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No flowers on my Cosmos !!

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  • B3B3 Posts: 27,505

    My non-flowering cosmos are at last covered in buds. If the frost holds off for a couple of weeks, I might even see some flowers. Fingers crossedimage

    In London. Keen but lazy.
  • After waiting weeks and weeks for the flowers to arrive I now have a fantastic display of DARK PINK cosmos flowers with very few white ones !!!!    I purchased the seeds all white from a well known supplier T and M, had 2 packets replaced due to poor germination .............another e.mail and photographs on its way to said seed supplier.........will keep you all informed !!

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  • B3B3 Posts: 27,505

    More buds. all swelling. Fingers still crossed for no frost.

    In London. Keen but lazy.
  • kamfamkamfam Posts: 1

    This year all of ours are at least twice as big as pervious years, most have flowered beautifully. However  three Giants have only just come into bud and the biggest that has just  produced its first bloom blew over this mornin

  • Just an update on last years post re White Cosmos or rather lack of it !!!

    Sadly the 2 packs of replacement seeds sent to me  resulted in a dazzling display of dark pink !!!! sent photo and e.mail to T and M but no response ,,,,,,..have bought good old Wilko gazebo white for a pound a packet already got them going under cover and looking good !!!  Anyone had any success with Sarah Raven dwarf cosmos seeds ...Dwarf Sensation White ???

  • I have grown cosmos for 45 years and would normally consider them to be amongst the most reliable HHAs.  However, last year only about 40% of my plants flowered and this year it's about 25% only so far.  The variety is Sensation Mixed and seedlings were planted out in front and back gardens in Bedfordshire and in a SW facing garden in South Devon.  Have others experienced this problem? 

    We also sowed a dwarf cosmos and they have flowered profusely.

  • BobTheGardenerBobTheGardener Posts: 11,384

    I'm growing dwarf variety Sonata mixed from seed this year which are just starting to flower.  They are 3ft tall though (supposed to be 2ft) but at least they are dwarf compared to the ones I grew last time, which were 5-6ft tall monsters!

    A trowel in the hand is worth a thousand lost under a bush.
  • LMHmedchemLMHmedchem Posts: 15

    If you do feed them, make sure to use a feed that is a bloom booster and not a general feed. This just  means no nitrogen. I use on of these,

    Alaska Morbloom Concentrate 0-10-10 Fertilizer, 1 gallon ($25)

    https://www.amazon.com/s/ref=nb_sb_noss/139-3548329-8039507?url=search-alias%3Dlawngarden&field-keywords=Fish+Fertilizer+0-10-10

    Liquinox 0-10-10 Bloom, 1 gallon ($20)

    https://www.amazon.com/Liquinox-0-10-10-Bloom-1-gallon/dp/B00FGIIZHQ/ref=sr_1_2?s=lawn-garden&ie=UTF8&qid=1501371134&sr=1-2&keywords=Fertilizer+0-10-10

    This is not exactly an organic approach, but I do like to use these products since they are the by-products of the fishing industry and are material that would otherwise have to be disposed of. I use this at 2tbl/1.5 gallon (standard watering can) once a week until my flowers are full of blooms. I use the 5-1-1 version once a week after planting until the plants are nice and full and leafy and then switch to the bloom booster.

    The gallons on amazon are the best value and will often last several years depending on how many plants you have.

    LMHmedchem

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