Mexican petunia, or Ruellia brittoniana, is easy to grow under most conditions. These plants will produce blooms in almost any type of soil, and are resistant to drought and wet conditions as well. Mexican petunias are perennial shrubs, which can grow as tall as 3 feet. There are also some dwarf species available, which will grow only to less than 1 foot. With minimal care and supervision, these plants produce attractive, tubular flowers. The flowers are generally bluish or purple in color, and similar in appearance to common petunias. However, the two plants are not related. In cold climates, Mexican petunias can be grown as annuals, which must be replanted every year. These plants are very attractive to butterflies, which makes them popular choices in many backyards.
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