Cryptanthus zonatus aka Earth Star

Cryptanthus zonatus is an evergreen perennial from northeastern Brazil. It belongs to the bromeliad family, which includes pineapple. Its native range has a wet tropical climate. Common names include earth star, pheasant plant, and zebra plant. This species grows in soil rather than on trees. Growers value its marked leaves as a houseplant. Its low form also suits containers and rock gardens.

The plant forms a flat, open rosette of stiff leaves. It can make clumps and stays wider than tall. NC State gives heights of 0.5–1 foot [0.15–0.30 metres]. RHS lists a lower height of 0.33 feet [0.10 metres]. Reported spreads reach 1.3–1.6 feet [0.40–0.50 metres]. RHS gives five to ten years to reach full size. The narrow, pointed leaves have no hairs. Their edges have small teeth and a wavy outline. Silver-grey or cream bands cross the green leaf blades. Pink or copper tones can add to the leaf colour. These lasting leaves give the plant its main visual appeal.

Small white flowers can appear in summer. They emerge from the centre, sometimes on a short stem. The star-shaped blooms measure less than one inch across. They form sparse clusters called corymbs. Flowers appear only now and then, unlike the lasting foliage. The species name refers to the bands on its leaves. The genus name refers to flowers hidden within the plant.

Give this plant bright light screened from direct sun. Strong sun can fade the colour of its leaves. It needs warmth, shelter from drafts, and humid air. Use an acidic potting mix that drains well. Both sandy and loamy mixes suit it. Organic matter is useful in the growing medium. Keep the mix moist, but avoid leaving roots waterlogged. Water moderately during growth and reduce watering in winter. RHS advises misting with lukewarm soft water and monthly dilute feed. Its UK hardiness rating is H1A, requiring warmth above 15°C. NC State lists USDA zones 10–12. Terrariums and bottle gardens suit its need for humidity.

The plant needs no pruning. Remove offsets in early summer to make new plants. Seeds can also grow with warmth at 27°C. Mealybugs and scale may occur, though pests are often absent. Root rot is a possible disease problem. ASPCA lists it as non-toxic to cats, dogs, and horses. That safety listing does not establish that it is edible.