Jack in the Pulpit (Arisaema triphyllum). Hardy, herbaceous, spring-flowering North American perennial Description: Irregular shaped flower consists of a showy spathe (?"pulpit?"), which is green with deep purple or brownish stripes; and a club-like spadix (?"jack?") covere... - Jack in the Pulpit (Arisaema triphyllum).
Jan Bos Hyacinth (Hyacinthus orientalis cv.). Early to mid-spring-flowering, hardy, pest-resistant bulbDescription: Large, single-flowered, highly-scented flowers in pinkish-red with a white blushHabit: Flower height of 8 to 12 inchesCulture: Plant bulbs 5 to 6 inches dee... - Jan Bos Hyacinth (Hyacinthus orientalis cv.).
Japanese Anemone (Anemone hupehensis). Hardy, late summer to fall-blooming perennialDescription: Pale rose to mauve, 5-petaled, slightly cup-shaped flowers with distinctive yellow stamens rise on long, narrow, branching stems above basal growth of dark green ... - Japanese Anemone (Anemone hupehensis).
Juneberry (Amelanchier canadensis). Deciduous, early spring-flowering, North American treeDescription: Delicate white flowers appear as the leaves emerge, giving the plant a light, airy appearance; edible, maroon-purple fruit form in early summer; finely t... - Juneberry (Amelanchier canadensis).
Karl Rosenfield Peony (Paeonia lactiflora cv.). Herbaceous, spring flowering perennialDescription:Large, fully double, globe-shaped, crimson flowers, mid- to late-season Habit: Grows to 3 feet high and wide; medium height stems and medium green foliage Culture: Prefer... - Karl Rosenfield Peony (Paeonia lactiflora cv.).
Kentucky Coffeetree (Gymnocladus dioica). Large, deciduous North American treeDescription: Fine-textured, bluish-green leaves and grayish to dark brown bark with unique, deeply grooved bark pattern; female trees bear large, reddish brown, leathery seed pods&comm... - Kentucky Coffeetree (Gymnocladus dioica).
Lady Fern (Athyrium filix-femina). Hardy, North American perennialDescription: Delicate, fine-textured, light green frondsHabit: Grows 1-3 feet high and wide, clump forming, spreading by underground running rootsCulture: Prefers partial to full shade a... - Lady Fern (Athyrium filix-femina).
Lady Tulip (Tulipa clusiana). Hardy, mid-spring flowering bulb Description: Small, ivory white petals with a pink, central stripe, suggestive of peppermint sticks Habit: 6 to 12 inches high Culture: Plant bulbs 3 to 4 inches deep in a sunny, well-... - Lady Tulip (Tulipa clusiana).
Lady's Mantle (Alchemilla mollis). Hardy, early summer-flowering perennial Description: Bears many loose clusters of tiny, yellow green flowers; downy, gray-green foliage Habit: Sprawling, clump forming plant grow 1 to 2 feet high and up to 2 feet wide Culture:... - Lady's Mantle (Alchemilla mollis).
Large-leaved Magnolia (Magnolia macrophylla). Hardy, deciduous, North American tree Description: Fragrant, open cup-shaped creamy-white flowers in late spring, 12 inches or more across; bright green leaves 20 to 30 inches long and 9 to 10 inches wide; cone-like fruits mat... - Large-leaved Magnolia (Magnolia macrophylla).
Lenten Rose (Helleborus x hybridus). Hardy, late winter to spring-blooming perennialDescription: Saucer-shaped, nodding flowers in a mix of colors, possibilities on separate plants include shades of white, cream, pink, and purple; dark green, le... - Lenten Rose (Helleborus x hybridus).
Little Bluestem (Schizachyrium scoparium). Hardy, North American perennial grassDescription: Warm season, ornamental grass with slender green leaves that have a bluish tinge at the base; fall foliage ranges from bronze to flaming orange; fluffy plumes of ripening seed heads catch... - Little Bluestem (Schizachyrium scoparium).
Littleleaf Linden (Tilia cordata). Hardy, deciduous tree Description: Dark, shiny green leaves turn yellow in fall. Fragrant, yellowish flowers in mid-summer Habit: Grows 60 to 70 feet high and 30 to 40 feet wide; can be pruned into hedges Culture: Prefers moist&c... - Littleleaf Linden (Tilia cordata).