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Purple / Blue Perennial Recommendations

harmonyharmony Posts: 403
in Plants
I'm looking for a purple or blue  perennial for the back of a sunny border to grow between shrubs ( hypericum and potentillas all yellow and orange ). I want something upright that won't flop and long flowering if possible but mainly for flowering summer/autumn. Any recommendations please..
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Posts

  • AnniDAnniD Posts: 12,585
    Veronica longifolia
    https://www.bethchatto.co.uk/conditions/plants-for-general-conditions/veronica-longifolia.htm

    Or Veronica spicata perhaps? 
    https://www.claireaustin-hardyplants.co.uk/products/veronica-spicata-1
  • harmonyharmony Posts: 403
    Thanks for that, they both look ideal. Thankyou..
  • raisingirlraisingirl Posts: 7,093
    Perovskia perhaps
    Gardening on the edge of Exmoor, in Devon

    “It's still magic even if you know how it's done.” 
  • BluejaywayBluejayway Posts: 392
    Phlox?
  • Pete.8Pete.8 Posts: 11,340
    I'm trying to get a lot more blue in my borders and it's not easy.
    Veronica Spicata is good - easy from seed and they also self-seed well.
    I've recently added Penstemon Electric Blue and Caryopteris (not really thriving though).
    Best are my favourites - Delphiniums! but I can't grow them as always decimated by slugs. I bought 12 a few years ago - not one appeared the following year - just a lots of slug trails :(
    Blue scabious
    Thalictrum delavayi
    Verbena - all varieties
    Platycodon (also self seed easily)
    Hardy geraniums



    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • WAMSWAMS Posts: 1,960
    raisingirl said:
    Perovskia perhaps
    It's looking great just now when the thalictrum and delphiniums have stopped 👍 
  • SalixGoldSalixGold Posts: 450
    I find perovskias can flop. Eryngium, echium. Train clematis (herbaceous, group 2 or 3) up fences or obelisks. Baptisia - less likely to flop in full, full sun and in poorer soil. Tree dahlias.

    Shrubby salvias - in the So Cool series - blue or purple (very upright) - but not tall enough for the back of a border.


  • djosmond41djosmond41 Posts: 6
    Monkshood is reliable and a good blue doesn't seem prone to pests, there is a yellow one which paired together with the blue would be amazing
  • Nanny BeachNanny Beach Posts: 8,719
    All parts of the monkshood are very toxic. What about salvia amistad. There are a couple of very blue Hebes I don't know the names unfortunately. Roses,I have Rhapsody in blue,and Blue by You, often flowering still in November. Erygiums,a beautiful blue, but where I live they do need staking. You can get very tall varieties of both nepeta and lavender.
  • joanna65joanna65 Posts: 75
    What about Salvia black and blue? 
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