Nymphaea ‘Albert Greenberg’: A Brilliant Tropical Water Lily
Nymphaea ‘Albert Greenberg’ is a tropical day-blooming water lily celebrated for its glowing rosy-yellow flowers, lush mottled foliage, and delightful fragrance. This showy aquatic perennial has earned its place in ponds and water gardens worldwide because of its reliable blooming habit and strong growth. Hybridized by Dr. Kirk Strawn and introduced by Birdsey in 1969, ‘Albert Greenberg’ continues to charm gardeners who want a vibrant centerpiece for their aquatic landscapes. Belonging to the family Nymphaeaceae, this variety represents the tropical side of the water lily world and offers both beauty and vigor.
The Charm of Nymphaea ‘Albert Greenberg’ Flowers
The blossoms of Nymphaea ‘Albert Greenberg’ are a breathtaking blend of pink, orange, and yellow, creating a glowing rose-yellow finish. Each flower has a cup-like shape and measures up to 15–17 cm (6–7 in.) across. Rows of petals surround a bold cluster of golden stamens, making the bloom appear luminous in sunlight. Unlike hardy lilies that close earlier in the day, this tropical cultivar opens mid-morning and remains open until late afternoon, extending the hours of display.
The fragrance adds another layer of appeal. Gardeners who plant ‘Albert Greenberg’ near sitting areas or walkways enjoy its pleasant, sweet scent. Blooming begins in summer and often continues into early autumn, even tolerating light frost in mild climates. Because it flowers so freely, it creates a dynamic, ever-changing focal point in the pond.
Distinctive Foliage for Lasting Interest
Beyond its striking flowers, the foliage of Nymphaea ‘Albert Greenberg’ deserves attention. The leaves are large, nearly round, and reach up to 45 cm (18 in.) across. Their green surface is dramatically mottled with maroon and purple blotches. The wavy edges and intricate markings give the plant visual depth even when it is not in bloom. Floating leaves cover the water surface, shading it, and creating habitat for fish and beneficial insects. This foliage not only looks striking but also helps reduce algae growth by limiting direct sunlight into the pond.
Growth Habit and Environmental Tolerance
‘Albert Greenberg’ is a medium to large water lily, spreading between 1.5 and 2.4 m (5–8 ft.) across. It grows up to 10 cm (4 in.) tall above the water, with leaves floating across the surface. The plant performs best when grown in water 30–75 cm (12–30 in.) deep. While it thrives in full sun, it also tolerates partial shade, especially in regions where daytime temperatures exceed 35°C (100°F). Protection from strong winds is beneficial, as calm water encourages steady blooming.
As a tropical water lily, it is hardy only in USDA Zones 9–11. In colder climates, gardeners treat it as an annual or lift the tubers for overwintering indoors.
How to Grow Nymphaea ‘Albert Greenberg’
Growing Nymphaea ‘Albert Greenberg’ successfully requires attention to light, soil, water depth, and fertilization.
Light Requirements for Nymphaea ‘Albert Greenberg’
This tropical water lily requires at least 6 hours of direct sunlight each day to produce abundant blooms. In extremely hot regions, provide partial afternoon shade to prevent stress. Plant it away from waterfalls or fountains, as splashing water can hinder flower opening.
Soil and Planting
Plant ‘Albert Greenberg’ in heavy clay soil or specialized aquatic compost. Avoid lightweight mixes that float or cloud the water. Place the tuber in a large container, at least 8 liters (2 gallons) in size, and position the crown slightly above the soil surface. A thin layer of gravel or sand helps keep the soil in place while allowing shoots to emerge.
Begin by setting the pot in shallow water, 15–30 cm (6–12 in.) deep, to allow warmth and quick establishment. As growth advances, lower the container to the recommended depth of 30–75 cm (12–30 in.).
Watering Needs
Being an aquatic plant, ‘Albert Greenberg’ thrives in still or slow-moving water. Keep the pond water undisturbed to encourage blooming. Ensure water remains clean and well-balanced, with adequate oxygen levels if fish share the pond.
Fertilizing Nymphaea ‘Albert Greenberg’
Water lilies are heavy feeders. Insert aquatic fertilizer tablets into the soil near the crown every 2–3 weeks during the growing season. Start with higher nitrogen content to stimulate early growth, then switch to a formula with higher phosphorus and potassium for flowering. Even in fish ponds, supplemental feeding improves flowering consistency.
Pruning and Maintenance
Deadhead spent blooms by removing the stems as close to the crown as possible. Regularly remove yellow or decayed leaves to prevent rot and maintain water clarity. Overgrown clumps may need dividing every four to five years. Division should be done in late spring or early summer when the plant is actively growing. Each division must have a crown and healthy roots before replanting.
Winter Care
In warm climates within USDA Zones 9–11, Nymphaea ‘Albert Greenberg’ can remain in the pond year-round. However, in colder zones, tubers must be lifted before frost arrives. Trim foliage and store tubers in damp sand or peat moss at 10–12°C (50–55°F). Alternatively, overwinter tubers in aquariums kept at cool, stable temperatures. Replant outdoors when water temperatures reach at least 21°C (70°F) in spring.
Propagation of Nymphaea ‘Albert Greenberg’
Propagation of tropical water lilies like ‘Albert Greenberg’ occurs mainly through division. Healthy rhizomes are cut into sections, each with a growing point. These divisions are replanted in containers with fresh aquatic soil. Because ‘Albert Greenberg’ is non-viviparous, it does not produce new plants from its leaves like some tropical varieties.
Pests and Diseases
While relatively resilient, Nymphaea ‘Albert Greenberg’ can encounter pests and diseases in pond environments. Watch for water-lily beetles, water lily aphids, and the larvae of the brown china-mark moth, which chew leaves. False leaf-mining midges also create tunnels in the foliage. Remove infested leaves and control pests with safe aquatic treatments.
Fungal issues like crown rot, brown spot, and leaf spot may occur if water becomes stagnant or organic debris accumulates. Prompt removal of decayed plant matter and good water circulation help prevent problems.
Garden Uses
This water lily makes a stunning centerpiece for ponds, water gardens, and ornamental pools. Its long flowering season, mottled foliage, and tropical charm bring life to both formal and naturalistic aquatic landscapes. Because it spreads generously, it suits medium to large ponds where it can cover open water without crowding. Its shade benefits fish by keeping water cooler and reducing algae growth.
Gardeners seeking fragrance, color, and easy maintenance will appreciate how reliably this variety performs once established. Its tropical flair pairs well with other aquatic plants such as papyrus, lotus, and marginal irises.
Tips for Success with Nymphaea ‘Albert Greenberg’
Plant ‘Albert Greenberg’ in a sunny, sheltered pond with rich aquatic soil. Feed regularly, deadhead diligently, and remove decayed leaves. In warm zones, enjoy it as a perennial centerpiece. In cold zones, lift and store tubers before frost to ensure its return the following year. With the right care, this tropical water lily will deliver months of glowing blossoms and add unmatched elegance to your pond.
