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Where not to plant geranium


Sorry I'm not really a gardener so I hope this make sense. 

I am planting what I think is geranium as ground cover next to an area which has weed control fabric covered by a layer of stones.  The geranium seems to spread underground, will it spread under the weed control then grow up through it? 

I'm not 100% sure it is geranium, I'm guessing it is by comparing it to pictures found with google. It looks like johnson's blue,  but it doesn't flower for very long (perhaps only two weeks in the middle of summer. 



  • LynLyn Posts: 22,884

    It won’t come through the fabric, that’s what the fabric is used for!

    Johnson’s Blue flowers from summer to autumn, not just for 2 weeks.

    Gardening on the wild, windy west side of Dartmoor. 

  • Kitty 2Kitty 2 Posts: 5,150

    Hi David. Your link to Johnsons blue didn't work for me. Is it this one?....

    I don't have that variety but do have a "wargrave pink", it doesn't spread via underground runners but tends to self seed itself all over the place. 

    Can you post a photo of your plant for an ID confirmation? image

  • Hi, 


    Still got a flower on, but mostly they just disappear after a week or two.  I somehow have gained the impression that weed control fabric is mostly to keep light off the soil, so that seeds do not germinate. 

    Thanks for the help

  • LynLyn Posts: 22,884

    Could be a Rozanne mine’s still flowering now, it still won’t come through the weed fabric though, that’s the very idea of the weed proof fabric. 

    Gardening on the wild, windy west side of Dartmoor. 

  • BorderlineBorderline Posts: 4,700

    There are numerous purple/blue geraniums, and quite hard to place. Yours could be Geranium x Magnificum because it does have a short flower growing time, but depending on pruning and conditions, there may be sporadic flowering later. I'm assuming the second photo is of the main clump and not any stray new growth by the covered area? 

    If you have grown it next to the weed membrane, it's possible the plants may have grown between the membrane and the gravel. Unlikely to have come from under the membrane, unless you have planted your geraniums very close to the membrane's edge.

  • Mark56Mark56 Posts: 1,653

    Agree with Borderline, that one looks identical to my Magnificum. Just very late to the party! 

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