Aphelandra squarrosa aka Zebraplant

Aphelandra squarrosa is an evergreen shrub from Brazil. It grows wild in the northeast and southeast regions. It belongs to the acanthus family, Acanthaceae. Gardeners call it zebra plant or saffron spike. Its pale leaf veins give it the zebra name. Outside warm climates, people grow it as a houseplant. It also suits a greenhouse or conservatory.

The plant grows slowly and has an upright, bushy shape. RHS lists a garden height of 3.3–4.9 feet [1–1.5 metres]. Its listed spread is also 3.3–4.9 feet [1–1.5 metres]. Other accounts describe heights reaching 6–6.6 feet [1.8–2 metres]. Plants often have two to four stout stems. The glossy, dark green leaves grow in opposite pairs. They have pointed tips and smooth or gently wavy edges. White, silver, or yellow veins stand out against the green. Leaves can reach about 1 foot [0.3 metres] long.

Yellow flower spikes rise from the ends of the stems. These can reach about 0.7 feet [0.2 metres] long. Small, tube-shaped yellow flowers emerge among bright yellow bracts. The bracts may also show touches of maroon. RHS reports scattered flowering through the year. Chicago Botanic Garden lists blooms from March through June. Both the leaves and flowers give this plant display value. It works as a single specimen or container accent.

Give it bright, indirect light and warm, humid air. Use a rich potting mix that drains well. RHS suggests peat-free houseplant compost with added perlite. Keep the soil moist, but avoid standing water. Do not let the root ball dry out fully. Reduce watering during its winter rest, without stopping it. Feed every two weeks in summer and monthly in winter. USDA zones 11–12 suit it; RHS rates it H1B. Its indoor care can be demanding. Prune after flowering to promote side shoots and limit legginess. Stem cuttings can replace plants that become short-lived or bare.

Dry air can cause brown leaf tips. Excess sun, cold, or dry soil can damage leaves. Too much water can cause drooping and leaf loss. Watch for aphids, scale, mealybugs, whiteflies, and spider mites. Crown rot and leaf spots may occur. ASPCA lists it as non-toxic to dogs, cats, and horses. That safety listing does not establish that it is edible.