Neptunus is a surprising aquatic plant that comes from the bottom of the North Sea and which does not need water or any fertilizer.
Its luxuriant green foliage is very decorative and has been a sort of degeneration that is manifested by the appearance of secretions generating an odor that repels mosquitoes (but the smell is not perceptible to humans or domestic animals).
The Neptune plant tolerates a little sun but not too direct. No need to water. A plant is effective for an area of 40 m2 during six years.