ROYAL PICKEREL RUSH grows large blue bottle brush flowers that attracts butterflies and bees. This marginal pond plant comes back each year. Grows in moist soil or potted in heavy soil with water depth up to 10" inches deep. Pickerel Rush grows 24"-32" inches tall and spreads 12"-26" inches wide. Leaves are a shiny green and heart shaped. This is a very unique blooming pond plant. Hardy Zone 5-11. Plant Size: Medium to Large. Part to Full Sun. Pic by Andrew Davis.