Can you grow a water lily in a container? Yes. A water lily grows well in a tub, half barrel or small preformed pond if it gets at least six hours of sun, calm water, heavy garden soil in a submerged pot, and slow-release aquatic fertilizer tablets. Dwarf hardy varieties are the easiest choice for small containers and beginners.
Key takeaway: Use heavy loam or clay soil, never light potting mix, set the crown at the right depth, and keep the water still. MU Extension calls a whiskey half barrel with a dwarf lily an ideal way for beginners to start.
| Need | Target |
|---|---|
| Sun | At least 6 hours a day (MU Extension); more is better |
| Soil | Heavy garden loam or clay; no perlite, peat or vermiculite |
| Crown depth | Dwarf types no more than 5 in (13 cm) below the surface |
| Water | Still, with no fountain splash |
| Feeding | Aquatic fertilizer tablets per label |
What Kind of Water Lily Grows Best in a Container?
A dwarf or small hardy water lily grows best in a container. Hardy types grow from rhizomes, bloom by day, and can stay outdoors in water that does not freeze solid. Tropical types grow from tubers, often bloom at night and are showier, but MU Extension notes they must come indoors each fall where winters freeze.
N.C. State Extension lists small hardy cultivars that suit tubs, including ‘Helvola’, ‘Pygmaea Helvola’, ‘Joanne Pring’, ‘Perry’s Baby Red’, ‘Froebeli’ and ‘Chromatella’. Larger Nymphaea cultivars can spread several feet, so match the plant to the surface area you have.
| Type | Grows from | Blooms | Winter |
|---|---|---|---|
| Hardy | Rhizome | Daytime | Can stay in water that won’t freeze solid |
| Tropical | Tuber | Day or night | Lift and store moist indoors |
What Container Do You Need for a Water Lily?
You need a watertight container that is wide rather than tall, such as a half barrel, stock tank, tub or preformed pond liner. Wide surface area gives leaves room to spread in the sun. Inside it, the plant goes into its own shorter pot, which you lower into the water.
- Outer container: watertight, at least as wide as the mature leaf spread you expect.
- Planting pot: wide and shallow, with soil kept in by fabric or a solid base.
- Top layer: pea gravel over the soil to hold it in place.
- Bricks or blocks: to raise the pot to the right depth.
Our guide to barrels and stock tanks explains which plastics are food safe and easy to clean.
Where Should You Put the Container?
Put the container in the sunniest level spot you have, away from trees that drop leaves and needles into the water. Rotting leaves add nutrients that feed algae and use up oxygen. A spot near a hose makes topping up easy, and a sturdy base matters because a filled half barrel is very heavy.
- Check sun hours across a full day before you fill it.
- Leave room around the tub for reaching in to trim leaves.
- Keep it away from downspouts that carry roof debris.
How Do You Plant a Water Lily Step by Step?
To plant a water lily, fill a wide pot with moist heavy soil, set the rhizome at an angle with the growing tip exposed, press a fertilizer tablet in away from the crown, top with gravel, and lower the pot slowly into the water. Raise it on blocks so the crown sits at the right depth.
- Fill the pot about two-thirds with heavy garden soil.
- Set the rhizome at an angle with the crown uncovered.
- Add a tablet near the pot edge, away from the roots.
- Cover the soil with pea gravel, leaving the crown clear.
- Soak the pot so air escapes before lowering it.
- Lower it onto bricks so the crown sits at the right depth.
- Lower the pot further as leaves reach the surface.
MU Extension advises setting the crown about 10–12 in (25–30 cm) below the surface for standard lilies, and no more than 5 in (13 cm) deep for dwarf varieties.
How Much Sun and Fertilizer Does a Water Lily Need?
A water lily needs at least six hours of direct sun each day to bloom well, and MU Extension says more sun is better. Lilies are heavy feeders, so press slow-release aquatic plant tablets into the pot following the label. Skip regular garden fertilizer, which can leak into the water and feed algae.
For algae control ideas that also apply to tubs, see our guide to algae in reservoirs.
How Do You Keep a Container Pond Healthy?
Keep a container pond healthy by topping up evaporated water with dechlorinated or rain water, removing yellow leaves and spent flowers, and keeping fountains away from the lily. MU Extension notes turbulent water reduces performance, so place any pump outlet at the far side or leave it out.
Still water can breed mosquitoes. Floating plants, a small fish or a mosquito dunk labeled for the use can help; our guide to mosquito larvae covers safe options. Floating cover such as duckweed can also shade the water, but it spreads fast.
How Do You Overwinter and Divide Nymphaea?
Hardy Nymphaea can stay outdoors in water that does not freeze solid; MU Extension suggests water at least 24 in (61 cm) deep for that. Small tubs freeze faster, so move the pot to an unheated garage in a bucket of water if yours freezes through. Tropical lilies need to be lifted and stored moist indoors. Divide hardy rhizomes in spring when plants crowd, bloom poorly or push leaves above the water.
MU Extension says crowding usually takes four to five years in a pond. In a small tub you may need to divide sooner.
What Problems Affect a Water Lily?
Few serious problems affect a water lily, but N.C. State Extension lists crown rot, aphids, beetles, midges and leaf spot. Turtles and koi may eat leaves, and dogs can tear plants when they jump in. Most issues are handled by removing damaged leaves and keeping the plant in full sun.
| Problem | Likely cause | Fix |
|---|---|---|
| No flowers | Too little sun or food | Move to sun; add tablets |
| Leaves standing above water | Crowded rhizome | Divide in spring |
| Soil floating out | Light potting mix | Repot in heavy soil |
| Aphids on pads | Insects on leaves | Hose them into the water for fish or remove leaves |
FAQ About Growing a Water Lily
Can a water lily grow indoors?
Rarely well. Most need six or more hours of direct sun.
Do lilies need a pump?
No. They prefer still water.
Can I use potting soil?
No. MU Extension warns light mixes float out of the pot.
Are water lilies and lotus the same?
No. Lotus leaves and flowers usually rise above the water, while lily pads float.
How deep should a tub be?
Deep enough for the pot plus the crown depth your cultivar needs.
Browse our list of plants that grow in water for more ideas.
Sources
- University of Missouri Extension — Waterlily: Easier to Grow Than You Might Think
- N.C. State Extension Plant Toolbox — Nymphaea (Hardy Water Lilies)
- University of Illinois Extension — Water Garden Plants
- Kansas State University Research and Extension — Water Gardening: Biological Balance (MF2911)
- Photo credits (Wikimedia Commons, edited with titles): Daubeny’s water lily at BBG (50824) by Rhododendrites (CC BY-SA 4.0); Pond-edge plants at Achamore Garden – geograph.org.uk – 5446824 by M J Richardson (CC BY-SA 2.0); RIBogorSeerose by Ziegler175 (CC BY-SA 4.0); Mosquito nursery by LittleLeafSheep (CC BY 4.0)