Frost-resistant aquatic plants: the list for a pond that comes back to life on its own every spring
Every spring, we are asked the same question: “Did my plants die this winter?” Almost always, the answer is no. Most aquatic plants in our regions disappear from the surface in autumn so they can regrow as soon as the water warms up. The real losses mainly concern tropical species sold in summer, and hardy plants whose roots froze in a basket that was not immersed deeply enough.
— The short answer
Hardy water lilies, marsh irises, marsh marigolds, flowering rushes, arrowheads, water plantains, water mint, marsh forget-me-nots, water clover, sedges, rushes, hornwort, watermilfoil, and water violet spend the winter outdoors without any problem in temperate Europe. Water hyacinth and water lettuce, on the other hand, are tropical and die at the first frost. The golden rule: the rootstock must remain below the freezing zone. Move baskets from shallow shelves down before winter if your pond freezes deeply.
How aquatic plants survive winter
Water is a remarkable insulator. Even when the air drops to -15 °C, the bottom of a sufficiently deep pond remains above zero, at around 4 °C, because water reaches its maximum density at this temperature and accumulates at the bottom. Aquatic plants have developed several strategies to take advantage of this:
- Retreat into the rootstock: water lilies, irises, flowering rushes, and marsh marigolds lose their foliage, but their reserve-filled rhizome waits for spring.
- Winter buds: some plants form turions, small dense buds that sink to the bottom. This is the case with frogbit and hornwort.
- Diving: water soldier (Stratiotes aloides) sinks to the bottom in autumn and rises again in spring.
- Persistence: some oxygenating plants remain green under the ice and continue to produce a little oxygen when light gets through.
The list, zone by zone
| Zone | Hardy plants | Note |
|---|---|---|
| Wet bank | Purple loosestrife, meadowsweet, yellow loosestrife, sedges | No protection needed |
| Marsh (0-10 cm) | Marsh marigold, forget-me-not, water mint, rushes | In the ground: no problem. In a basket: beware of the root ball freezing |
| Shallow water (10-30 cm) | Yellow flag iris, flowering rush, arrowhead, water plantain, water clover | Very hardy |
| Deep water (40-120 cm) | Hardy water lilies, yellow water lily, water hawthorn | Rootstock under the ice = no risk |
| Submerged | Coontail, Eurasian watermilfoil, featherfoil | Regrow from the bottom or from buds |
| Floating | Water soldier, false aloe | Overwinter at the bottom |
Ready-to-plant Pink Water Lily Kit - Aquifleur
Hardy water lily with basket, potting soil and gravel, for flowering year after year. Direct pricing and immediate add-to-cart:
Plants that do not survive the winter
Water hyacinth and water lettuce are tropical plants: they die at the first frost. Water hyacinth (Eichhornia crassipes) is also listed as a species of concern among invasive alien species in the European Union, and its sale is prohibited there. Some tropical water lilies and lotus also require precautions: overwintering in a frost-free place, or a very deep pond for lotus in cold regions.
The trap of a basket on a shallow shelf
A hardy plant in the ground can survive a harsh winter; the same plant in a basket placed on a shelf 10 cm below the surface may have its entire root ball freeze. In a basket, the roots no longer have the protection of the surrounding mass of soil. If your pond freezes several centimeters deep, move the baskets of the most fragile plants down one shelf in autumn, and move them back up in spring when the shoots appear.
Square planting basket 40 x 40 x 28 cm
A large slotted basket provides a larger root ball, better protected from frost. Direct pricing and immediate add-to-cart:
Autumn tasks
- Cut off the faded water lily leaves below the water and remove them.
- Cut back bank plants once they are dry, leaving a few hollow stems (reeds, rushes) that provide shelter for insects.
- Thin out overly dense oxygenating plants without pulling everything out.
- Stop adding fertilizer: the plants are entering dormancy.
- Bring tropical plants indoors or treat them as annuals.
Ceratophyllum demersum - Coontail
Perfectly hardy native oxygenating plant that comes back every spring. Direct pricing and immediate add-to-cart:
Why choose native plants
The species that grow spontaneously in our ponds and ditches have survived thousands of European winters: there is no doubt about their hardiness. They also support local wildlife, from pollinators to dragonfly larvae, and pose no risk of escaping into the wild and becoming invasive, as some exotic pond plants have. A pond composed mostly of native plants, dotted with a few cultivated water lilies, is both the most resilient to frost and the richest in life. In spring, it is also the one that starts growing again fastest.
Read also
To successfully grow the pond's signature plant: How to grow a water lily in a pond or lake?.
READ THE ARTICLEDiscover our selection of aquatic plants and hardy water lilies, chosen for our winters.
Frequently asked questions
— My water lilies have disappeared in winter; are they dead?
Most likely not. The leaves die back in autumn, but the rootstock regrows in spring, sometimes late if the water remains cool.
— Should plants be removed from the pond in winter?
Not hardy plants. Only tropical plants need to be brought indoors or replaced.
— Does ice damage plants?
Only if it reaches the rootstock. This is why, in cold regions, it is important to lower baskets from shallow shelves.
— When do the plants start growing again?
As soon as the water warms up, generally between March and May depending on the species and region.
In summary
- The vast majority of European aquatic plants are hardy.
- They retreat into their rootstock or form winter buds.
- Water hyacinth and water lettuce do not survive the winter.
- The rootstock must remain below the frozen zone: beware of shallowly submerged baskets.
Sources and references
- Regulation (EU) No 1143/2014 on invasive alien species and the list of species of concern to the Union
- Wetzel R.G., Limnology: Lake and River Ecosystems, 3rd edition, Academic Press, 2001
- Aquiflor / Foudebassin growing experience, Nodebais (Belgium)
Last updated: September 28, 2026.
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