Identity & taxonomy
- Scientific name
- Haworthiopsis attenuata (Haw.) G.D.Rowley
- Family
- Asphodelaceae
- Genus
- Haworthiopsis
- Order
- Asparagales
- IUCN status
- Least Concern (LC)
- Wikidata
- Q1576680
- Haworthia attenuata Haw.
- Aloe attenuata Haw.
- Zebra haworthiaen
- Zebra planten
- Zebra cactusen
- Pearl planten
- Sebraplantasv
- Sebraplanteno
- Zebraplanteda
- Seeprahaworthiafi
- Zebra-Haworthiede
South Africa (Eastern Cape province) — endemic
How to identify it
Growth habit. Stemless rosette of stiff fleshy pointed leaves, slowly forming a clump as basal offsets (pups) emerge over years. Mature clumps reach 20–25 cm wide with 5–10 individual rosettes. Slow grower — full mature size takes 4–6 years from a small offset.
Leaves. Stiff fleshy lanceolate leaves 5–8 cm long, dark glossy green with raised white tubercles arranged in transverse bands on both inner and outer surfaces. Tip is sharply pointed but not painfully sharp. Cross-section is triangular with a flat upper face. Leaves are arranged in a tight spiral rosette.
Flowers. A slender 30–40 cm flower stalk emerges from the centre of the rosette in late spring or summer, carrying small tubular white-and-green flowers. Flowers are not ornamentally significant; many growers cut the stalk to redirect energy into vegetative growth.
- Raised white tubercle bands on BOTH inner and outer leaf surfaces — diagnostic vs H. fasciata.
- Sharply pointed leaf tips, not truncated — distinguishes from H. cooperi or H. cymbiformis.
- Slow grower forming small offsets at the base over years.
- Tolerates moderate indoor light better than most succulents.
- Non-toxic to cats and dogs (ASPCA) — rare among succulent-shaped indoor plants.
Commonly confused with
Zebra plant (true)
H. fasciata has white tubercle bands only on the OUTER leaf surface; the inner face is smooth and dark green. H. attenuata has bands on both surfaces. Most plants sold in supermarkets as 'H. fasciata' are actually H. attenuata — the true H. fasciata is rarer in cultivation.
File-leaved haworthia
Limifolia has continuous transverse ridges (not separate tubercles) and the leaves are flatter, not as triangular. The ridges feel like a metal file when stroked.
Lace aloe
Lace aloe has soft white teeth (cilia) along the leaf margins and white spots scattered randomly; haworthia tubercles form distinct horizontal bands and the leaf margins are smooth.
Care
Light
Bright indirect; tolerates moderate light.
Place 30–60 cm from an east, west, or moderately bright north window. Unlike most succulents, Haworthiopsis evolved as a rock-crevice plant in partial shade — it actually dislikes harsh midday sun, which bleaches the leaves to a pale red-orange. Lower light tolerance makes it one of the rare succulent-style plants that survives in apartments without bright south windows.
Seasonal: Nordic apartments above ~55°N: window light alone is fine year-round; supplemental grow lighting is rarely needed for this species.
Water
When the soil is fully dry — every 2–3 weeks in summer, monthly in winter.
Allow the soil to dry completely between waterings. Water thoroughly until runoff and empty the saucer. Overwatering is the leading cause of haworthia decline — the species is a small succulent with a small water-storage capacity and rots fast in soggy soil. The 'finger test' to 5 cm depth is the safest watering signal; do not water on a calendar.
Seasonal: Cut frequency by half from November to February; some growers stop watering entirely in cold winter rooms below 15 °C.
Soil
Free-draining cactus and succulent mix.
Standard cactus and succulent mix works well, or a custom mix of 2 parts peat-free potting soil to 1 part coarse sand or pumice and 1 part perlite. Drainage matters more than nutrient content. Pot must have drainage holes. Avoid water-retentive peat-heavy mixes designed for tropical foliage plants.
Humidity
30–50 %; not strict.
Tolerates the dry indoor humidity of heated Nordic apartments without issue. Higher humidity is fine but unnecessary. The species evolved on dry rocky South African slopes and does not appreciate stagnant humid air.
Temperature
16–26 °C.
Comfortable in normal heated room temperatures. Tolerates cool winter temperatures down to 5 °C if soil is kept dry — many succulent growers give haworthia a cool dry winter rest at 8–12 °C, which encourages flowering. Brief exposure below 5 °C produces leaf damage; sustained frost kills.
Fertilizer
Quarter-strength cactus feed once or twice per growing season.
A cactus-specific or balanced low-nitrogen liquid feed at quarter label rate, applied to moist soil, once in spring and once in midsummer. Haworthia is a very light feeder; over-fertilising produces leggy soft growth that is more rot-prone. Do not feed in winter.
Seasonal: No feeding from October through March.
Repotting
Every 3–4 years in spring, only when offsets fill the pot.
Slow grower — repot less often than most houseplants. Move up by one pot size (2–3 cm wider) in spring. A shallow wide pot suits the species better than a deep one. Brush away old soil and inspect roots for any black rotted sections; trim and let air-dry for 24 hours before repotting.
Offsets (pups)
easy~Immediate; recovery 2–4 weeksMature plants produce small offset rosettes at the base. When an offset reaches 2–3 cm, gently twist it off (or cut close to the rhizome with a clean blade), let the cut surface callus over for 24 hours, then plant in fresh succulent mix. Roots emerge within 2–3 weeks. The fastest, most reliable method.
Leaf cutting
moderate~8–12 weeksTwist off a healthy lower leaf with the white basal portion intact. Let callus 2–3 days, then lay flat or insert base-down in barely-damp succulent mix. New rosettes emerge from the leaf base over 2–3 months. Lower success rate than offsets (~50 %).
Seed
difficult~3–6 weeks germination; 3–4 years to display sizeFresh seed germinates well on damp succulent mix in bright indirect light. Glacially slow — 3+ years to a meaningful display size. Used by collectors and hybridisers; home growers stick with offsets.
Cultivars
var. clariperla
Form with much thicker, flatter, more pearl-like white tubercle bands. The variant most commonly sold as 'pearl plant'.
var. radula
More numerous and finer tubercles giving a more uniformly stippled white appearance, less distinct stripes.
'Concolor'
Plain-green form lacking the white markings — rare in cultivation, usually a curiosity.
Common problems
Leaves turning soft, mushy, and translucent
Symptom
Leaves lose their firmness, become soft to the touch, and develop translucent yellow-brown patches; rot may spread from the base upward.
Cause
Overwatering — the most common haworthia problem. The species rots fast in soggy soil.
Fix
Stop watering immediately. Unpot, brush away wet soil, inspect roots — if any are black or mushy, trim back to healthy white tissue with a clean blade. Let the rootball air-dry for 24–48 hours, then repot in dry succulent mix and resume watering only after 7–10 days. Severely rotted plants may not recover; offsets at the base can sometimes be saved if the parent rosette is lost.
Full guide: Overwatered or Underwatered? How to Tell Them Apart on Any HouseplantLeaves bleached pale red-orange
Symptom
Leaves lose their dark green colour and turn a pale orange-red, sometimes with crispy patches.
Cause
Sun stress — too much direct midday sun bleaches the chloroplasts.
Fix
Move to a position with bright but indirect light. Direct south-window sun in summer is too intense for this species. New leaves should grow in dark green within 2–3 months. Existing bleached leaves remain bleached but are not damaged at the cellular level.
Stretched, leggy growth with widely spaced leaves
Symptom
Rosette stretches vertically and leaves spread further apart; plant looks open and floppy.
Cause
Insufficient light — etiolation. The plant is reaching for more light.
Fix
Move to a brighter position with bright indirect light. Etiolated growth does not contract back into a tight rosette, but new growth above will be compact. Severely stretched specimens can be 'topped' — cut the rosette off above a few leaves, callus the cut, replant — to start fresh in better light.
White cottony fluff in leaf axils
Symptom
Cottony white masses tucked between leaves at the base; sticky residue on nearby surfaces.
Cause
Mealybug infestation — common in low-airflow indoor displays.
Fix
Dab each visible mealybug with a cotton swab dipped in 70 % isopropyl alcohol. Inspect the entire plant carefully — they hide deep in axils. Repeat weekly for 3–4 weeks. Severe infestations may warrant systemic insecticide.
- Mealybugs (in leaf axils)
- Spider mites (rare, in dry hot conditions)
- Scale (rare)
- Root rot (the dominant killer) from waterlogging
- Fungal leaf rot in stagnant humid air
Toxicity & safety
No reported toxicity. The species is sometimes confused with aloe, but contains no comparable irritant compounds.
Haworthiopsis attenuata — North Carolina Extension Gardener Plant ToolboxASPCA classifies haworthia (listed under the older genus Haworthia) as non-toxic to cats. The closest plant-style alternative to aloe vera (which IS toxic to cats) for pet households.
Haworthia — ASPCA Toxic and Non-Toxic PlantsASPCA classifies haworthia as non-toxic to dogs. A safe succulent option for dog households.
Haworthia — ASPCA Toxic and Non-Toxic PlantsWhy this is the safest succulent for pet households
Most popular small succulents are toxic or mildly toxic to cats and dogs. Aloe vera triggers vomiting, diarrhoea, and tremors. Jade plant (Crassula ovata) causes vomiting and depression in dogs and is more severely toxic to cats. Kalanchoe is cardiotoxic. Even agave can cause oral irritation. The succulent shelf in a home with curious pets is a minefield.
Haworthiopsis attenuata is the standout exception. ASPCA explicitly classifies haworthia as non-toxic to both cats and dogs, with no reports of significant ingestion problems. Combined with the species' tolerance of moderate light, infrequent watering needs, and visually striking zebra-banded leaves, it is the textbook recommendation for a pet-safe succulent in a Nordic apartment. The leaves are pointed but not sharp enough to cause injury, and the plant is small enough to stand on a high shelf or windowsill where casual nibbling is unlikely.
Why Haworthiopsis tolerates more shade than other succulents
Haworthiopsis attenuata's wild habitat is not the open Karoo desert but rocky crevices and the partial shade of larger shrubs in the Eastern Cape — a far less brutal light environment than agaves and most cacti experience. The species' dark green leaves are chloroplast-dense and built for capturing diffuse light, not for surviving harsh full sun. Direct midday sun actually bleaches the leaves to a pale orange-red within weeks, which surprises growers expecting succulent-typical sun-loving behaviour.
Practical implication: Haworthiopsis is one of the rare succulent-style plants that thrives in apartments without bright south windows. East, west, or even moderately bright north windows are sufficient. This makes it a particularly good choice for North-European apartments at high latitudes where bright sun is brief in winter — the plant grows steadily through the dark months without supplemental lighting, unlike most succulents which stretch and weaken in low winter light.
Haworthiopsis attenuata was reclassified out of the genus Haworthia in 2013 based on molecular phylogenetic analysis — DNA work showed that the old broad genus Haworthia actually contained three distinct lineages that diverged millions of years apart. The hard, rigid, opaque-leaved 'haworthias' moved to the new genus Haworthiopsis, while the soft, semi-translucent 'window-leaved' species (like H. cooperi) stayed in Haworthia. Most retailers and gardeners still use the old 'Haworthia attenuata' name; both are correct in everyday usage.
Frequently asked · 5
Is Haworthiopsis attenuata (zebra haworthia) safe for cats and dogs?+
Yes — ASPCA classifies haworthia (including H. attenuata) as non-toxic to both cats and dogs. It is the safest succulent for pet households. Most other small succulents (aloe, jade, kalanchoe) are toxic to varying degrees; haworthia is the standout exception. Mechanical irritation from chewing the firm leaves is possible, but no chemical toxicity.
How often do I water a haworthia?+
Whenever the soil is fully dry — typically every 2–3 weeks in summer and every 4–6 weeks in winter. Overwatering is the leading cause of haworthia death. Use the finger test to 5 cm depth before watering; never water on a calendar. The species is a small succulent with limited water-storage capacity and rots fast in soggy soil.
Why did my haworthia turn mushy?+
Almost always overwatering. The species rots fast in waterlogged soil. Stop watering immediately, unpot, inspect the roots, and trim away any black rotten sections. Let the rootball dry for 24–48 hours, repot in dry succulent mix, and resume watering only after 7–10 days. Severely rotted plants may not recover; healthy offsets at the base can sometimes be saved separately.
Will my haworthia grow in low light?+
Yes — Haworthiopsis attenuata is unusually shade-tolerant for a succulent. Its wild habitat is rocky crevices and partial shade in South Africa, not open desert. Bright indirect light from any direction is ideal; harsh midday direct sun actually bleaches the leaves to pale orange-red. One of the few succulents that does well in apartments without bright south windows.
What is the difference between Haworthia and Haworthiopsis?+
A 2013 reclassification split the old genus Haworthia into three based on DNA analysis. The hard, rigid, opaque-leaved 'zebra' species moved to Haworthiopsis (including the species sold as zebra plant); the soft, semi-translucent 'window' species (like H. cooperi) stayed in Haworthia. Most retailers and gardeners still use the older 'Haworthia attenuata' name — both names refer to the same plant.