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Lobelia x speciosa ‘Grape Knee-Hi’ (photo courtesy of Terra Nova Nurseries, Inc.)
Lobelia x speciosa ‘Grape Knee-Hi’ (photo courtesy of Terra Nova Nurseries, Inc.)

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Zone
Zones 2-9, 14-17
Full SunPartial Sun
Full, Partial
Ample Water
Ample
Toxicity
Leaves of most contain poisonous alkaloids

Lobelia x speciosa


Perennials, Flowers

LOBELIA

All are grown for their tubular, lipped flowers, which resemble those of honeysuckle (Lonicera) or Salvia. Annual kinds are low plants for edgings or hanging baskets; perennial sorts are larger, vertical-growing plants with flowering stalks that rise above the foliage.

Lobelia x speciosa

Perennial. Group of hybrids of uncertain ancestry. Can reach 5 ft. tall and 1 ft. wide; many combine red leaves and red flowers. Compliment series, to 2 1/2 ft. high, has dark green leaves; blossoms may be scarlet, deep red, or blue-purple. Fan series grows to 2 ft. high and 16 in. wide; comes in blue, burgundy, red, rose, salmon, and scarlet. ‘Grape Knee-Hi’, 2 ft. high, is a sturdy plant with rich purple blooms. Provide rich soil, ample water, full sun or partial shade.

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