some of the side flowers got so heavy that they broke their stems, where they join the main trunk, as they grow at an angle. When I saw this happening I tied the others in.



    [​IMG]
     
  4. PeterS

    PeterS Total Gardener

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    Shiney- thats a lovely plant.

    As I said I have never grown Sunflowers, but looking at yours - perhaps I should. I like that dark colour, and the fact that it has multiple heads.

    I would really appreciate some details please. Was it from seed or bought, its cultivar name, how high does it get and could it be grown in a pot?
     
  5. shiney

    shiney President, Grumpy Old Men's Club Staff Member

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    Hi Peter,

    The plant has been admired by many people and this year we have grown them from last year's seed.

    We don't know what variety it is as the seeds were given to us last year by a friend - from their previous years' plants.

    That plant grew about 7ft tall and the main stem was nearly 2" diameter - which I suppose it needs if it is going to support so many side shoots. The side shoots grew from the leaf nodes just like the ones you pinch out from tomato plants.

    This year they are still growing true from seed.

    If you grew it in a pot I would guess that would restrict its growth - probably reduce its height and the number of side shoots but I don't really have any idea.

    I'll save you some seeds and you can experiment next year. :thumb:
     
  6. PeterS

    PeterS Total Gardener

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    Many thanks for the info Shiney and the kind offer of some seeds. - I would love some. :gnthb:
     
  7. Alice

    Alice Gardener

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    They are just lovely Shiney. Great colour.
    I'm growing some multi-headed ones too, but they're yellow. They're just about to come into flower. I hope they will be as nice as yours.
     
  8. Sussexgardener

    Sussexgardener Gardener

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    You could try some of the ones that don't get quite so high. I usually sow some of them each year, but couldn't be bothered this year - they can reach knee height and have the added advantage of not needing staking and supporting.
     
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