Garden Oracle / Drought and Heat Tolerant Gardening / Tucson - Phoenix - Arizona - California

Growing Lobelia laxiflora:
Mexican Lobelia

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Description
Form: A clumping herb.
Lifespan: Perennial.
Leaf retention: Evergreen in regions without freezes.
Growth rate: Rapid.
Mature Size: Typically 1-2' (30-60cm) high and 4-5' (1.2-1.5m) wide in cultivation, but can reach 10' (3m) tall.
Flowers: Orange to red, tubular, yellow throats, 2" (5cm) long.
Bloom: Late winter through spring. Each flower lasts one week.
Fruit: A small seed capsule.
Leaves: Dark green, long, narrow.
Stems: New growth is reddish, floppy.
Roots: This plant spreads by rhizomes and is invasive in moist soil.
Wildlife: The flowers attract hummingbirds. This plant is usually avoided by mammals.
Toxic / Danger: All parts of this plant are toxic.
Origin: Arizona, Mexico, Central and northwestern South America.

Cultivation and Uses
USDA hardiness zones: 9-11. This plant dies to the ground in hard freezes and regrows from its roots in the spring.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: It requires part shade above 85°F (29.4°C), especially afternoon shade. Below 80°F (27°C) it will thrive in full sun.
Soil: Dry to moist, moderate to high organic material, pH 6.1-7.5 (slightly acidic to neutral) .
Water once established: Once or twice a month.
Prune: Deadhead spent flowers to encourage repeat blooming. Cut dead stems and foliage to the ground after the first freeze.
Litter: Low.
Propagation: Seed or rootball division.
Uses: Ornamental, erosion control, hummingbird garden.

Comments
This plant is a member of the Bellflower family (Campanulaceae).



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Lobelia laxiflora: Red Mexican Lobelia - flowers

Lobelia laxiflora: Red Mexican Lobelia

Latest update: September, 2024
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