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Where to put these tall varieties - Cosmos purity and Campanula & planting partners

UpNorthUpNorth South Leeds, West Yorkshire, UK Posts: 376
Where to put Cosmos Purity (1.2m tall) and campanula latifolia alba (1.5m tall) ?

I have also loads of Achillea (white) said to be 60cm.

all growing from seed this year.  all still quite small, but healthy   

i have an eye on a large trough for some of them.  fairly large/deep thing. 

main question really, how sturdy are these two (larger) plants and how large might they grow in year one ( assume Annual cosmos would reach full height if well looked after)?    

from a design point of view, does anyone think they would or would not work well together?  What planting partners required/suggested?   

Any suggestions welcome...thanks.

Posts

  • hogweedhogweed Central ScotlandPosts: 4,037
    Don't know if it's just me but some cosmos I grow stay fairly tall and skinny while other plants are the size of a medium shrub! Up till now I've only ever grown the pink varieties although have Purity ready to plant out. 
    'Optimism is the faith that leads to achievement' - Helen Keller
  • Blue OnionBlue Onion Posts: 2,900
    Could you put a flower frame in the trough?  With the elevation and a bit of wind, I would worry about cosmos and the others snapping.. their stems are not woody.  The Achillea should be okay, though.  

    Something like this?
    Related image
    Utah, USA.
  • Unless it's a *very* large trough, I wonder if the height of two of those might  look out of proportion.. bearing in mind the taller varieties of Cosmos frequently (they do in my garden anyway) reach a height well above that stated.  Though you could keep pinching out the Cosmos so shorter/bushier I guess.
  • Blue OnionBlue Onion Posts: 2,900
    The cosmos are so bushy with lower down foliage, and occasional flowers.. and with the Achillea foliage low down covering the edges.. I think it would look beautiful.  If there is space, a 'spiller' would be a nice addition too.  
    Utah, USA.
  • UpNorthUpNorth South Leeds, West Yorkshire, UK Posts: 376
    thanks for the thoughts on this everyone.  I just realised i have a lot of ferns, could put a fern in the middle, or may be one each end, that would spill down a little.  I will wait while it's at it's best and pop some photos back here.  Further thoughts/ideas welcome though, i won't be touching it for another day or so.
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