Pontedaria cordata forms a striking clump of deep green leaves and bright cerulean blue flower stems. No wonder it has gained the Royal Horticultural Society’s Award of Garden Merit!
Top tip: Copes well in areas where water levels fluctuate naturally, with spring flooding and later summer emergence.
Propagation: Produces very little root and grows from a bulbous rhizome that produces shoots that can be cut off together with part of the rhizome and potted on.
Depth of water over the soil: 05-15cm
Planting: Plant into 5lt or 10lt planting crate using heavy garden loam or Westland Aquatic compost.