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Perennials

Herbaceous perennials that return year after year.

1,429 plants

Perennials in the database

Opening Act Blush Phlox (Phlox 'Opening Act Blush') — The Opening Act Blush Phlox (Phlox 'Opening Act Blush') is a compact

Perennial

Opening Act Blush Phlox

Phlox 'Opening Act Blush'

FullUSDA 3–8
'Opening Act Pink-a-Dot' Hybrid Phlox (Phlox hybrid) — It grows 22-26 inches tall and spreads 30-36 inches with an upright, mounded presence

Perennial

'Opening Act Pink-a-Dot' Hybrid Phlox

Phlox hybrid

FullUSDA 3–8
Orange African Daisy (Arctotis Hybrids 'Orange') — The Arctotis hybrid 'Orange'

Ground cover

Orange African Daisy

Arctotis Hybrids 'Orange'

FullUSDA 8–10
Orange Alstroemeria (Alstroemeria Hybrids Orange) — also known as Peruvian Lily

Perennial

Orange Alstroemeria

Alstroemeria Hybrids Orange

FullUSDA 8–10
Orange Clock Vine (Thunbergia Gregorii) — making it splendid for trellises

Ground cover

Orange Clock Vine

Thunbergia Gregorii

FullUSDA 9–11
Orange Freesia (Freesia 'Orange') — botanically termed Freesia 'Orange'

Bulb

Orange Freesia

Freesia 'Orange'

FullUSDA 3–10
Orange Gazania (Gazania Orange) — The Orange Gazania (Gazania rigens)

Ground cover

Orange Gazania

Gazania Orange

FullUSDA 9–9
Orange Libertia (Libertia Peregrinans) — which can especially set fire to the design when backlit by the sun

Perennial

Orange Libertia

Libertia Peregrinans

FullUSDA 8–10
Orange Monkey Flower (Mimulus 'Orange') — and a slightly acidic to neutral pH is beneficial for optimal growth

Perennial

Orange Monkey Flower

Mimulus 'Orange'

FullUSDA 9–10
Orange Or Brown Sedge (Carex Testacea) — Thriving in zones 6-9, it reaches 18-24 inches in height and 24 inches in width

Grass

Orange Or Brown Sedge

Carex Testacea

FullUSDA 6–11
Orange Watsonia (Watsonia Strains Orange) — Its upright growth habit and sword-like foliage add vertical interest

Perennial

Orange Watsonia

Watsonia Strains Orange

FullUSDA 9–10
Orbit Bronze Stonecrop (Sedum 'Orbit Bronze') — The Sedum 'Orbit Bronze,' or Orbit Bronze Stonecrop

Ground cover

Orbit Bronze Stonecrop

Sedum 'Orbit Bronze'

FullUSDA 3–9
Oregano (Origanum Libanoticum) — and its role in supporting local ecology; it's drought-tolerant once established

Herb

Oregano

Origanum Libanoticum

FullUSDA 3–8
Oregano (Origanum Vulgare) — herb / perennial with pink blooms; oregano is a versatile plant that requires full sun exposure for optimal growth, image 59

Herb

Oregano

Origanum Vulgare

FullUSDA 4–8
Oregano 'Santa Cruz' (Origanum X Hybridum 'Santa Cruz') — Thriving in USDA zones 7-11, it requires full sun and well-drained soil

Perennial

Oregano 'Santa Cruz'

Origanum X Hybridum 'Santa Cruz'

FullUSDA 7–9
Oriental Poppy (Papaver Orientale) — leaving a void that needs to be considered in the landscape design; perennial with pink and red blooms, image 89

Perennial

Oriental Poppy

Papaver Orientale

FullUSDA 3–9
Origami Red And White Columbine (Aquilegia 'Origami Red And White') — showcases red petals with white corolla undersides

Perennial

Origami Red And White Columbine

Aquilegia 'Origami Red And White'

HalfUSDA 3–10
Original Kobold Gayfeather (Liatris Spicata 'Kobold Original') — and small-space landscapes.<br><br>The Kobold Gayfeather is notable for its fluffy

Perennial

Original Kobold Gayfeather

Liatris Spicata 'Kobold Original'

FullUSDA 2–9
Orion Cranesbill (Geranium 'Orion') — boasts vibrant blue flowers with a white eye

Perennial

Orion Cranesbill

Geranium 'Orion'

FullUSDA 2–10
Othello Leopard Plant (Ligularia Dentata 'Othello') — preferring consistently moist

Perennial

Othello Leopard Plant

Ligularia Dentata 'Othello'

ShadeUSDA 4–8
Oxeye Daisy (Chrysanthemum Leucanthemum) — It boasts a height of approximately 1 to 3 feet and can spread out to about 1 to 2 feet

Perennial

Oxeye Daisy

Chrysanthemum Leucanthemum

FullUSDA 3–10
Pacific Bleeding Heart (Dicentra Formosa) — perennial with pink blooms; although the plant is drought-tolerant once established, consistent moisture will keep

Perennial

Pacific Bleeding Heart

Dicentra Formosa

HalfUSDA 3–8
Pacific Coast Irises (Iris Pacific Coast Hybrids) — These hybrids showcase slender, grass-like foliage, reaching 12-18 inches in height

Perennial

Pacific Coast Irises

Iris Pacific Coast Hybrids

FullUSDA 9–10
Pacific Giants (Strain) Delphinium (Delphinium Elatum 'Pacific Giants') — semi-double to double flowers

Perennial

Pacific Giants (Strain) Delphinium

Delphinium Elatum 'Pacific Giants'

FullUSDA 3–10

Photographs are credited on each plant’s page.