White water rose (Nymphaea alba)

Also known as: White pond-lily

The white water lily (Nymphaea alba) is a perennial aquatic plant that flourishes in freshwater environments such as ponds and lakes. It produces striking white flowers adorned with many tiny stamens. Historically, monks and nuns would crush the plant's root and mix it with wine, using it as an aphrodisiac for centuries.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of White water rose

Lifespan

Perennial

Plant Type

Herb

Plant Height

50 cm to 2 m

Spread

1 m

Leaf Color

Green

Flower Size

10 cm to 20 cm

Flower Color

White

Images of White water rose

Quickly Identify White water rose

Nymphaea alba can be identified by its large, round floating leaves that are green on top and purplish-red underneath. The flowers are typically white with numerous yellow stamens in the center. The leaves are usually around 15-30 cm in diameter and the flowers about 10-20 cm across.

Scientific Classification of White water rose

Phylum

Vascular plants

Class

Dicotyledons

Order

Water-lilies, fanworts, and allies

Family

Water-lily

Genus

Water lilies

Species

White water rose

Planting and Growing of White water rose

Care Difficulty

Moderate

Watering Schedule

Every 30 days

Sunlight Requirements

Full sun

Sunshine Duration

4-8 hours

Ideal Temperature

68-77℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water White water rose?

For Nymphaea alba, it's essential to maintain a consistent level of water that just covers the base of the plant. The aim is to simulate its natural pond environment, ensuring that the soil or planting medium remains saturated. This means keeping around 500 milliliters of water at the base daily, depending on the container size or pond it is in.

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What Are the Sunlight Requirements for White water rose?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Nymphaea alba thrives in full sun to partial sun, ensuring ample blooming and robust foliage, crucial for a stunning and healthy water garden display.

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What Is the Ideal Temperature Range for White water rose?

Ideal Temperature: 68 ~ 77℉

Nymphaea alba thrives best in temperatures ranging from 68°F to 77°F. This range is optimal because it supports active growth and flowering, imitating the conditions found in its natural habitat. Keeping the plant within this thermal window helps maintain healthy metabolism and overall plant vitality.

What Soil is Best for White water rose?

Soil type: Loam, Peat soil

Soil PH: 6.5 ~ 7.5

Nymphaea alba thrives in soils that can retain moisture effectively. A wet environment supports its growth by ensuring the roots are consistently hydrated, which is crucial for a plant that naturally grows in aquatic settings. This plant benefits from soil rich in organic matter. A nutrient-rich medium supports the lush growth of its leaves and flowers, crucial for a thriving display in garden ponds. While water lilies prefer to be submerged, the soil should allow excess water to drain, preventing potential root rot. A balance in drainage is essential for the plant's health and stability. More About Soil→

How to Fertilize White water rose?

Fertilizer type: Balanced

For Nymphaea alba, the fertilization amount should be measured carefully as these aquatic plants require a balanced nutrient supply without excessive feeding. Typically, use one aquatic plant tablet for every 1-2 gallons of soil or maintain a balance of nutrients by adjusting liquid fertilizers based on the water volume and plant density. Always follow the manufacturer’s recommendations to prevent nutrient imbalances that harm the plant.

How to Prune White water rose?

Pruning Time: Spring, Summer

Begin by carefully inspecting the water surface and beneath for any yellowed, browned, or decayed leaves. Gently lift these out of the water for closer examination to confirm if they need pruning. Cut yellow or brown leaves close to the base, ensuring you remain above the water level with your cuts. Removing these prevents decay and algae growth that can disturb the aquatic environment. If leaves begin crowding, reducing sunlight for others, judiciously trim back to allow for balance and space. This ensures light penetration and oxygen exchange continues unobstructed. More About Pruning Techniques→

How to Propagate White water rose plant?

Propagate Time: Spring, Early summer

Fill seed trays with aquatic soil, ensuring consistent moisture levels. Maintain temperatures around 20-25°C to stimulate Nymphaea alba seed germination effectively.

Scatter seeds over the damp soil surface and gently press them in. Do not cover them too deeply; they require light exposure to germinate. Keep them in a warm, well-lit area.

Use a sharp knife to divide mature rhizomes of Nymphaea alba in spring. Ensure each division has at least one growth bud and roots. Replant them in their original aquatic environment immediately.

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How to Repot White water rose plant?

Repotting frequency: Every couple of years

Repotting Nymphaea alba is crucial when roots outgrow their container, or the growth seems stunted despite good care. Spring and summer are ideal as the plant is actively growing. Observe for overcrowded roots or reduced blooming, which signifies the need for a larger pot.

Select a wide, shallow pot that allows the water lily to spread its roots comfortably. The width supports sprawling growth which is essential for healthy leaves and blooms. Opt for a container with no drainage holes to retain water and mimic its natural habitat.

A rich clay loam is perfect for repotting Nymphaea alba. This mix holds nutrients well while providing the dense support aquatic plants need. The clay content also keeps the plant anchored while it grows and blooms beautifully in submerged conditions.

Toxicity of White water rose

Is White water rose toxic to humans?

The white water rose exhibits a moderate level of toxicity to humans, primarily through its ingestion. Every part of the plant contains the alkaloids nupharine and nymphaeine, which are the source of its toxic characteristics. Upon ingestion, these compounds can trigger a variety of symptoms including gastrointestinal issues like nausea and vomiting, as well as neurological symptoms such as dizziness and headaches. In extreme cases, the symptoms may escalate to include tremors or changes in mental status. Given that these toxic alkaloids are present in all parts of the white water rose, accidental consumption of any portion could result in these negative health effects. It is crucial for individuals to understand the potential dangers linked to this plant to avert instances of unintentional poisoning.

Is White water rose toxic to cat?

The white water rose poses a moderate level of toxicity to cats. A cat might accidentally consume this plant, which could lead to poisoning from all parts, including the roots, stems, leaves, and flowers. The harmful substances involved include alkaloids such as nupharine and nymphaeine. Post-ingestion, cats may show symptoms of physical distress or illness that could worsen if not addressed promptly. Therefore, it is crucial for cat owners to keep a close eye on their pets and, should they suspect that their cat has ingested white water rose, to seek immediate veterinary assistance to reduce potential health threats.

Is White water rose toxic to dog?

The plant species known as white water rose is categorized as having a moderate level of toxicity for dogs. If a dog ingests any part of this plant, it can lead to poisoning, as the entire plant is considered toxic. In the event of accidental ingestion, a dog may display a variety of symptoms that point to poisoning. These may include vomiting, diarrhea, lethargy, abdominal discomfort, and potentially more serious signs that vary based on the quantity consumed. The toxic compounds responsible for these adverse reactions are the alkaloids nupharine and nymphaeine. If you suspect that your dog has eaten white water rose, it is crucial to seek prompt veterinary assistance to maximize the chances of a favorable outcome for your pet.

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.

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