Plants
Stromanthe
Stromanthe sanguinea · Marantaceae
Stromanthe, usually sold as the variety „Triostar“, is one of the most spectacular foliage plants there is: every leaf is a one-off in green, cream and pink, and the underside glows purple-red. To be honest, it is no beginner plant — it demands high humidity and soft water. Give it that, and you get a plant that looks like a living watercolour.
- Light
- Bright without direct sun; too little light makes the pink-and-white variegation revert to green.
- Watering
- Evenly and lightly moist with soft water; sensitive to lime, waterlogging and a dried-out root ball.
- Care level
- Demanding
- Botanical
- Stromanthe sanguinea
Botanically stromanthe belongs to the prayer plant family, making it a close relative of calathea, maranta and ctenanthe. Like them it performs the typical sleep movements: in the evening the leaves fold upward and show their red undersides — an effect you can deliberately stage, for instance in front of a light wall.
The variegation is both its beauty and its weakness. The white and pink areas of the leaf contain no chlorophyll and cannot contribute to photosynthesis. That is why stromanthe needs more light than its green relatives — bright, but without direct sun — and reacts more sensitively to every care mistake.
The most important success factor is humidity: 60 percent and above is ideal. In normally heated living rooms it will almost inevitably develop brown edges without help. A bright bathroom, a humidifier or a dense group of plants makes the difference between struggling and showpiece.
For watering the rule is: evenly, lightly moist with room-temperature, soft water. Hard tap water reliably produces brown tips on prayer plants. We recommend rainwater or filtered water left to stand overnight.
A tip from experience: do not buy a stromanthe from a market stall in winter. Even brief exposure to cold during transport damages the delicate foliage, and it often only shows days later. In the cold season we always wrap it in several layers — the plant repays it.
Is Stromanthe toxic to children and pets?
- Children
- Non-toxic
- Cats
- Non-toxic
- Dogs
- Non-toxic
Like all prayer plants, stromanthe is considered non-toxic to cats, dogs and people — one of the most beautiful pet-friendly foliage plants. Nibbling is still best discouraged.
Overview: toxic & non-toxic plants for cats, dogs and children
Care
- 01Bright to semi-shade without direct sun — variegated foliage needs more light than green.
- 02Keep humidity high (ideally above 60%): misting, a humidifier or a bright bathroom.
- 03Water to keep it evenly, lightly moist, using only soft, room-temperature water.
- 04Keep warm year-round at 20–25 °C, never below 16 °C, no draughts and no spot next to a radiator.
- 05Feed very lightly every four weeks from spring to autumn — prayer plants are sensitive to salts.
- 06When repotting use a loose, slightly acidic substrate and avoid damaging the root ball.
Frequently asked
- Is stromanthe toxic to cats and dogs?
- No. As a member of the prayer plant family, stromanthe is considered non-toxic to cats, dogs and people. That makes it one of the few genuinely spectacular foliage plants you can place in a pet household without concern.
- Why is my stromanthe getting brown leaf edges?
- The main causes are air that is too dry and water that is too hard — usually both together. Raise the humidity to above 60 percent and water with rainwater or filtered water. Direct sun and a spot next to a radiator also cause brown edges.
- Is Stromanthe Triostar hard to care for?
- Honestly, it is one of the more demanding houseplants. Success comes down to three things: high humidity, soft water and even warmth without draughts. If you can provide that foundation — a bright bathroom, for example — it is surprisingly little work.
- Why does stromanthe fold its leaves up in the evening?
- That is the natural sleep movement of the prayer plant family. A small joint at the leaf stalk lets the leaves fold upright as darkness falls, revealing the purple-red underside. In the morning they lower again — a sign the plant is healthy.