The Invasive Species Council wants the common sweet pea plant, Polygala myrtifolia, with its pretty purple flowers recognised as a significant weed and removed from sale.

It may not always bloom profusely, but sweet pea shrub, Polygala fruticosa, blooms sporadically through most of the year. Even when not much color is evident from a distance, a few flowers can likely ...

After writing about plants with purple flowers, two gardeners shared their purple horticultural passions. For Greg Fitze, who gardens in Long Beach, it’s false heather. “This plant is extremely low ...