lobelia

Lobelia speciosa 'Russian Princess' plants need to be watered often to keep the soil evenly moist. In the warmer months, water the plants once weekly, allowing the top inch of soil to dry out in between waterings. In cooler months, water only when needed, and allow the soil to slightly dry out before watering again. In order to avoid overwatering,do not saturate the soil. If the soil is very dry, give the plants a deep soak to encourage the roots to grow deeply into the soil.

Lobelia speciosa 'Russian Princess' grows best in full sun to partial shade, with 6 to 8 hours of sun a day. It is drought-tolerant and benefits significantly from daily watering. It must receive enough sunlight for optimal growth, flowering, and coloration. For best results, provide the plant with sun during the morning hours but provide some shade from the hot afternoon rays.

Lobelia needs to be pruned once a year. To help promote bushier growth, you should snip off any dead flowers and foliage as they appear throughout the season. Pruning back the entire plant in late winter or early spring is recommended, cutting the stems back to 1-third of their original size. This encourages stronger and more vigorous new growth. Avoid pruning any more than 1-third of the stems at a time, however, as this can weaken the plant.