Marginal pond plants are planted at pond edges, with submerged roots and emerging stems and foliage, otherwise known as emergent aquatic plants. These plants usually have their roots and crown underwater, so are perfect for shallow water or pond planting shelves. Pond perennials pair well with rocks, gravel, and taller pond plants. Floating plants positioned at your pond edge can be easily moved or divided into container ponds while deep-water marginals such as bulrush and reed plants create a scenic backdrop.
Nestled amongst wildlife meadows and resident ducks, Caroline’s award winning pond plant nursery in Enfield has been making a splash since 1965, when they invented the (recycled, obvs) aquatic basket. Sixty years and multiple RHS gold medals later, they’re still surprising us with new varieties every year!
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What are marginal pond plants?
Pondside (or marginal) plants are those that sit in that boggy limbo between pond and land. A liminal space where beauty flourishes at every turn. These plants thrive in wet conditions – either permanently moist soil at the edge of the pond, or more often, submerged in the shallows of the pond itself, or on a pond’s shelf. There are both spectacular flowering marginals as well as steadfast foliage plants ready to add structure, texture and contrast.
Our favourite marginal pond plants
It’s hard to look past irises when it comes to the conversation of marginals. Yellow flag irises (Iris pseudacorus), Louisiana irises (Iris louisiana) and Japanese water irises (Iris ensata) all thrive in shallow water, their distinctive fan-shaped flowers and blade-like foliage adding regal elegance wherever they’re found. For something with a bit more spread or bushiness, opt for the mat-forming bog pimpernel (Anagallis tenella) or the tufted water plantain (Alisma plantago-aquaticum).
Caring for marginal pond plants
Marginal pond plants are nice and easy to care for; for easier maintenance we’d recommend you plant your marginals in aquatic baskets. Plant in loamy soil, amended with some aquatic compost if necessary. Scatter a shallow top-dressing of pea gravel to keep soil within the basket and to reduce the risk of fish from agitating or accidentally uprooting the plant. Routinely trim any dead or diseased plant material, and divide your plants if they’re becoming overly vigorous. If growth seems poor, then consider adding a bit of slow-release aquatic fertiliser during spring.
