Ruellia is a large genus of flowering plants in the family Acanthaceae. It includes several hundred species distributed from tropical to temperate regions of the world. Depending on the species, Ruellia can be a large shrub up to 10 feet tall, or a small shrub 2-5 feet tall. They have a wide variety of flower colors, including pink, white or off-white, blue, lavender, purple and red or crimson.
Ruellia plants prefer full sun, but they can tolerate partial shade. They are fairly drought tolerant, but will perform better with regular water. They prefer well-drained soil and are hardy in USDA Zones 9-11.
When growing Ruellia indoors or in cold regions, it is best to keep it in a large pot with plenty of drainage. Place the pot in a sunny spot, and water regularly. If the temperature is too cold, you may need to move the pot indoors. Ruellia plants are not frost-tolerant and can be damaged by temperatures below freezing.
Overall, Ruellia is a beautiful and low-maintenance plant that is sure to add color and charm to your garden. It is a great choice for attracting butterflies and hummingbirds, and is sure to provide plenty of enjoyment for many years to come.