Stromanthe Triostar

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Its pink runs richest close to a sunny window, in a spot the rays never reach. A dimmer room keeps it growing, only paler; direct sun can scorch the leaves.

Morning light from an east window suits it, and so can the sill of a north window (RHS). If your room faces south, set it well back, with a sheer between it and the glass.

Watch it through a day and you’ll see the leaves move. In the morning they turn east to catch the early light. By midday they stand more upright, so less of each blade faces the strongest sun (University of Wisconsin Extension).

The cream and pink vary from leaf to leaf. Some leaves come in nearly all cream, and others are nearly all green with a few streaks (University of Wisconsin Extension), so one greener leaf isn’t a verdict on its spot.

Pink is the first color to fade when light runs short, so let the newest leaves tell you whether it wants a move closer to the window.

Aim for soil that’s evenly moist, never mud: every 5-7 days in summer, 7-10 in winter. Dry soil bothers it, and soggy soil can rot the roots.

Its leaf edges are the first to complain about dry air: when the heat comes on in winter, they can dry out from the edges in (University of Wisconsin Extension). If that bothers you, running a humidifier or setting the pot on damp pebbles may help (NC State); the RHS suggests 60 percent humidity or more. It gets by without either, just with crisper edges.

Are browned tips bothering you? Rainwater, or filtered or distilled water, may help, since the RHS notes it’s sensitive to fluoride in tap water. It carries on with or without the switch.

When it needs a new pot, the RHS advises going only slightly larger.

Gone for a while? A week is fine if it’s watered well the day you leave. Much longer and dry soil browns the leaf edges.

Long leaves on pink stems rise from a clump at the base, 1.5-3 feet tall and 1-2 feet wide. Pretty on a plant stand or the floor, in a pot with room for the clump to widen.

It spreads from rhizomes, short creeping stems under the soil (University of Wisconsin Extension), so new shoots fill the pot outward over time. Leaves also come from branching stems, not only from the base (Missouri Botanical Garden), which gives an older plant its layered, full look.

Those rhizomes are where it splits: in spring, before new growth starts, the clump can be cut apart along them (NC State). The RHS suggests repotting every 2-3 years.

Its pink stems hide inside the mound when seen from above, so a spot where you meet it from the side, like a stand beside a window, shows them off.

Nothing harmful here for dogs, cats, or kids. NC State tags it pet friendly, the ASPCA lists its cousin the prayer plant as non-toxic, and extension sources rate it nonpoisonous.

It belongs to the prayer-plant family, Marantaceae (NC State), so the cousin on the ASPCA’s list is close kin, not a distant one.

The bigger risk runs the other way. A cat that chews the long, glossy leaves can leave tears and bite marks in the cream and pink, and each damaged leaf keeps its scars.

With a toddler, a heavy pot keeps the plant upright when small hands tug at the stems. If a cat starts batting the pink leaves around, a spot out of its reach keeps the color unmarked.

1. UConn Extension: safe for kids.

Cats and dogs: No vet database lists it; rated from university extension sources.

Kids: No poison-centre listing; rated from university extension sources.

Happiest at 65-80°F, and it shouldn’t sit below 50°F. It wants at least 45% humidity.

Temperature

65-80°F

Spider mites are the common guest, so flip a leaf and look underneath. Mealybugs tuck into leaf axils, petiole bases, and the crown, and aphids favor new unfurling leaves. A weekly peek spots trouble early.

• Spider mites
• Mealybugs
• Aphids

Spider mites are the pest to watch, especially in dry winter air. Mealybugs and aphids turn up now and then, and root and stem rot if the soil stays soggy (per NC State Extension).

Spider mites leave fine webbing and a dusty, speckled look, mostly under the leaves. Rinse the whole plant in the shower, undersides included, and do it again each week until they’re gone; if they hang on, spray insecticidal soap. More humid air helps keep them away.

Mealybugs look like tufts of white cotton where the leaf stalks meet; aphids are small, soft, green bugs on new leaves. Wipe mealybugs off with a cotton swab dipped in rubbing alcohol, and rinse aphids off in the shower.

Rot shows as stems going soft and dark at the base while the soil is wet. Cut those stems off, empty the saucer, and let the top of the soil dry a little before the next soak.

While it grows in spring and summer, give it low-nitrogen liquid feed every 2-3 weeks, about 10 times a year. Snip dried leaves as needed, and wipe dust off twice a year. Divide the clump each spring.

• Feed10× a year
• Prune6× a year
• Divide1× a year
• Clean leaves2× a year

A rich potting mix that holds moisture but drains fast, in a pot with a drainage hole.

Repot when the clump fills the pot, in spring before new growth starts; that’s also the time to divide it (see Propagation).

Food is optional: a houseplant fertilizer now and then in spring and summer, and none in fall and winter (per UW–Madison Extension).

Each long leaf is streaked cream, pink, and green, with a rosy underside, on pink stems. The surface has a gentle sheen, and the clump is full enough to cover part of the soil.