Gardening
in Tucson, Phoenix,
Arizona and California

Gardening in Tucson, Phoenix, Arizona and California

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Lobelia laxiflora: Sierra Madre Lobelia / Red Mexican Lobelia

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Description
Form: Herb.
Lifespan: Perennial.
Leaf retention: Evergreen except dies to ground in freezing temperatures.
Growth rate: Moderate to rapid.
Mature Size: 1-2' high and 4-5' wide.
Flowers: Orange to red, tubular, yellow throats, 2" long.
Bloom: Late winter through spring.
Fruit: Seed pod.
Leaves: Dark green, long, narrow.
Stems: No thorns. Reddish on new growth. Floppy.
Roots: Spreads by rhizomes. Invasive in moist soil.
Wildlife: Attracts hummingbirds.
Toxic / Danger: All parts of plant are toxic.
Origin: Arizona, Mexico, Central and South America.

Cultivation and Uses
USDA hardiness zones: 9-11. Root-hardy to zone 8b.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Part shade to full sun.
Water once established: Once or twice a month.
Soil: Dry to moist, pH 6.1-7.5 (slightly acidic to neutral).
Prune: Cut dead stems and foliage to ground after first freeze.
Litter: Low.
Propagation: Seed or rootball division.
Uses: Ornamental, erosion control, hummingbird garden.

Comments
Other common names are Mexican Lobelia and Desert Lobelia. The scientific name means "loose-flowered lobelia" and may refer to the parts of this oddly shaped flower being inconsistently arranged. Blooms all year in frost-free areas.



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Lobelia laxiflora: Red Mexican Lobelia - flowers

Lobelia laxiflora: Red Mexican Lobelia