Lobelia tupa ( Vedrariensis Lobelia )
This a splashy and steady-going edging plant that may be categorized as an annual or perennial . thickset and trailing growth habit with leafy , branch theme covered in 2 - lipped , purple flowers ( three quarter of an column inch across ) , from summertime to Robert Lee Frost . Trailing miscellany are splendid in large planters or smaller potentiometer . Will endure through the winter in mild areas ....