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Physostegia purpurea is rather little known in the aquarium hobby. The Eastern False Dragonhead is a swamp plant from the southeastern USA that is able to grow above and under water. It forms an about 10 cm high rosette of elongate stalked leaves under aquarium conditions. In its terrestrial form, it develops up to 1 m tall flowering shoots with opposite leaves and pretty intensely red-violet flowers.
This plant is not very demanding, however CO2 addition and a nutrient-rich substrate are recommendable. It tolerates cold water far below 20 °C; higher temperatures above 25 °C are unfavourable. The growth is rather slow. Adventitious plantlets appear on detached leaves as well as on flowering shoots.
The Eastern False Dragonhead fits well into the foreground to midground with its low rosette-like growth. It is an appropriate plant for North America-themed aquariums and is also interesting as emersed plant for paludariums and Wabi-Kusa.