Houseplant · Asphodelaceae
Haworthia
Haworthia
Give it bright indirect light and a long dry spell between drinks, and this little windowed succulent asks for almost nothing.
Bright indirect
Every 14–21 days
59–81°F · 15–27°C
USDA 9–11
Overview
Haworthia is a small rosette succulent from the dry corners of southern Africa, built from thick, fleshy leaves that stack into a tight little star. Run a finger over one and it feels firm and cool, its skin taut with stored water, and many species carry translucent leaf windows at the very tips, small clear panes that seem to swallow and hold the light. The whole rosette stays low and compact, spanning just 3 to 6 inches (8 to 15 cm) across.
Depending on the species the leaves shift from deep green to a soft olive, some flecked with pale ridges or fine warty bumps, others polished smooth. Because it grows wild among rocks and grasses in part shade, it keeps that rich, unbleached green far better in medium light than a sun-loving echeveria would, and its color deepens rather than fades away from harsh sun. The leaves fan out in a symmetrical whorl, each rank angled a touch higher than the last.
In spring to summer a thin flower stalk rises well clear of the leaves, carrying a scatter of small white tubular flowers along its length. The blooms are modest against the sculptural rosette below, which is the real spectacle. Around the base, tight little offset pups push up as miniature copies of the parent, each a firm green star in its own right.
Care
The short version: bright indirect light, a gritty fast-draining mix, and a thorough watering only once the soil has dried out completely. Ease off in winter, feed lightly in the growing season, and never let it sit in water.
Light
Give it bright indirect light near a window that misses the harsh midday sun, where the green stays deep and the leaf windows keep their clarity. It holds on in medium or even low light better than most succulents, though too much direct sun stains the leaves red or brown.
Water
Let the soil dry out completely, then soak it until water runs from the bottom and the leaves swell taut again. In the growing season that lands at roughly every 14 to 21 days, and far less in winter. It is highly prone to root rot, so when in doubt, wait.
Soil
Plant it in a gritty cactus or succulent mix that drains fast and never stays soggy against the fleshy roots. A pH anywhere from 6.0 to 7.5 suits it, and a pot with drainage holes matters more than the exact recipe.
Temperature
Ordinary room warmth is ideal, somewhere between 59°F and 81°F (15°C to 27°C). Keep it clear of cold drafts and frost, since the water-filled leaves have no tolerance for freezing.
Humidity
Low household humidity is exactly what it wants, so there is no tray or mister to bother with. Dry air suits it fine, and it helps keep the plump leaves and roots free of rot.
Feeding
Feed lightly through spring and summer while it is growing, using a balanced liquid fertilizer at half strength. A single feeding now and then across the season is plenty for such a slow grower, and none is needed in winter.
Pruning
There is almost nothing to do here. Just pull off the dried, papery outer leaves as they spend themselves and snip away the thin flower stalks once the blooms fade.
Repotting
Repot every 2 to 3 years, or sooner when the offsets crowd and start lifting the whole cluster from the pot. Roots poking from the drainage holes or soil that dries out unusually fast are your other cues.
Size & spacing
This is a small, low plant, the rosette reaching only 3 to 6 inches (8 to 15 cm) tall and about as wide. A snug pot suits its shallow roots, and a cluster of the little green stars can share one shallow dish with just a little room between them.
Troubleshooting
Nearly every haworthia problem traces back to water or light, and the plant writes it plainly across its leaves and rosette. Look closely at the color, the firmness, and the shape of the star, then match what you see below before a small issue turns serious.
Soft, blackened leaf bases and a slumping crown
When the once-firm leaf bases turn soft, dark, and glassy and the center of the rosette slumps inward, the trouble is root and crown rot. It kills more haworthias than anything else, and it takes hold when the roots sit in wet, slow-draining soil. Lift the plant, pare away every soft brown root with a clean blade, let the cuts dry, and reset it into dry gritty mix.
Fix:
- Stop watering immediately
- Unpot and cut away all soft, rotted roots and tissue with a clean blade
- Allow cuts to callus, then repot into fresh dry gritty mix
- Resume watering only sparingly once established
Wrinkled, shriveled leaves gone thin and soft
Plump leaves that have crumpled into soft, thin, creased shells signal an underwatered plant emptying the reserves stored inside them. Check that the soil has gone bone dry all the way down, then water it thoroughly until the excess runs from the drainage holes. Within a few days the leaves swell taut and firm again.
Fix:
- Water thoroughly until it drains from the bottom
- Allow excess to drain fully
- Return to a regular dry-then-water cycle
Leaves washed with red, orange, or brown
A warm wash of red, orange, or brown creeping across the green is sun stress, not disease, and it stains the leaf faces turned toward the window first. Draw the plant back into bright indirect light and the spread halts. The stained leaves hold their color for good, but the growth that follows unfurls in clean green.
Fix:
- Move the plant to bright indirect light
- Shade from intense midday sun
- Damaged leaves will not recover but new growth returns to normal color
A pale, stretched rosette pulling open at the leaves
As the tight green star loosens, pales toward a washed-out tint, and tips toward the glass with widening gaps between its leaves, the plant is reaching for weak light in a stretch called etiolation. Move it to strong indirect light and turn the pot from time to time. Fresh growth then knits back into a tighter, more even rosette.
Fix:
- Move to a brighter spot with bright indirect light
- Rotate the pot regularly for even growth
Toxicity
Good news for a houseplant: haworthia is non-toxic and pet-safe. It is not on the ASPCA's toxic list, and nothing in the thick, juicy leaves can harm a cat, dog, or curious child. A stray nibble at the firm tissue might bring a brief stomach ache, but no poisoning.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Safe to keep beside a cat. A nibble at the firm leaves might bring a passing bit of stomach upset, but nothing toxic.
Dogs None
No poisoning risk to a dog. Chewing the tough, fibrous leaves may leave a determined dog mildly queasy, and nothing worse.
Horses None
Not toxic to horses, and far too small a rosette to draw a grazing animal's notice.
Rabbits None
A rabbit can bite the thick, juicy leaves without harm, since they carry no toxins.
Livestock None
No risk to grazing animals, and as a small indoor pot plant it rarely lands within their reach.
Birds None
Safe around pet birds, with no toxic compounds anywhere in the fleshy leaves.
People None
Not poisonous to people, children included. It is not grown to eat, so there is no reason to taste the leaves, but a stray nibble does no harm.
Varieties
The genus runs to dozens of species, and the differences show most in the leaves, from rounded and dome-tipped to sheared off flat across clear windows. A few forms turn up again and again on windowsills.
Haworthia cooperi
Its leaves are plump and rounded, each swelling to a soft dome tipped with a translucent window that lights up when the sun passes through from behind.
Haworthia cymbiformis
Its boat-shaped leaves curve inward and pack into a tight rosette, each one veined near the tip with faint, glassy window markings.
Haworthia retusa
Its thick triangular leaves splay into a flat green star, their upper faces pressed clear and translucent like little panes.
Haworthia truncata
Its leaves rise in a blunt row and look sheared off flat across their windowed tops, packed side by side like a set of a horse's teeth.
How to propagate
Haworthia makes more of itself with very little help, sending up tight clusters of miniature rosettes that all but ask to be potted on their own.
Offsets & pupsEasy
Spring to summer during active growth · 4 to 8 weeks to root
The easiest start is with the offsets, the little pups that crowd in a ring around the base, taken in spring or summer while the plant grows. Ease each miniature rosette away from the parent, let the pale cut end dry and firm for a day or two, and settle it into dry gritty mix. Roots follow in about 4 to 8 weeks.
DivisionEasy
Spring, often at repotting · 4 to 8 weeks
When a single plant has swelled into a knot of crowded rosettes, split it in spring while it is out for repotting. Work the pale, threadlike roots apart so each rosette keeps its own share, then pot the pieces separately. They knit in over roughly 4 to 8 weeks.
Leaf cuttingsModerate
Spring to summer · Several weeks to a few months
A whole new plant can rise from a single fat leaf taken in spring or summer. Pull a healthy leaf away at the base, let the wound callus over, and lay it flat on dry mix. It is a slower, less certain path than the pups, and tiny roots may take several weeks to a few months to appear.
Myths
Haworthia needs full, direct sun all day like a desert cactus.
In the wild it sits tucked into part shade among rocks and grasses rather than out in the open glare. It looks its best in bright indirect light, where harsh direct sun would only scorch the leaves and stain them red and brown.
Haworthia is a kind of aloe.
The two were once grouped together and still share the family Asphodelaceae, which is where the confusion comes from. In truth haworthia is its own genus of small rosette succulents, quite separate from the true aloes.