Lisianthus, botanical name Eustoma, produces broad, bell-shaped, satin-textured flowers in shades of blue, rose, pink, purple, and white. Flowers appear in summer on long stalks either singly or in clusters above oblong gray-green leaves.
Flowers appear singly or in clusters; they gradually open from slender, furled buds. Flowers appear gray-green foliage in summer and are long lasting. Plants will rebloom if if old blooms are cut off.
There are just three species in the Eustoma genus. All are tap-rooted biennials usually grown as annuals. Eustoma is native to the prairies and fields of the central United States.
Get to Know Lisianthus
- Plant type: Biennial usually grown as an annual
- Growing Zones and range: Zones 8 to 11
- Hardiness: Tender
- Height and width: 15 to 20 inches (38-50cm) tall; 12 inches (30cm) wide
- Foliage: Ovate to oblong-lance-shaped leaves are stalkless
- Flowers: Ivory, pink, and purple deeply cup-shaped blooms on long, sturdy stems
- Bloom time: Mid- to late summer
- Uses: Cut flower; cutting garden; some varieties have double blooms
- Garden companions: roses, snapdragons, delphiniums
- Common name: Lisianthus
- Botanical name: Eustoma grandiflorum (Lisianthus grandifolia)
- Family: Gentiananceae
- Origin: Prairies of North America
Where to Plant Lisianthus
- Plant lisianthus in full sun; in not summer regions plant lisianthus in partial shade.
- Plant lisianthus in average, well-drained soil.
When to Plant Lisianthus
- Set established plants in the garden in spring after all danger of frost is passed.
- Sow seed in autumn or late winter.
Planting and Spacing Lisianthus
- Space Lisianthus 12 inches (30cm) apart.
- Seeds are dust-like; sprinkle seeds on the surface of the soil and don’t cover them.
How to Water and Feed Lisianthus
- Lisianthus requires ample moisture.
- Fertilize lisianthus every 4 weeks or add a 9-month, slow-release fertilizer at planting time.
- Mulch around lisianthus to conserve soil moisture.
- Pinch out tops at planting time to encourage bushier growth and more flowers.
- Remove spent flowers to encourage more flowers.
- Lisianthus is usually pest-free.
Lisianthus Pests and Diseases
- Lisianthus is often affected by virus diseases, gray mold, stem cankers, and Fusarium wilt.
- Sow seed in warm soil in autumn or late winter; seeds are dust-like and do not need soil cover; transplant them at the four-leaf stage.
- Seedlings are initially slow-growing.
Lisianthus Varieties to Grow
- Eustoma, grandiflorum, lisianthus: clumps of gray-green foliage send up 18 inch stems topped with tulip-shaped, 2 to 3-inch flowers in purplish-blue, pink, or white; plants bloom all summer; dwarf cultivars grow 6 inches tall; grow tall cultivars for cutting; cultivar ‘Flamenco’ is drought tolerant.