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Category Name Othername Zone Size Growthrate Water Pollination Bloom Color Time Light Comments
Perennials MOUNTAIN BASKET OF GOLD Alyssum montanum 3 6-10'' X Yellow Spring Sun Low trailing stems with gray leaves
Perennials MAT DAISY Anacyclus depressus 5 4'' X White Early summer Sun Flowers close during cloudy weather or evening to reveal red backs; reseeds
Perennials SUMMER FORGET-ME-NOT Anchusa azurea 3-4'' XX Bright blue Early summer Sun Prized for showy blue flowers dry clay OK with occasional deep water
Perennials SNOWDROP ANEMONE Anemone sylvestris 3 12-18'' X White Spring Sun or pt sh Charming spreading plant can rebloom through summer and fall
Perennials PUSSYTOES Antennaria dioica 2 4'' GC XXX Pink buds Early summer Sun or pt sh Native dense carpet of silvery leaves pink buds open to fuzzy flowers
Perennials GOLDEN MARGUERITE Anthemis tinctoria 3 12-18'' XX Yellow Summer Sun Ferny foliage topped by long-stemmed yellow daisies reseeds
Perennials BARNEBY'S COLUMBINE Aquilegia barnebyi 3 8-18'' XX Yellow & red Early summer Sun-shade Delicate-looking but native to our shale soils
Perennials ROCKY MOUNTAIN BLUE COLUMBINE Aquilegia caerulea 2 1-2'' XX Blue & white Spring-early summer Sun or shade Colorado's state flower will tolerate dry conditions especially in some shade
Perennials WILD EASTERN COLUMBINE Aquilegia canadensis 3 1-2'' X Yellow & red Lt spr-earl sum Shade-pt sha Small delicate flowers; can reseed
Perennials YELLOW COLUMBINE Aquilegia chrysantha 3 30'' XX Yellow Lt spr-early summer Sun-pt sh Native that tolerates dry conditions if in shade; also carry 'Denver Gold' the Plant Select variety with huge flowers
Perennials HYBRID COLUMBINE Aquilegia X hybrids 3 1-3'' M Varies Spring Sun ' shade Flowers may be blue red pink purple yellow white or mixed; also carry varieties with double flowers
Perennials ROCK CRESS Arabis caucasica 4 4-6'' M White Spring Sun Small mounding plant good for edging or in rock garden
Perennials SANDWORT Arenaria montana 3 4'' GC X White Late spring Sun Evergreen foliage great ground cover
Perennials TANGERINE SOUTHERNWOOD Artemisia abrotanum 5 2-3'' XXX Insignificant Sun Dark green feathery foliage on a tough plant
Perennials FRINGED SAGE Artemisia frigida 6-15'' XXX Insignificant Sun Native with silvery foliage
Perennials VALERIE FINNIS WORMWOOD Artemisia ludoviciana 5 24'' XXX Insignificant Sun Grown for silvery gray foliage can be invasive
Perennials SILVER MOUND Artemisia schmidtiana 4 6-8'' XX Insignificant Sun Soft ferny silvery foliage. Cut back in summer to keep compact
Perennials POWIS CASTLE ARTEMISIA Artemisia x 'Powis Castle' 5 12-24'' XXX No flowers Sun Tough plant with ferny silvery foliage. Cut back in early spring
Perennials SEAFOAM ARTEMESIA Artemesia versicolor x 4 10'' XXX Insignificant Sun Curly silver foliage on branches spreading 18' good ground cover under xeric shrubs or perennials
Perennials BUTTERFLY WEED Asclepias tuberosa 4 12-18'' X Orange Summer Sun Large clusters of flowers attract butterflies