Stromanthe Sanguiena Triostar Care: What to Know

Welcome to HealthyHouseplants.com, where we teach you all about gardening in the great indoors. If you’d like to support my show and get help growing your houseplants, check out my Patreon below.

Today, we have a plant care video for the gorgeous Stromanthe Triostar, also known as Stromanthe sanguinea or Stromanthe Thalia Triostar. I love how this plant is so eye-catching with its color combination of pink, green, and cream on the top of the leaves, and the absolutely gorgeous maroon on the underside. This plant is one of those that, when you enter your indoor garden, you see from across the room and can’t help but stare at it. Stromanthe can grow 2 to 3 feet high and 1 to 2 feet wide in your indoor garden.

Native to the jungles of Brazil, where it grows in the understory, Stromanthe Triostar is a member of the Marantaceae family, which means it is related to the Prayer Plant, Calathea, and Tenanthera—all known for their striking color patterns on variegated leaves. I have care videos on all of these plants, which I will link below, as well as any other videos I mention in this video.

Like many plants in the Marantaceae family, Stromanthe Triostar can be a bit difficult to grow indoors, but with the following growing tips, you can keep your plant healthy and happy in your indoor garden.

Lighting: As mentioned, Stromanthe Triostar grows on the forest floor, which means it does not tolerate bright light well. It does best in medium light. Good locations include 2 to 3 feet from an unobstructed eastern exposure window or under full-spectrum lighting. They will also do well in rooms with a lot of surrounding good light, such as sunrooms. However, in such cases, keep them away from the windows and positioned in the center of the room to avoid direct light. Too much bright, direct light can cause the leaves to curl inward and become sunburned.

Watering: Proper watering is crucial for keeping Stromanthe Triostar healthy. The plant does not like to dry out; if it does, the leaves will curl inward, and you may experience leaf loss. At the same time, avoid overwatering, as the plant does not like to be waterlogged. Aim to keep the soil consistently moist. Water when the top inch of soil has dried out and the moisture meter inserted 1/3 of the way into the pot registers 4. Always use warm water and preferably distilled, filtered, reverse osmosis, or rainwater, as Stromanthe can be sensitive to minerals in tap water like chlorine, chloramine, and fluoride.

Fertilizing: Stromanthe Triostar should be fertilized monthly from spring through late summer with a half-strength solution of an organic fertilizer. Chemical fertilizers are too harsh for this plant. Do not fertilize in the fall and winter months when the plant slows down its growth.

Humidity: Given its jungle origins, Stromanthe requires fairly high humidity to remain healthy and vibrant. If the humidity is too low, the leaves will brown at the edges and tips, and the leaves may drop. The ideal humidity range is 50% to 65%. Use a hygrometer to check your home’s humidity level. If it’s lower, increase the humidity with pebble trays, misting, a humidifier, or by grouping plants. Check out my humidity playlist, linked below, for further ideas on increasing humidity. When misting, use filtered water, as tap water can cause spotting on Stromanthe leaves.

Temperature: Stromanthe does not respond well to cold temperatures. The ideal temperature range is 70 to 85°F, though it can tolerate 65°F. Keep the plant away from cold drafts and forced air heating or air conditioning ducts. Smaller rooms like bathrooms can be good locations for Stromanthe, especially during colder months, provided they have light from a window or full-spectrum lighting.

Repotting: Repot Stromanthe Triostar when it has outgrown its pot, typically when the plant is 1/3 taller than the pot. Avoid repotting during the cold months; wait until spring and continue repotting through summer. Use high-quality organic potting soil that is rich but has drainage agents to prevent bogginess.

Pruning: Stromanthe doesn’t require much pruning. Simply cut out old leaves at the base of the plant, being careful not to cut into the stems.

Pests and Diseases: Stromanthe can attract spider mites if the humidity is low. Treat spider mites by spraying them off with water and then applying neem oil, which will kill eggs and cause adults to become infertile. You can also use horticultural soap to manage spider mites, especially in severe infestations. Increasing humidity will help prevent spider mites, as they thrive in dry conditions.

There you go—how to keep your beautiful Stromanthe Triostar happy and healthy in your indoor garden. Thank you for stopping by today. Please leave any comments about indoor gardening tutorials you’d like to see. Remember to like, comment, subscribe, and share this video, and hit the bell if you’d like to be notified when new videos are released.

Patreon:   / healthyhouseplants  

One-time donation: https://ko-fi.com/healthyhouseplants

Sign up for my monthly newsletter: http://eepurl.com/g1PCSH 

As an Amazon Associate I earn from qualifying purchases. I may earn commissions for purchases made through the links below.

Perky Plant fertilizer: https://amzn.to/3RdLA00

Espoma fertilizer: https://amzn.to/3vPa9bs

Full-spectrum Light Bulb-Large: https://amzn.to/3yR6VBu

Full-spectrum Lighting: https://amzn.to/3qhhaiv

Moisture meter: https://amzn.to/3TEUu5N

Hygrometer: https://amzn.to/3Cf6h2F

ProMix potting soil: https://amzn.to/3iVIrjE

My Organic Green Gourmet Houseplant Fertilizer: https://healthyhouseplants.storenvy.com