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Drought Tolerant Perennials

Some perennials can withstand hot temperatures and limited water availability and still be attractive. Below is a partial list of such plants.

Common Name Scientific Name Regional Adaptation
Aster (native species) Aster spp. N, SW, SC, SE, HA
Beach Wormwood Artimisia stelleriana N, SW, SC, SE, HA
Blanket Flower Gaillardia . grandiflora N, SW, SC, SE, HA
Butterfly Weed Asclepias tuberose N, SW, SC, SE, HA
Candytuft Iberis sempervirens N, SW, SC, SE
Coreopsis Coreopsis spp. N, SW, SC, SE
Globe Thistle Echinops ritro N, SW, SC, SE, HA
Lupine Lupinus spp. N, SW, SC, SE, HA
Mullein Verbascum spp. N, SW, SC, SE, HA
Orange Coneflower Rudbeckia fulgida var. sullivantii N, SW, SC, SE
Penstemon Penstemon spp. N, SW, SC, SE, HA
Purple Coneflower Echinacea purpurea N, SW, SC, SE, HA
Pussytoes Antennaria dioica N, SW, SC, SE, HA
Red Hot Poker Kniphofia uvaria SW, SC
Red Valerian Centranthus rubber SW, SC
Rock Cress Arabis caucasica N, SW, SC, SE, HA
Russian Sage Perovskia atriplicifolia SW, SC
Sage Salvia officinalis N, SW, SC, SE, HA
Sea Pink (Sand Wort) Armeria maritime N, SW, SC, SE, HA
Silver Mound Artimisia schmidtiana N, SW, SC, SE, HA
Stonecrop Sedum spp. N, SW, SC, SE, HA
Sundrops Oenothera fruticosa SW, SC, SE
Veronica Veronica spp. N, SW, SC, SE
Yarrow Achillea spp. N, SW, SC, SE, HA

Key to regional adaptation notes:
N = Northern Idaho valley locations in USDA zones 5 & 6, Moscow to Sandpoint.
SE = Southeastern Idaho valley locations in USDA zones 3 & 4 from Rexburg to Pocatello.
SC = South-central Idaho Magic Valley locations in USDA zones 4 & 5, Burley and Twin Falls.
SW = Southwestern Idaho Treasure Valley locations in USDA zones 5 & 6, Boise area (also Lewiston). HA = High altitude (>5,000 ft) areas of central, southeastern Idaho and similar locations elsewhere.


Bellflower

Bellflower prefers moist soils

Perennials for Moist Conditions

Although consistently wet or moist soils are not common, especially in southern Idaho, such sites are often created artificially in the landscape. Below is a list of plants that thrive under such conditions.

Common Name Scientific Name Regional Adaptation
Astilbe (P) Astilbe spp. N, SW, SC, SE
Bee Balm Monarda didyma N, SW, SC, SE
Bellflower Campanula glomerata N, SW, SC, SE, HA
Cardinal Flower Lobelia cardinalis N, SW, SC, SE, HA
Delphinium Delphinium elatum N, SW, SC, SE, HA
Globeflower (F) Trollius europaeus N, SW, SC
Hosta (F) Hosta spp. N, SW, SC, SE, HA
Gooseneck Loosestrife Lysimachia clethroides N, SW, SC, SE
Ligularia (Leopard Plant) Ligularia spp. N, SW, SC, SE
Queen-of-the-Prairie Fillipendula rubra N, SW, SC, SE, HA
Rock Soapwort Saponaria ocymoides N, SW, SC, SE, HA

Columbine

Columbine is among shade tolerant perennials

Shade Tolerant Perennials

Perennials can be the backbone of shade gardens. Many of these plants are native to sites where partial or full shade is prevalent. They can be valuable for situations where other plants are marginally adapted. Below is a list of perennials that thrive in partial or full shade.

Common Name Scientific Name Regional Adaptation
Alumroot (Coral Bells) (P) Heuchera sanguinea N, SW, SC, SE, HA
Astilbe (P) Astilbe spp. N, SW, SC, SE
Autumn Fern (F) Dryopteris erythrosora N, SW, SC, SE, HA
Bergenia (P) Bergenia cordifolia N, SW, SC, SE, HA
Bishop’s Goutweed (F) Aegopodium podograria N, SW, SC, SE, HA
Bleeding Heart (P) Dicentra spp. N, SW, SC, SE, HA
Bugleweed (F) Ajuga reptans N, SW, SC, SE, HA
Cardinal Flower (P) Lobelia cardinalis N, SW, SC, SE, HA
Columbine (P) Aquilegia x hybrida N, SW, SC, SE, HA
Deadnettle (F) Lamium maculatum N, SW, SC, SE, HA
Foxglove (P) Digitalis purpurea N, SW, SC, SE
Globeflower (F) Trollius europaeus N, SW, SC
Heuchera (P) Heuchera sanguinea N, SW, SC, SE, HA
Hosta (F) Hosta spp. N, SW, SC, SE, HA
Japanese Painted Fern (F) Athyrium nipponicum N, SW, SC, SE, HA
Japanese Spurge (F) Pachysandra terminalis N, SW, SC, SE, HA
Liriope (F) Liriope spp. SW
Meadowrue (F) Thalictrum spp. N, SW, SC, SE, HA
Ostrich Fern (F) Pteris modulosa N, SW, SC, SE, HA
Periwinkle (F) Vinca minor N, SW, SC, SE, HA
Red Barrenwort (P) Epimedium x rubrum N, SW, SC
Sandwort (F) Arenaria spp. N, SW, SC
Yarrow, Fernleaf (F) Achillea spp. N, SW, SC, SE, HA

(P) = can withstand partial shade conditions
(F) = can withstand full shade conditions

Key to regional adaptation notes:
N = Northern Idaho valley locations in USDA zones 5 & 6, Moscow to Sandpoint.
SE = Southeastern Idaho valley locations in USDA zones 3 & 4 from Rexburg to Pocatello.
SC = South-central Idaho Magic Valley locations in USDA zones 4 & 5, Burley and Twin Falls.
SW = Southwestern Idaho Treasure Valley locations in USDA zones 5 & 6, Boise area (also Lewiston).
HA = High altitude (>5,000 ft) areas of central, southeastern Idaho and similar locations elsewhere.

 August 17, 2012