I can't find it on any toxic plant list. The 16 Most Common Poisonous Plants for Dogs #1 Sago Palm. Photo by Gretchen Heber. Mexican-petunia is a perennial in zones 8 to 11 that stands up to 3 feet in height. Sep 7, 2008 #2 E. egyptiandan New Member. From Seed. Answer: Neither Ruellia brittonianna (Mexican petunia) nor any other species of Ruellia appear in any of the following toxic plant databases: Poisonous Plants of … Thanks! These ornamental palms are popular in warmer climates and every part of it is toxic to dogs. Mexican petunias are a pretty flowering evergreen perennial that can be grown in containers, as shrub-like plants, or as ground cover. They grow rapidly and spread easily, even in conditions that would be less than ideal for many plants. Mexican petunia is an attractive blue- to purple-flowered perennial that is available at some garden centers. 10 Year Member! It might not, however, be winter-hardy in north Georgia. A: Mexican petunia, Ruellia simplex, should grow perfectly well outdoors in the Atlanta area. #2 Tomato Plant. Sow R. simplex seeds in early spring, after all danger of frost has passed. The tempting beauty of wisteria is alluring but do you know that it is a mildly poisonous plant, mainly for cats and dogs. Petunias have been used as garnish, but as members of the nightshade family, they are not to be eaten. 5 Year Member. Every part of it is poisonous, especially seeds. Hereof, are Mexican petunias edible? In truth, Mexican petunia removal requires vigilant attention to the garden or lawn where they’re a problem and may become a long-term project. The accepted botanical name is Ruellia brittoniana, but you'll also see it called R. malacosperma and R. tweediana. Because the seeds of the Mexican petunia can germinate for years after the adults are gone, it’s a battle you’ve got to really commit to. Leaf margins are can be smooth or wavy. Mexican petunia is not a real petunia, but its flower looks like one. Stems are green or purple and leaves are dark green, oppositely arranged and lance-shaped, roughly 6 to 12 inches long and ½ to ¾ inches wide. Mexican petunia spreads naturally by both seeds – it can spew the small brown discs as far as ten feet – and rhizomes. Gardeners have traditionally used Mexican petunia to add height to perennial borders, since it can grow up to three feet tall. Mexican Petunia. Likewise, what plants are toxic to dogs? Mexican Petunias If anyone knows whether Russian Tortoises or Leopard Tortoises can eat them safely please let me know. Danny . 12. As its name implies, Mexican petunia comes from south of the border. (No, I'm not talking about that tacky tourist park on the NC/SC line where Pedro sells sombreros the size of beach umbrellas.) Joined Aug 31, 2007 Messages 5,794 Location (City and/or State) USA. 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