# Water Lily (Nymphaea (tropical hybrids))

Canonical: https://plantguide.ae/plants/water-lily · Updated: 2026-10-05
Source: Ghaf Gardens (https://plantguide.ae/plants/water-lily)

Water Lily · زنبق الماء · also called Waterlily, Nymphaea  
aquatic · exotic · family Nymphaeaceae · grows 0.05–0.3 m tall, 0.6–1.5 m wide · moderate growth  
sun to part shade · high water need  
Ratings for Dubai (1–5, 5 is best): heat 4 · salt 1 · drought 1 · shade 2 · ease of care 3  
Sow or plant: Mar–May, Sep–Oct  
Uses: specimen, container  
Garden styles: tropical, luxury

The classic floating pad and flower for a still pond; choose tropical types for Dubai, and plan honestly for evaporation, algae, mosquitoes and hot summer water.

## About

Meet the water lily, the plant that turns a pond into a room. Round pads lie on the surface like a scatter of plates, and from among them the flowers rise just above the water, open to the sun, each one doubled in the reflection below. It is the plant that makes a patch of still water look intentional.

Technically it is simple: roots in the mud, leaves and flowers on long stalks, everything floating. What it asks for is stillness, which is why it does not belong beside a fountain or in a rill. Give it calm, sun and warm water and it flowers for most of the year. In Dubai the tropical types add a second trick: night-bloomers open at dusk, scented, and stay open into the morning, so the pond is at its best when the garden is.

The mood is calm and reflective, a reason to sit beside the water at the end of the day. It also brings a practical benefit, since a surface half-covered with leaves shades the water and limits algae.

Nymphaea, the water lily, is the plant that makes a pond look like a pond. Its round leaves float on long, flexible stalks rooted in the pond floor, and its flowers open at or just above the surface, so the plant is built for still, sunlit and reasonably deep water and is damaged by turbulence. The RHS advises planting away from fountains, pumps and cascades, and matching the cultivar to the depth: dwarf types for 30 to 45 cm, medium types for 45 to 75 cm and large types for 75 to 120 cm.

For Dubai the key distinction is hardy versus tropical. Hardy lilies, bred for cold climates, flower best in water of about 20 to 25 °C, and the dark red and pink forms can scorch or stop flowering in hot water. Tropical lilies, which the RHS says need water above 21 °C, cope with Dubai's warm water far better, and they come in two kinds: day-bloomers that open from mid-morning to late afternoon, and night-bloomers that open at dusk and stay open until mid-morning, which suits a garden you actually use in the evening. In Dubai, tropical cultivars are the sensible choice.

A water-lily pond in Dubai is a small ecosystem that needs managing. Floating leaves are the best natural defence against algae because they shade the water, though the RHS advises covering no more than about half the surface. Evaporation is relentless: Fanack puts the UAE's average at about 8 mm a day, so the pond needs a float-valve top-up. Still water is also a mosquito risk, and Dubai Municipality's own toolkit of larvae-eating fish and bacterial larvicide is the model to follow. The care notes below cover the detail; for a taller, heat-loving partner see [Lotus](https://plantguide.ae/plants/lotus.md).

## Through the year

A Dubai water lily's year runs from March to November. Tropical cultivars are planted from March to May, once the water is reliably above 21 °C, and flower from April through to late autumn, with a second planting window in September and October. From June to September, in water that can reach the mid-30s °C in a shallow, sunny pond, depth, afternoon shade and daily top-ups matter more than anything else, and algae and mosquitoes peak. From December to February the water cools, growth slows and flowers are fewer; leave the plants in place and just remove dead leaves. In March the pond warms and the cycle starts again.

| When | What | Note |
| --- | --- | --- |
| Mar–May, Sep–Oct | Plant: Plant once the water is reliably above 21 °C | Tropical lilies need warm water; the RHS gives 21 °C as the minimum. |
| Apr–Nov | Flowers: Flowers from spring to late autumn |  |
| Apr–Sep | Feed: Aquatic fertiliser tablets in the basket | Sparingly and only in the basket; fertiliser that leaks into the water feeds algae. |
| Jun–Sep | Heat stress: Hot water: leaves scorch, algae and mosquitoes peak | Shade, depth and daily top-ups are the defence. |
| May–Sep | Pest watch: Aphids, beetles and mosquito larvae |  |
| Dec–Feb | Dormant: Growth slows in cool water | Fewer flowers when the water cools below about 20 °C; leave plants in place. |

## Care in Dubai

- **Watering in summer:** The real watering job is the pond itself: expect to lose water every day (the UAE's average evaporation is about 8 mm a day, and more in peak heat). Fit a float-valve auto-fill, top up little and often, and avoid sudden large changes in water temperature.
- **Watering in winter:** Evaporation falls, so top up about weekly. Water may cool below 20 °C, slowing growth and flowering; leave the plants in place and remove dead leaves.
- **While establishing:** Plant in a mesh basket and lower it gradually, starting with the crown about 15–20 cm below the surface and lowering as leaves reach the top, until it sits at the depth the cultivar needs.
- **Soil:** Heavy loam or peat-free aquatic compost in a mesh basket, topped with 2–3 cm of lime-free pea gravel to hold it in place; never garden soil with fertiliser, which feeds algae.
- **Feeding:** Slow-release aquatic fertiliser tablets pushed into the compost, following the label. Do not scatter fertiliser into the water.
- **Pruning:** Remove yellowing leaves and spent flowers promptly, since rotting leaves feed algae, and thin plants if leaves cover more than about half the surface.
- **Planting:** Plant tropical cultivars in March–May or September–October, once the water is above 21 °C, in an aquatic basket. Dwarf types suit 30–45 cm of water and medium types 45–75 cm. Choose a spot with at least six hours of sun and shade from the worst afternoon heat, away from fountain and pump outlets.
- **Pests and problems:** Aphids on leaves in warm weather; Water lily beetle and leaf-mining midges; Crown rot and leaf spot; Mosquito larvae in still water
- **Toxicity:** Not generally regarded as poisonous to people or pets, but it is an ornamental, not a food or herbal plant, and some Nymphaea species contain psychoactive alkaloids. Any open pond is also a drowning risk for toddlers: fit a rigid grille or keep the water to a safe depth.

## Good and bad

**Pros**
- Floating leaves shade the water, helping to limit algae and keep a small pond cooler
- Tropical types flower from spring to late autumn; night-bloomers suit evening gardens
- Scented, richly coloured flowers over a calm, reflective surface
- Dwarf cultivars grow in ponds only 30–45 cm deep
- Shade and cover for pond fish

**Cons**
- Hates moving water: not for rills, cascades or beside pump outlets
- Needs sun to flower but suffers if pond water reaches the mid-30s °C in peak summer
- Still water breeds mosquitoes unless fish, larvicide or gentle movement are used
- Summer evaporation means daily top-ups, ideally with an auto-fill
- Cool winter water slows growth and flowering

## Common mistakes

- Planting lilies beside a fountain, waterfall or pump outlet. The RHS advises calm, still water; turbulence stops flowering and tatters the leaves.
- Building the pond too shallow. A shallow, sunlit pond heats rapidly in a Dubai summer, while depth buffers the temperature and gives the plants a stable root zone.
- Covering the whole surface, or none of it. Too little cover invites algae and too much shades the water; the RHS advises about half.
- Topping up in large, infrequent amounts. Evaporation is constant in summer, so an auto-fill float valve avoids both low water and sudden temperature swings.
- Reaching for algaecides, or planting in garden soil. The RHS notes there are no chemical treatments approved for home gardeners in the UK; shade, plant cover, aquatic compost and low nutrients are more reliable.

## Good to know

- Hardy lilies flower best at about 20–25 °C, and dark red and pink forms can scorch or stop flowering in very hot water; tropical lilies tolerate water into the mid-30s °C.
- Day-blooming tropicals open from mid-morning to late afternoon; night-blooming tropicals open at dusk and stay open until mid-morning.
- Fanack puts the UAE's average daily evaporation at about 8 mm, so a pond needs topping up every day or two in summer.
- Dubai Municipality's mosquito programme breeds up to 20,000 larvae-eating fish a year and uses biological larvicides, including bacterial tablets: the same toolkit works at garden-pond scale.
- Warm water holds less dissolved oxygen, which is the real risk to fish in a hot, still pond; keep part of the pond shaded and add gentle aeration away from the lilies.

## Using it in a garden

Roles: Pond centrepiece, Evening feature (night-blooming types), Shade and cover for pond fish, Algae control by surface shade

Use water lilies in a still pond or a quiet basin, never in a rill or cascade or beside a pump or fountain outlet, where moving water stops them flowering. Give the pond at least 45 cm of depth, 60 cm or more if you can, and six hours of sun with shade from a pergola or sail in the hottest part of the afternoon. Aim for leaves to cover about half the surface. Night-blooming cultivars suit a pond beside a seating area or dining terrace, where their evening scent and uplighting show them at their best.

- [Lotus](https://plantguide.ae/plants/lotus.md): Lotus leaves rise above the surface while lily pads lie on it, giving two layers of foliage in the same water; keep lotus in its own sealed container.
- [Papyrus](https://plantguide.ae/plants/papyrus.md): Papyrus gives a tall, fine-textured backdrop at the pond's edge, screening pumps and shading the water.
- [Umbrella Sedge](https://plantguide.ae/plants/umbrella-sedge.md): A smaller marginal plant that adds a fine-textured edge without overpowering the lily pads.
- [Elephant ear](https://plantguide.ae/plants/elephant-ear.md): Large, glossy leaves in the moist margin beside the pond echo the round lily pads and share a lush, tropical mood.

## FAQ

**Can water lilies survive a Dubai summer?**  
Tropical cultivars can, in a pond at least 45 cm deep with afternoon shade and daily top-ups. Hardy cultivars, especially dark red and pink ones, may scorch or stop flowering in the hottest months.

**Should I choose a day-blooming or night-blooming water lily?**  
Night-bloomers open at dusk and stay open until mid-morning, which suits a garden used in the evening. Day-bloomers are open from mid-morning to late afternoon, when you may be indoors.

**Will a pond breed mosquitoes?**  
Still water can. Dubai Municipality's approach is larvae-eating fish and bacterial larvicide tablets, and the same works in a garden pond: a few fish, a bacterial product when needed, and gentle movement away from the lilies. Never release fish into natural water.

**How do I stop my pond turning green?**  
Shade the water with plant cover over about half the surface, avoid garden soil and heavy feeding, and keep the pond partly shaded. The RHS notes that floating barley straw, about 50 g per square metre, can also help discourage algae.

**Can I put water lilies in a rill?**  
No. They need still water, and the RHS advises keeping them away from fountains, pumps and cascades. Put them in a still pond or basin, and use moving water elsewhere.

**How deep should the pond be?**  
The RHS suggests 30–45 cm for dwarf lilies, 45–75 cm for medium and 75–120 cm for large types. In Dubai, deeper water also buffers summer heat, so aim for at least 45 cm.

## Related plants

[Lotus](https://plantguide.ae/plants/lotus.md) · [Papyrus](https://plantguide.ae/plants/papyrus.md) · [Umbrella Sedge](https://plantguide.ae/plants/umbrella-sedge.md) · [Elephant ear](https://plantguide.ae/plants/elephant-ear.md)

## Photos

![A flower of the 'Peach Glow' cultivar of hardy water-lily (genus Nymphaea), photographed just after rain at the Brook...](https://upload.wikimedia.org/wikipedia/commons/d/d7/Peach_Glow_water-lily_at_Brooklyn_Botanic_Garden.jpg)  
Photo: Ragesoss / CC BY-SA 3.0 / Wikimedia Commons ([source](https://commons.wikimedia.org/wiki/File:Peach_Glow_water-lily_at_Brooklyn_Botanic_Garden.jpg))

![Nymphaea alba (nenúfar blanco europeo), junto al campo de concentración de Fort van Breendonk, en Flandes (Bélgica).](https://upload.wikimedia.org/wikipedia/commons/b/bd/Nymphaea_alba.001_-_Breendonk.jpg)  
Photo: Fernando Losada Rodríguez / CC BY-SA 4.0 / Wikimedia Commons ([source](https://commons.wikimedia.org/wiki/File:Nymphaea_alba.001_-_Breendonk.jpg))

## Sources

- [RHS: How to grow waterlilies](https://www.rhs.org.uk/plants/waterlilies/growing-guide)
- [RHS: Pond algae and blanket weed](https://www.rhs.org.uk/weeds/pond-algae-and-blanket-weed)
- [NC State Extension Gardener Plant Toolbox: Nymphaea, tropical day-blooming water lilies](https://plants.ces.ncsu.edu/plants/nymphaea-tropical-day-blooming-water-lilies/)
- [NC State Extension Gardener Plant Toolbox: Nymphaea, tropical night-blooming water lilies](https://plants.ces.ncsu.edu/plants/nymphaea-tropical-night-blooming-water-lilies/)
- [Fanack Water: UAE water report (evaporation)](https://water.fanack.com/uae/)
- [The National: Dubai's predatory fish and mosquito control](https://www.thenationalnews.com/news/uae/2026/04/02/biting-back-dubai-authorities-unleash-predatory-fish-to-curb-rise-in-mosquitos-after-heavy-rain/)
- [Oz Water Gardens: Hardy water lilies](https://www.ozwatergardens.com.au/waterlilies/hardy/)