Perennials for Non-Stop Bloom

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Yellow corydalis (Pseudofumaria lutea, syn. Corydalis lutea) is one of the longest-blooming perennials: from May to October, it is never without flowers.

Most perennials bloom for about 2 weeks. That means that, for a garden that is constantly in bloom, you have to plant a mix of very early, early, mid-season, late and very late perennials. And adjust the mix, again and again, until you get it right. That is doable, but… why not cheat and rely instead on perennials with a naturally long blooming season?

All the plants described below bloom for at least 6 weeks and most for 8 weeks and more. Even within this group, there are plants that bloom early, in the middle of the summer and late in the fall. So, with 3 or 4 with long-blooming perennials, it’s easy to cover the whole season.

This list is far from complete – to include all cultivars with prolonged blooming, would have required a list 10 times longer! – but at least it will give you a few suggestions you can build on when renovating a garden or start a new one.

Long-blooming perennials simply make a gardener’s life that much easier!

Variety      Months of Bloom       Hardiness zones

  1. African Sun sundrops (Oenothera ‘African Sun’) 6-10 zone 4
  2. Anise-hyssop (Agastache ‘Blue Fortune’) 7-9 zone 5
  3. Anne Folkard geranium (Geranium ‘Anne Folkard’) 6-10 zone 5
  4. Anne Thomson geranium (Geranium ‘Anne Thomson)   6-10 zone 5
  5. Armenian geranium (Geranium psilostemon) 6-8 zone 5
  6. Aster (Aster spp.) 8-10 zone 4
  7. Baby’s breath (Gypsophila paniculata) 6-8 zone 4
  8. Balloonflower (Platycodon grandiflorum) 8-9 zone 3
  9. Becky Shasta daisy (Leucanthemum x superbum ‘Becky’) 6-10 zone 4
  10. Black-eyed Susan (Rudbeckia hirta) 7-10 zone 3
  11. Bloody geranium (Geranium sanguineum) 6-8 zone 3
  12. Broad-leaved bellflower (Campanula latifolia) 6-8 zone 3
  13. Carpathian bellflower (Campanula carpatica) 6-8 zone 3
  14. Catmint (Nepeta spp.) 6-9 zone 4
  15. Caucasian scabious (Scabiosa caucasica) 7-9   zone 4
  16. Checkermallow (Sidalcea spp.) 7-8 zone 4
  17. Chocolate snakeroot (Ageratina altissima ‘Chocolate’) 9-11 zone 3
  18. Cinquefoil (Potentilla spp.) 6-8 zone 3
  19. Common sundrops (Oenothera tetragona ‘Fyrverkeri’, syn. ‘Fireworks’) 6-8 zone 3
  20. Common yarrow (Achillea millefolium) 6-9 zone 2
  21. Coral bells (Heuchera x brizoides) 6-9 zone 3
  22. Corsican pansy (Viola corsica) 5-10 zone 3
  23. Culver’s root (Veronicastrum virginiana) 7-9 zone 3
  24. Cupid’s dart (Catananche caerulea) 7-9 zone 4
  25. Cutleaf coneflower (Rudbeckia laciniata) 7-10 zone 3
  26. Echinacea (Echinacea purpurea) 7-9 zone 3
  27. El Desperado daylily (Hemerocallis ‘El Desperado’) 7-8 zone 3
  28. Elecampagne (Inula ensifolia) 7-8 zone 3
  29. False sunflower (Heliopsis helianthoides) 7-9 zone 3
  30. Fernleaf yarrow (Achillea filipendulina ‘Coronation Gold’) 6-9 zone 3
  31. Field scabious (Knautia arvense) 7-9 zone 4
  32. Firecracker loosestrife (Lysimachia ciliata ‘Atropurpurea’, syn. ‘Fire Works’) 7-8 zone 3
  33. Fleabane daisy (Erigeron speciosus) 7-8 zone 3
  34. Frosty Fire cheddar pink (Dianthus gratianopolitanus ‘Frosty Fire’) 6-9 zone 3
  35. Gaillardia (Gaillardia x grandiflora) 7-10 zone 2
  36. Gayfeather (Liatris spp.) 7-9 zone 3
  37. Globe thistle (Echinops spp.) 7-8 zone 3
  38. Golden Gate daylily (Hemerocallis ‘Golden Gate’) 7-8 zone 3
  39. Golden marguerite (Anthemis tinctoria)   7-9 zone 3
  40. Gooseneck loosestrife (Lysimachia clethroides) 7-9 zone 3
  41. Great white fleeceflower (Persicaria polymorpha, syn. Polygonum polymorphum) 6-9 zone 3
  42. Happy Returns daylily (Hemerocallis ‘Happy Returns’’) 6-8 zone 3
  43. Himalaya fleeceflower (Persicaria affinis, syn. Polygonum affine) 6-10 zone 4
  44. Japanese aster (Kalimeris pinnatifida ‘Hortensis’) 7-9 zone 4
  45. Johnson’s Blue geranium (Geranium ‘Johnson’s Blue’) 6-9 zone 3
  46. Knautia (Knautia macedonica) 7-9 zone 4
  47. Largeflower coreopsis (Coreopsis grandiflora) 6-10 zone 3.
  48. Lavender (Lavandula angustifolia) 6-8 zone 5
  49. Maltese cross (Lychnis chalecodonica) 7-8 zone 4
  50. Masterwort (Astrantia major) 7-9 zone 4
  51. Mini Pearl daylily (Hemerocallis ‘Mini Pearl’) 6-8 zone 3
  52. Missouri evening primrose (Oenothera missouriensis) 6-9 zone 3
  53. Musk mallow(Malva moschata) 6-9 zone 3
  54. Narrow-leaved sundrops (Oenothera fruticosa) 6-8 zone 4
  55. Narrow-spiked ligularia (Ligularia stenophylla ‘The Rocket’) 7-8 zone 4
  56. Obedient plant (Physostegia virginiana) 7-9 zone 2
  57. Orange coneflower (Rudbeckia fulgida sullivantii) 7-9 zone 3
  58. Orchid Candy daylily (Hemerocallis ‘Orchid Candy’) 6-8 zone 3
  59. Pacific bleeding-heart (Dicentra formosa) 6-10 zone 3
  60. Pandora’s Box daylily (Hemerocallis ‘Pandora’s Box’) 7-8 zone 3
  61. Pardon Me daylily (Hemerocallis ‘Pardon Me’) 7-8 zone 3
  62. Perennial flax (Linum perenne) 6-8 zone 2
  63. Perennial sage (Salvia nemorosa & S. x sylvestris) 6-8 zone 4
  64. Pink coreopsis (Coreopsis rosea) 7-8 zone 3
  65. Pink evening primrose (Oeonothera speciosa ‘Rosea’) 6-9 zone 5
  66. Przewalksi’s ligularia (Ligularia przewalskii) 7-8 zone 4
  67. Purple Waters daylily (Hemerocallis ‘Purple Waters’) 6-7 zone 3
  68. Radiant Greetings’ daylily (Hemerocallis ‘Radiant Greetings’) 7-8 zone 3
  69. Red valerian (Centranthus ruber) 6-10 zone 3
  70. Rose campion (Lychnis coronaria) 7-8 zone 3
  71. Royal Candles Speedwell (Veronica ‘Royal Candles) 6-8 zone 3
  72. Rozanne geranium (Geranium ‘Rozanne’) 6-10 zone 3
  73. Russian sage (Perovskia atriplicifolia) 8-10 zone 4
  74. Sea holly (Eryngium spp.) 7-9 zone 3
  75. Sea thrift (Armeria maritima) 5-7 zone 3
  76. Showy stonewort (Sedum spectabile, now Telephium spectabile) 8-10 zone 2
  77. Siloam Ury Winniford daylily (Hemerocallis ‘Siloam Ury Winniford’) 7-8 zone 3
  78. Small scabious (Scabiosa columbaria) 7-8 zone 3
  79. Sneezeweed (Helenium autumnale) 8-9 zone 3
  80. Spiderwort (Tradescantia x andersoniana) 6-9 zone 4
  81. Spike speedwell (Veronica spicata) 6-8 zone 3
  82. Stella de Oro daylily (Hemerocallis ‘Stella de Oro’) 6-9 zone 3
  83. Thread leaf coreopsis (Coreopsis verticillata) 6-10 zone 3
  84. Tree lavatera (Lavatera thuringiaca) 7-9 zone 4
  85. Viola (Viola spp.) 5-9 zone 3
  86. Wargrave Pink geranium (Geranium endressii ‘Wargrave Pink’) 6-7 zone 4
  87. Water forget-me-not (Myosotis scorpioides ‘Semperflorens’) 6-8 zone 3
  88. Yellow corydalis (Corydalis lutea, now Pseudofumaria lutea) 5-10 zone 4
  89. Yellow loosestrife (Lysimachia punctata) 6-7 zone 3
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2 thoughts on “Perennials for Non-Stop Bloom

  1. Months of bloom is a tricky term. When I first read the list I was all “WHERE are these planted that they bloom for 6 to 9 months!!!???” Eventually my logic kicked in. Thanks for a great list.

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