Overview
Nymphaea thermarum is a submerged, floating aquatic in the genus Nymphaea, part of the Nymphaeaceae family, with deciduous foliage. Nymphaea thermarum grows best in full sun, and tolerates clay and loam soils and any pH. Its UK hardiness is rated H5. Suggested uses include patio and container plants.
About
Nymphaea thermarum is a cultivar of the aquatic genus Nymphaea, which comprises rhizomatous perennials with rounded, floating leaves and distinctive cup- or bowl-shaped flowers. This deciduous plant thrives in full sun and is suitable for south- or west-facing aspects, tolerating both exposed and sheltered conditions. It prefers poorly-drained soils such as clay or loam with a range of pH levels from acid to alkaline. Hardy to UK zone H5, it is well-suited for patio and container planting, requiring aquatic compost and propagation by division of rhizomes or offsets during summer.
Growing conditions
Best soil and position for Nymphaea
- Sunlight
- Full sun
- Soil type
- Clay, Loam
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Poorly-drained
- Aspect
- South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H5
Plant details
Nymphaea thermarum size, habit and characteristics
- Plant type
- Aquatic
- Habit
- Submerged, Floating
- Foliage
- Deciduous
- Suggested uses
- Patio and container plants
Care notes
Pruning and caring for Nymphaea thermarum
- Propagation
- Propagate by division of rhizomes or offsets in summer, place pots in shallow water until established
- Pest resistance
- Susceptible to water-lily beetle, water lily aphid, brown china-mark moth and false leaf-mining midge
- Disease resistance
- May be susceptible to crown rot, brown spot and water lily leaf spot
Frequently asked questions
Where is the best place to plant Nymphaea thermarum?
Nymphaea thermarum prefers full sun. It suits exposed and sheltered positions.
What soil does Nymphaea thermarum need?
Nymphaea thermarum grows best in clay and loam soil. It is happy in soil of any pH. Aim for soil that stays poorly-drained.
Is Nymphaea thermarum hardy in the UK?
Nymphaea thermarum has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Nymphaea thermarum?
Propagate by division of rhizomes or offsets in summer, place pots in shallow water until established.
More in the Nymphaea genus
- Nymphaeawaterlily
- Nymphaea caerulea (T/D)blue lotus
- Nymphaea 'Caroliniana' (H)
- Nymphaea 'Esmeralda' (H)
- Nymphaea 'Gold Medal' (H)
- Nymphaea 'Laydekeri Rosea' Laydeker (H)waterlily 'Laydekeri Rosea'
- Nymphaea 'Red Beauty' (T/D)
- Nymphaea 'White Sultan' (H)