Cryptanthus ‘Absolute Zero’ (H.)
 
Common Names Absolute Zero Earth Star, Silver-Banded Cryptanthus
 
Zones 10A–12
 
A compact terrestrial bromeliad native to Brazil and hybridized for dramatic contrast, Cryptanthus ‘Absolute Zero’ features dark brown to nearly black leaves with sharp silver banding radiating from the center. Its low, star-shaped rosette makes it ideal for terrariums, dish gardens, and shaded tropical beds. Though its white flowers are inconspicuous, the foliage alone earns it a place in any collector’s display2.
 
Key Features
Growth Habit: Flat rosette; terrestrial; slow clumper
Size: 10–14 in (25–36 cm) across; 4–6 in (10–15 cm) tall
Leaves: Leathery, dark brown to black with silvery transverse bands; slightly spiky texture
Flowers: Small, white; bloom from center; not showy
Fruit: Inconspicuous; not ornamental
Ecology: Leaf bases retain moisture; supports microfauna in terrarium settings
 
Growing Conditions
Light: Bright indirect light; avoid direct sun to prevent leaf scorch
Watering: Keep soil evenly moist but never soggy; allow top inch to dry between waterings
Soil: Well-draining mix with perlite and orchid bark; prefers slightly acidic pH
Temperature: 60–80°F (15–27°C); protect from cold drafts and frost
Humidity: High humidity preferred; ideal for terrariums or humidity trays
Propagation: By offsets (“pups”) once they reach ⅓ the size of the parent plant
Tolerance: Low drought tolerance; sensitive to overwatering and low humidity
 
Landscape Use Best suited for terrariums, dish gardens, and shaded tropical beds. Pairs well with Neoregelia ‘Fireball’, Peperomia caperata, and Fittonia albivenis.