The database

Perennials

Herbaceous perennials that return year after year.

1,429 plants

Inside-out Flower (Vancouveria Hexandra) — commonly called American Barrenwort

Inside-out Flower

Vancouveria Hexandra

Full · Zones 3–9

Irene Nuss Begonia (Begonia 'Irene Nuss') — The Begonia 'Irene Nuss', a lush, tropical perennial, thrives in partial shade with indirect sunlight

Irene Nuss Begonia

Begonia 'Irene Nuss'

Half · Zones 3–10

Irene Rosemary (Rosmarinus Officinalis 'Irene') — commonly named Irene Rosemary

Irene Rosemary

Rosmarinus Officinalis 'Irene'

Full · Zones 8–10

Irish Moss (Sagina Subulata) — commonly known as Irish Moss

Irish Moss

Sagina Subulata

Full · Zones 4–10

Iris Species (Iris Spp.) — offer a captivating array of colors, often with intricate patterns

Iris Species

Iris Spp.

Full · Zones 7–9

Iron Butterfly Vernonia (Vernonia Lettermanii 'Iron Butterfly') — The Iron Butterfly Speedwell

Iron Butterfly Vernonia

Vernonia Lettermanii 'Iron Butterfly'

Full · Zones 4–9

Iron Cross Begonia (Begonia Masoniana) — is a distinctive perennial known for its broad

Iron Cross Begonia

Begonia Masoniana

Full · Zones 3–10

Island Alum Root (Heuchera Maxima) — The Island Alum Root, Heuchera maxima, thrives in USDA zones 8-10

Island Alum Root

Heuchera Maxima

Half · Zones 7–10

Island Bush Snapdragon (Gambelia Speciosa) — The Island Bush Snapdragon (Gambelia speciosa) is a vibrant evergreen shrub

Island Bush Snapdragon

Gambelia Speciosa

Full · Zones 8–10

Island Pink Yarrow (Achillea Millefolium 'Island Pink') — drought-tolerant perennial

Island Pink Yarrow

Achillea Millefolium 'Island Pink'

Full · Zones 3–10

Ivory Prince Hellebore (Helleborus 'Ivory Prince') — The Ivory Prince Hellebore (Helleborus 'Ivory Prince') is a captivating evergreen perennial

Ivory Prince Hellebore

Helleborus 'Ivory Prince'

Full · Zones 4–9

Jack-In-The-Pulpit (Arisaema Triphyllum) — is a captivating woodland perennial

Jack-In-The-Pulpit

Arisaema Triphyllum

Deep Shade · Zones 4–9

Jacob Cline Bee Balm (Monarda Didyma 'Jacob Cline') — growing up to 4-6 feet in height and 2-3 feet in spread

Jacob Cline Bee Balm

Monarda Didyma 'Jacob Cline'

Full · Zones 4–7

Jacob's Ladder (Polemonium Reptans) — Jacob's Ladder (Polemonium reptans) is a charming perennial, thriving in USDA zones 3-8

Jacob's Ladder

Polemonium Reptans

Half · Zones 3–8

Jacob's Ladder (Polemonium 'Stairway To Heaven') — Jacob's Ladder 'Stairway to Heaven' is a herbaceous perennial reaching heights of 12-18 inches

Jacob's Ladder

Polemonium 'Stairway To Heaven'

Half · Zones 3–8

Jade Coleus (Coleus 'Jade') — Coleus 'Jade' is a striking ornamental plant featuring lush

Jade Coleus

Coleus 'Jade'

Half · Zones 10–11

Japanese Anemone (Anemone X Hybrida) — boasts graceful stems carrying poppy-like blooms

Japanese Anemone

Anemone X Hybrida

Full · Zones 4–8

Japanese Anemone (Anemone Japonica) — This perennial prefers partial shade and well-drained soil, spreading 18 to 24 inches wide

Japanese Anemone

Anemone Japonica

Full · Zones 5–8

Japanese Iris (Iris Ensata) — The Japanese Iris (Iris ensata) is a striking perennial with showy

Japanese Iris

Iris Ensata

Half · Zones 4–9

Japanese Silver Grass (Miscanthus Sinensis) — known as Japanese Silver Grass or Eulalia

Japanese Silver Grass

Miscanthus Sinensis

Full · Zones 5–9

Japanese Tree Peony (Paeonia Suffruticosa) — The Japanese Tree Peony (Paeonia suffruticosa) is a deciduous shrub

Japanese Tree Peony

Paeonia Suffruticosa

Half · Zones 4–9

Jerusalem Sage (Phlomis Samia) — is a robust perennial known for its felted

Jerusalem Sage

Phlomis Samia

Full · Zones 8–10

Jethro Tull Tickseed (Coreopsis 'Jethro Tull') — Coreopsis 'Jethro Tull' is a vibrant perennial known for its bright

Jethro Tull Tickseed

Coreopsis 'Jethro Tull'

Full · Zones 4–9

Joan Senior Daylily (Hemerocallis 'Joan Senior') — Hemerocallis 'Joan Senior' is a stunning daylily featuring large, creamy-white blooms with a green throat

Joan Senior Daylily

Hemerocallis 'Joan Senior'

Full · Zones 3–10