lobelia

Lobelia (Lobelia speciosa 'Compliment Deep Pink') should be watered moderately every 1-2 weeks, making sure the soil doesn't dry out but preventing it from becoming waterlogged. Water early in the day, allowing any excess to drain away and avoid getting the leaves wet. Water should be applied to the base of the plant to prevent the foliage from becoming damaged. During periods of extreme heat the plant should be watered more frequently, about every other day.

Lobelia speciosa 'Compliment Deep Pink' flourishes under partial sun, meaning a plant should receive 6-8 hours of direct sunlight each day. A spot that has morning sun and late afternoon shade is ideal, as intense, all-day sun may cause the plant to become stressed. Filtered light is also beneficial, and in generally more advantageous than full sunlight. However, 'Compliment Deep Pink' will not survive in full shade environments, and may need supplemental lighting to thrive during winter months.

It’s best to prune Lobelia speciosa 'Compliment Deep Pink' after bloom, usually in early August or late July. Since it’s a half-hardy annual, don’t prune too heavily to ensure the plant doesn't become vulnerable to a late frost. Pruning should focus on deadheading spent flower clusters and thinning out the overall number of stems, being careful not to cut back too far into the healthy stem tips. Additionally, shearing the plants back about half their height once the flowering season has completed will promote new shoots and help ensure continued blooming until frost.