Photo by Melody

PlantFiles: Palespike Lobelia, Spiked Lobelia
Lobelia spicata

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Lobelia (low-BEE-lee-a) (Info)
Species: spicata (spi-KAH-tuh) (Info)

Synonym:Lobelia spicata var. spicata
Synonym:Lobelia bracteata

One vendor has this plant for sale.

2 members have or want this plant for trade.


12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

15-18 in. (38-45 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:
Light Blue
White/Near White

Bloom Time:
Mid Summer
Late Summer/Early Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
By dividing the rootball
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

Click thumbnail
to view:

By gldandrews
Thumbnail #1 of Lobelia spicata by gldandrews

By creekwalker
Thumbnail #2 of Lobelia spicata by creekwalker

By DaylilySLP
Thumbnail #3 of Lobelia spicata by DaylilySLP


1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive gldandrews On Sep 14, 2005, gldandrews from Andrews, NC (Zone 6a) wrote:

This plant grows freely along road sides in at the edges of wooded areas here in NC. It self seeds freely and come back stronger every year.

Neutral JodyC On Jan 17, 2005, JodyC from Palmyra, IL (Zone 5b) wrote:

The flowers attract long-tongued bees primarily, including Little Carpenter bees, Miner bees, Mason bees, and Leaf-Cutting bees. Small butterflies and skippers also visit the flowers occasionally, which are probably less effective at pollination. All of these insects seek nectar. The leaves and stems contain a watery white latex that is toxic, therefore most mammalian herbivores are less likely to eat this plant than others. However, deer appear to be somewhat immune to the effects of the toxins in lobelias. The seeds are too small to be of any interest to birds.

With its smaller pale flowers, Pale-Spiked Lobelia is less showy than some of its better known relatives, such as Lobelia cardinalis (Cardinal Flower) and Lobelia siphilitica (Great Blue Lobelia), but has better resistance to dry conditions once it becomes established. The flowers of these species all share a similar structure, but vary in their size and color.


This plant has been said to grow in the following regions:

Cedar Falls, Iowa
Bay City, Michigan
Erie, Michigan
Cole Camp, Missouri
Andrews, North Carolina
Asheville, North Carolina
Milford, Pennsylvania
Leesburg, Virginia

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