Grow Zone Recommendation: Blue lobelia is a versatile annual that grows well in USDA zones 2-11.
Sunlight Needs: Blue lobelia is pretty laid back when it comes to sunlight. It can be grown in sun, partial sun, or shade.
Watering Needs: Water frequently during hot and dry periods, especially plants that are in containers.
Average Size: Blue lobelia grows from under 6 inches tall, to 12 inches tall. They will also grow up to 12 inches wide.
Foliage Color: In spring and fall, blue lobelia boasts delicate flowers of white, blue or pink. The foliage is a deep emerald green.
Must Know Plant Care Tips: Blue lobelia will bloom its best in cooler temperatures, like fall and spring. In the heat of summer, it will usually stop flowering. At this time, shear it back and it will likely bloom again in the fall when temperatures cool down. It will grow in a variety of soils, but prefers sandy, clay, or loam soil.
Plant Problem Solver: Blue lobelia looks beautiful in hanging baskets, near a natural water source, or as a ground cover. If you need something easy to plant, this is a great bet. To start them indoors, just spread the seeds on top of the soil and water them in well. Within a week or two, you’ll have seedlings. Blue lobelia is also wonderful for planting on slopes or to control erosion. Once established, it’s a low-maintenance plant. Keep the soil moist as it is not drought tolerant.
Pretty Pairings: Blue lobelia is a wonderful feature for an english garden. It will look lovely planted near phlox, delphiniums, hollyhocks, daisies, foxglove, lavender, and lady’s mantle.