Lobelia (Lobelia erinus)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Annual

Lobelia
Lobelia erinus

 
Features
A useful annual for the rock garden, containers, hanging baskets or as an edging in the border. 
 
Culture
Sun to shade in moist well-drained soil 
 
Cultivars

'Compact Royal Jewels' 10-14 inches tall, blue flowers

'Crystal Palace' 3-6 inches tall, blue flowers, low mound

'Regatta Series' 3-6 inches tall, blue flowers. good heat tolerance

'Laguna Series' 6-12 inches tall, blue and pink flowers. Good heat tolerance

'White Star' 6-12 inches tall, white flowers, good heat tolerance

'Techno Heat Light Blue' 6-12 inches tall, blue with white flowers, loose open habit, good heat tolerance

 
 
Mature Height
6-12 Inches
 
Size
Small
 
 
Annual Hardiness Type
Hardy Annual
 
 
Bloom Color
Bi-color
Blue
Purple
White
 
 
Bloom Season
June - October
 
Soil Conditions
Moist, Well-Drained
 
 
Exposure/Light Requirements
Full Sun
Partial Sun/Shade
 
 
Pests and Problems

Environmental Damage


Additional pests and problems that may affect this plant:

None serious
 
Additional Notes
Lobelia often does better in the cooler weather and often goes out of bloom when it gets hot. Look for heat tolerant cultivars. Shear back after first bloom, fertilize and water to maintain flowering in the summer.

 

 
Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic