Great blue lobelia 'Alba'

Lobelia siphilitica 'Alba' produces elegant pure white flowers from July through September on upright flower spikes rising above fresh green foliage. This hardy perennial thrives in moist to damp soils and is perfectly suited to pond edges, streamsides, and naturalistic borders. Its open flowers attract bumblebees, bees, and other pollinators while adding bright accents to the late summer garden.

Care/Water

Lobelia siphilitica 'Alba' requires regular watering during the growing season, especially in dry periods. The soil should be moist, well-drained, and nutrient-rich to promote strong white flowers and healthy foliage. Water at the base and avoid wetting foliage to prevent fungal diseases. Consistent moisture supports plant vitality and lush flowering.

Maintenance

Regularly remove faded flowers to encourage new blooms. Pruning after flowering keeps the plant compact and healthy. Organic fertilizer strengthens flower production and foliage. Check the plant regularly for pests.

Location

This Lobelia prefers sunny to partially shaded locations with moist, well-drained soil. Avoid waterlogging to prevent root damage. Open, airy locations promote strong flowers and healthy plants.

Tip

Light mulching around the base helps retain moisture and reduce weeds. This supports a healthy plant with attractive white flowers and extends the flowering period.

Lobelia siphilitica 'Alba' features light green foliage and white flower spikes, charmingly accenting beds and borders. The foliage supports the flowers and ensures healthy plants.