1. 
   Nymphaea ‘Pygmaea Helvola’ (syn. ‘Helvola’)
   
   The ultimate true miniature hardy — the benchmark all others are measured against. Star-shaped yellow blooms just 2–3 inches across with heavily mottled pads and a 1–2 foot spread. Vigorous bloomer all summer. Tolerates some shade. Ideal at 6–12 inches depth.
   



2. 
   Nymphaea ‘Joanne Pring’
   
   Miniature pink hardy that flowers very freely. Ranked among the very smallest hardy water lilies alongside Helvola and Tetragona. Bronze-purple mottled leaves mature to solid green. Reported as a stronger bloomer than ‘Perry’s Baby Red’ in heat.
   



3. 
   Nymphaea ‘Perry’s Baby Red’ (Perry Slocum, 1983)
   
   Rich rosy-red cup-shaped blooms, mildly fragrant and very free-flowering. Pads emerge reddish and mature to medium green. Suited to containers and small water gardens. May bloom less in peak summer heat in hot climates.
   



4. 
   Nymphaea tetragona (Pygmy White — true species)
   
   Cup-shaped white blooms up to 2 inches with 7–15 scalloped petals and golden stamens. Slightly fragrant, afternoon-blooming. Grows only 16–18 inches wide — one of the very smallest hardies. Best at 6–12 inches depth.
   



5. 
   Nymphaea ‘Hermine’ (Latour-Marliac, 1910)
   
   Tulip-shaped white blooms with long pointed petals and sunny yellow stamens. Smaller flowers than most modern hybrids. Good for ponds of 8–20 gallons with some shade tolerance. Over 115 years of proven performance.
   



6. 
   Nymphaea ‘Ellisiana’
   
   Free-flowering single red blooms with pointed petals and a light fragrance. Best in full sun. Consistently listed among the most reliable small-spread red hardies. Excellent in a half-barrel where a true red is desired.
   



7. 
   Nymphaea ‘Froebeli’ (Otto Froebel, 1898)
   
   Deep blood-red classic with a long track record. Tolerates cooler water and adapts to some shade better than most red hardies. Very forgiving in container culture and widely praised across the hobby for reliability.
   



8. 
   Nymphaea ‘Laydekeri Lilacea’ (Latour-Marliac, 1892)
   
   Fragrant rose-lilac blooms that deepen in color with each successive day. A true hardy despite its tropical appearance. One of the most compact pink hardies available and consistently noted for restrained spread.
   



9. 
   Nymphaea ‘Graziella’ (Latour-Marliac, 1904)
   
   A changeable-colored hardy with blooms that open soft orange-yellow and deepen to orange-red over successive days. Leaves speckled in maroon. A rare and beautiful color effect in a truly small, container-appropriate package.
   



10. 
    Nymphaea ‘Mini Mali’
    
    Pure-white double-petaled blooms of 2–4 inches over petite green pads. A newer introduction earning strong reviews as one of the best true miniature white hardies currently available. Perfect for patio bowls, whiskey barrels, and small lined containers.
    

Editor’s note: Nymphaea ‘Dauben’ is the single most consistently recommended tropical across nursery and hobbyist sources. Nymphaea ‘Pygmaea Helvola’ holds that same position among hardies. Both are the benchmark cultivars their categories are measured against.