The Triostar Stromanthe (Stromanthe sanguinea) has impressive, full variegate foliage with vibrant shades of pink. It does well indoors and is more commonly grown as a house plant, but it can also be grown outdoors in hot and humid climates.
This isn't a plant for novice horticulturists. It needs a lot of nurturing to keep it thriving.
Although flowers can develop on this plant in spring when kept outdoors, it's the large, colorful leaves that are its star attraction.
|Botanical Name||Stromanthe sanguinea|
|Common Name||Stromanthe Triostar|
|Plant Type||Tropical perennial|
|Mature Size||2 to 3 feet|
|Sun Exposure||Part sun|
|Soil Type||Light, well-draining soil|
|Soil pH||Not too particular, but generally between 6 to 8|
|Bloom Time||Rarely blooms, but if it does it will be between March and April|
|Hardiness Zones||10 to 12|
|Native Area||Amazon jungle in South America|
How to Grow Triostar Stromanthe
Triostars grow best in warm, humid conditions, and this is why they tend to be an ideal house plant, sitting in a window with sufficient indirect light.
Turning the plant around once a week can help ensure a good, even distribution of the leaves, as they'll grow in the direction of the light. Misting can also help to create the humidity they need.
Triostar Stromanthe should be potted in a well-drained, fertile soil that is kept moist but not soggy.
Tropical plants often need light that mimics what would be found in a rainforest environment.
Positioning your Triostar Stromanthe in an area with dappled light will provide it with the best chance of flourishing. If it receives too much direct sun, it can burn the leaves.
Your Triostar needs a breathable, light and well-draining soil. Although it needs to retain moisture, it shouldn't be too heavy or claggy.
Ensuring your Triostar gets a consistent and appropriate amount of water is vital. Get this wrong, and the plant can quickly become unhealthy looking.
Keeping the soil constantly moist, but not waterlogged, is preferable. In cooler weather, this plant can be kept a little drier. Allowing just the top inch of soil to dry before rewatering usually provides good results.
This plant can even be fussy about the quality and temperature of the water. Tap water doesn't produce the best results. Distilled water is ideal or, at a push, spring water will also work. Make sure the water isn't over chilled either.
Temperature and Humidity
As you would expect with a tropical plant variety, the Triostar prefers a humid environment and warm temperatures. It does best in temperatures of around 65°F (18°C) to 80°F (27°C).
Many people keep their Triostars on a bathroom window. That way they get plenty of humidity. They don't like environments that have harsh, dry air-conditioning.
Feeding your Triostar with a diluted, balanced fertilizer every couple of weeks can encourage it to thrive. Make sure the solution isn't too strong or applied too frequently as this can result in root burn.
If you opt for an organic fertilizer, they tend to be less strong, and you might not need to dilute it.
Your plant won't need fertilized during its dormancy in the winter months.
Propagating Triostar Stromanthe
Unfortunately, you're not going to be able to grow one of these plants from a stem cutting.
If you're keen to grow another plant, you can separate some of the rhizomes (clumps of roots) from a healthy mother plant.
You just need to make sure each division has at least three or four leaves attached to it, that you use a good quality, moist potting soil, and that you undertake the task in spring or summer. You want to make the divisions before any new growth starts.
Being Grown in Containers
As common houseplants, Triostars do well in containers. You just need to ensure that the pots are deep enough to accommodate the roots, but not so deep that water will sink and become stagnant.
Plenty of drainage holes are required to prevent water-logging too.
Repotting your plant after a couple of years can help them thrive. Look out for the roots beginning to grow out the bottom of the container. When you see this, it's probably time to move them. It's best to do this in the spring.