Shrubby plant with the most delightful spikes of deep purple flowers in late Summer. Happy to grow in permanently damp soil to a covering of 10cms depth of water.
Top tip: When planting, make sure the soil covers all roots and any new shoots. Lightly prune all leafy shoots back in May to promote a bushier plant.
Propagation: Softwood cuttings taken in May-June
Depth of water over the soil: 0-10cm
Planting: Plant into 5lt planting crate using heavy garden loam or Westland Aquatic Soil