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The database

Perennials

Herbaceous perennials that return year after year.

1,429 plants

Perennials in the database

Joe Pye Weed (Eupatorium Purpureum) — with a spread of about 2 to 4 feet; it showcases fluffy, mauve-pink flower clusters atop tall stems with, image 59

Perennial

Joe Pye Weed

Eupatorium Purpureum

FullUSDA 4–8
Johnson's Blue Cranesbill (Geranium 'Johnson's Blue') — It presents a vigorous spreading habit; and sporadically continuing until the first frost if deadheaded

Ground cover

Johnson's Blue Cranesbill

Geranium 'Johnson's Blue'

FullUSDA 2–10
Judith Daylily (Hemerocallis 'Judith') — This hardy plant flourishes in USDA zones 3-9

Perennial

Judith Daylily

Hemerocallis 'Judith'

FullUSDA 6–11
June Hosta (Hosta 'June') — perennial with lavender blooms

Perennial

June Hosta

Hosta 'June'

HalfUSDA 3–9
Jupiter's Beard, Red Valerian (Centranthus Ruber) — It thrives in USDA zones 5-9, reaching heights of 2-3 feet with a similar spread

Ground cover

Jupiter's Beard, Red Valerian

Centranthus Ruber

FullUSDA 4–10
Kahili Ginger (Hedychium Gardnerianum) — perennial for full or half or shade; and visually captivating element that elevates the sensory experience of their

Perennial

Kahili Ginger

Hedychium Gardnerianum

FullUSDA 8–10
Kalanchoe (Kalanchoe Blossfeldiana) — a common issue in wet conditions; often with scalloped edges, image 77

Perennial

Kalanchoe

Kalanchoe Blossfeldiana

FullUSDA 10–11
Kangaroo Paws, Red (Anigozanthos Hybrids) — They bloom in vibrant red hues atop long stems reaching up to 4 feet high

Perennial

Kangaroo Paws, Red

Anigozanthos Hybrids

FullUSDA 9–11
Kangaroo Paw 'Yellow' (Anigozanthos 'Yellow') — Typically reaching 2-3 feet in height and 1-2 feet in spread

Perennial

Kangaroo Paw 'Yellow'

Anigozanthos 'Yellow'

FullUSDA 8–10
Karl Rosenfield Peony (Paeonia 'Karl Rosenfield') — a cherished peony cultivar

Perennial

Karl Rosenfield Peony

Paeonia 'Karl Rosenfield'

FullUSDA 3–8
Kenilworth Ivy (Cymbalaria Muralis) — Cymbalaria muralis is an excellent choice for cascading over walls; native to Europe and the Mediterranean, image 71

Perennial

Kenilworth Ivy

Cymbalaria Muralis

Deep ShadeUSDA 5–8
Kent Beauty Oregano (Origanum 'Kent Beauty') — commonly referred to as Kent Beauty Oregano

Herb

Kent Beauty Oregano

Origanum 'Kent Beauty'

FullUSDA 5–9
Key Lime Pie Coral Bells (Heuchera 'Key Lime Pie') — ruffled lime-green foliage reaching 8 to 12 inches in height and spreading 12 to 18 inches wide

Perennial

Key Lime Pie Coral Bells

Heuchera 'Key Lime Pie'

HalfUSDA 3–10
Kim's Knee High Coneflower (Echinacea 'Kim's Knee High') — Kim's Knee High Coneflower (Echinacea 'Kim's Knee High') is a dwarf perennial

Perennial

Kim's Knee High Coneflower

Echinacea 'Kim's Knee High'

FullUSDA 3–9
King Of Bleeding Hearts (Dicentra 'King Of Hearts') — commonly known as King of Bleeding Hearts

Perennial

King Of Bleeding Hearts

Dicentra 'King Of Hearts'

HalfUSDA 3–9
Kirengeshoma (Kirengeshoma Koreana) — clump-forming habit that is both tidy and low-maintenance; yellow flowers in the garden

Perennial

Kirengeshoma

Kirengeshoma Koreana

Deep ShadeUSDA 5–8
'Kit Kat' Catmint (Nepeta X Faassenii 'Kit Kat') — Nepeta x faassenii 'Kit Kat' is a compact perennial

Perennial

'Kit Kat' Catmint

Nepeta X Faassenii 'Kit Kat'

FullUSDA 3–8
Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial with pink and red blooms; pink flowers that gradually deepen to a rich crimson, image 104

Ground cover

Knotweed

Persicaria Affinis 'Superba'

FullUSDA 4–7
Kopper King Hardy Hibiscus (Hibiscus moscheutos 'Kopper King') — is renowned for its striking

Perennial

Kopper King Hardy Hibiscus

Hibiscus moscheutos 'Kopper King'

FullUSDA 4–9
Kreb's African Daisy (Gazania Krebsiana) — colloquially known as Krebs' African Daisy

Ground cover

Kreb's African Daisy

Gazania Krebsiana

FullUSDA 7–10
Kris Plant (Alocasia Sanderiana) — It flourishes under dappled light

Perennial

Kris Plant

Alocasia Sanderiana

ShadeUSDA 9–11
Krossa Regal Hosta (Hosta 'Krossa Regal') — Ideal for shady areas, this hosta requires well-drained soil with moderate moisture

Ground cover

Krossa Regal Hosta

Hosta 'Krossa Regal'

HalfUSDA 2–9
Kudos Coral Dwarf Hummingbird Mint (Agastache 'Kudos Coral') — The Agastache 'Kudos Coral' is a vibrant perennial known for its bright coral blooms

Perennial

Kudos Coral Dwarf Hummingbird Mint

Agastache 'Kudos Coral'

FullUSDA 4–10
Kudos Mandarin Dwarf Hummingbird Mi (Agastache 'Kudos Mandarin') — perfect for thoughtful landscape designs

Perennial

Kudos Mandarin Dwarf Hummingbird Mi

Agastache 'Kudos Mandarin'

FullUSDA 4–9

Photographs are credited on each plant’s page.