Planting a lotus in a pond: varieties, planting and overwintering in Belgium

Many water gardeners buy a lotus on a whim, plant it at the bottom of the pond like a water lily... and never see it again. The lotus (Nelumbo) can nevertheless be grown in Belgium, and its midsummer flowering remains one of the most striking sights in a water garden. The key is to understand that the lotus is a heat-loving plant: it wants shallow water that warms up quickly, full sun, a wide container, and a rhizome handled with great care. This guide covers the entire cycle, from purchasing the rhizome to overwintering, including the mistakes we see most often at the counter.

Lotus or water lily: two very different plants

They are often confused because both have large round leaves and spectacular flowers. Botanically, they are not even closely related: lotus belongs to the Nelumbonaceae family, while water lily belongs to the Nymphaeaceae family. And in a pond, their needs differ considerably.

In practice, the water lily is the “easy” pond plant, while the lotus requires attention. But a lotus well established in a container that warms in the sun is often more floriferous than one might imagine at our latitudes, especially during hot summers.

Hardy and dwarf varieties

There are hundreds of cultivars of Nelumbo nucifera, the Asian lotus, and a few derived from the American lotus (Nelumbo lutea, with yellow flowers) or from crosses between the two. For a Belgian garden, size is the first consideration.

In our climate, dwarf and medium-sized varieties are generally the safest: their volume of water and soil warms up faster in spring, which brings the growing season forward. Cultivars with double pink flowers, such as 'Momo Botan', are reputed to flower well in conditions that are less warm than those in their country of origin. American lotus and its hybrids are often cited as being somewhat more cold-tolerant. In all cases, buy a well-formed rhizome from a supplier who specifies the size category: this will guide the choice of container and depth.

Choosing the container and substrate

Wide rather than deep. The lotus rhizome grows horizontally and produces new shoots along the sides. A wide, shallow container (20 to 30 cm of soil is enough) is better than a narrow, tall pot. Round containers are preferable to square ones: in a corner, the growing tip hits the side and may break or fold back.

Solid or openwork? For a lotus placed in a pond, a sturdy planting basket lined with fabric (jute or felt) prevents the soil from washing into the water. For a lotus grown alone on a terrace, a watertight container without holes serves as a mini-pond and warms up even faster. In a koi pond, the basket must be weighted and protected: the fish rummage through the soil and nibble on young leaves.

The substrate. Heavy, clay-rich soil, low in fresh organic matter. Do not use universal potting soil: it floats, decomposes, clouds the water and encourages algae. Specialised aquatic potting soil, optionally mixed with sifted clay garden soil, works well. Then cover it with a 2 to 3 cm layer of washed gravel, leaving a clear area around the rhizome tip.

Rhizome planting

This is the stage at which most failures occur. The lotus rhizome resembles a string of elongated segments ending in a tapered growing tip. If this tip breaks, the segment often will not grow again.

1. Wait for the right period. In Belgium, planting is generally done between late April and early June, when the water in the container or pond remains consistently above 15 to 18 °C. If planted too early in cold water, the rhizome remains dormant and may rot.
2. Prepare the container in advance. Fill it with moist substrate, tamp it down lightly, then add water to create a thick mud.
3. Lay the rhizome flat, with the tip slightly raised, a few centimetres from the wall and directed toward the centre or along the wall.
4. Bury only the back of the rhizome 2 to 5 cm deep, or hold it in place with one or two flat stones placed on the segments, never on the tip. The tip remains exposed, above the substrate.
5. Add the water very gently, with a hose placed on a plate, to achieve 5 to 10 cm above the soil.
6. Place the container in the sun and do not touch the rhizome again. The first floating leaves generally appear within a few weeks if the water is warm.

Never cut a lotus rhizome to “divide” it when planting, and never bury it completely in the soil. A segment buried too deeply, without contact with warm water, is the main reason a lotus fails to start growing.

Depth and exposure

Lotus prefers shallow water because it warms up fastest. The typical progression:

As for exposure, it is simple: full sun, at least six hours a day, and ideally more. A lotus in partial shade will produce leaves, but rarely flowers. Sheltered from the wind is even better: the large upright leaves tear easily. On a south-facing terrace, a dark container placed on a heat-absorbing surface often produces better results than the main pond.

Fertilization

The lotus is hungry during its growing period, but improperly used fertilizer mainly feeds algae. A few rules:

• No fertilizer at planting: wait until several upright leaves have emerged, indicating that the root system is functioning.
• Fertilizer tablets or sticks pushed into the substrate, away from the rhizome and the growing tip, at the dose indicated by the manufacturer. Avoid soluble fertilizers poured into the water of a pond containing fish.
• About every three to four weeks during the growing season, then stop around mid-August to let the plant prepare for dormancy.
• Yellow or small leaves in midsummer on a well-exposed plant: this is often a lack of nutrients. Scorched leaf edges after an application: overfertilization.

Overwintering

In Belgium, this is what determines whether the lotus survives from one year to the next. The rhizome tolerates cold and water close to 0 °C, but it must never freeze. In autumn, the leaves turn yellow and lie down: this is normal, as the plant enters dormancy. Cut them above the water level when they are brown, without cutting below the water the hollow stems that are still green, as this could let water into the rhizome.

The safest solution for a lotus in a container is still to move it somewhere frost-free: an unheated garage, cellar, or shelter where the temperature remains cool but above zero. Leave the substrate waterlogged, check from time to time that it does not dry out, and bring the container back outside once the frosts are over.

Common problems

Common case: a lotus purchased as a rhizome at the beginning of spring and planted immediately at the bottom of an 80 cm deep pond. The water at this depth remains cold until June, so the rhizome does not start growing and rots. The same plant, placed in a 50 cm diameter container with 10 cm of water on a sunny terrace, would have produced its first leaves within a few weeks. Lotus tolerates many things, but not cold, deep water.

If you are hesitating between a lotus and a water lily for your first pond, start with the water lily: our guide How to grow a water lily in a pond or lake? explains how to grow it, and our tips for getting as many water lily flowers as possible also partly apply to lotus, particularly fertilization. For growing in a container, the article about openwork baskets is a useful complement to this guide.

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Frequently asked questions

— Is the lotus hardy in Belgium?

The rhizome tolerates cold but not frost. It spends the winter at the bottom of a deep pond below the ice zone, or brought indoors in a frost-free garage or cellar, with the substrate kept moist at all times.

— When should you plant a lotus rhizome?

Generally from late April to early June, when the water remains consistently above 15 to 18 °C. If planted in cold water, it may rot.

— How deep should the water be for a lotus?

5 to 10 cm above the substrate when planting, then 15 to 30 cm for dwarf varieties and up to 30 to 40 cm for medium-sized varieties.

— Why does my lotus produce leaves but no flowers?

Usually due to a lack of sunlight or warmth, or because the plant is young or lacking nutrients. Full sun, shallow water and fertilizer tablets significantly improve flowering.

In summary

• The lotus is a warm-weather plant: shallow water, full sun, shelter from the wind.
• Wide, round container, heavy clay soil, no universal potting soil.
• Place the rhizome flat, with the tip above the substrate, and plant when the water exceeds 15 to 18 °C.
• Apply fertilizer tablets once the leaves have emerged, stopping around mid-August.
• In winter, keep the rhizome frost-free: at the bottom of the pond or brought indoors in a cool place, with moist substrate.

Last updated: October 3, 2026.