Poison Fire Coral
Trichoderma cornu-damae
Trichoderma cornu-damae, commonly known as Poison Fire Coral, is a unique and striking plant from the Hypocreaceae family. With its vibrant colors and moderate care needs, it makes an excellent addition to indoor plant collections.
Everything it needs
9 essentials at a glance
Watering
Trichoderma cornu-damae prefers consistently moist soil but should not be waterlogged.
Water every 5-7 days, allowing the top inch of soil to dry out between waterings. In winter, reduce watering frequency to every 10-14 days. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and leaf drop.
Light
This plant thrives in partial shade, ideally receiving 4-6 hours of indirect sunlight daily.
Avoid direct sunlight as it can scorch the leaves. A location near a north or east-facing window is ideal, providing bright but filtered light.
Soil
Trichoderma cornu-damae prefers a well-draining, organic potting mix with a pH range of 5.5 to 6.5.
A mix of peat, perlite, and compost works well to ensure adequate drainage while retaining moisture.
Humidity
This plant thrives in high humidity levels of 60-80%.
To increase humidity, consider using a humidifier or placing a tray of water with pebbles beneath the pot. Signs of humidity stress include browning leaf tips and edges.
Temperature
The ideal temperature range for Trichoderma cornu-damae is between 65-75°F (18-24°C).
It is best suited for USDA hardiness zones 10-12. Protect from temperatures below 50°F (10°C) as it can suffer from cold stress.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 10-10-10, applying every 4-6 weeks during the growing season (spring and summer).
Reduce feeding in fall and winter. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Prune Trichoderma cornu-damae in early spring to maintain its shape and remove any dead or damaged leaves.
Use clean, sharp scissors or pruning shears. Deadheading is not necessary, but removing spent leaves can promote healthier growth.
Repotting
Repot every 1-2 years or when the plant becomes root-bound.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Carefully remove the plant from its pot, loosen the roots, and place it in fresh potting mix.
Propagation
Propagation can be done through stem cuttings.
Take a 4-6 inch cutting from a healthy stem, remove the lower leaves, and place it in a glass of water or directly into moist potting mix. Ensure the cutting is kept warm and humid until roots develop, which typically takes 2-4 weeks.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering or nutrient deficiency.
How to fix it
Check the soil moisture and reduce watering frequency. Consider fertilizing with a balanced fertilizer.
Browning leaf tips
Why it happens
Low humidity levels can lead to browning tips.
How to fix it
Increase humidity by misting the plant or using a humidifier.
Wilting
Why it happens
Under-watering or root rot can cause wilting.
How to fix it
Check the soil moisture and water thoroughly if dry. If root rot is suspected, remove the plant from the pot and trim away affected roots.
Pest infestations
Why it happens
Common pests include spider mites and aphids.
How to fix it
Inspect the plant regularly and treat infestations with insecticidal soap or neem oil.
Stunted growth
Why it happens
This may result from poor soil quality or lack of nutrients.
How to fix it
Repot in fresh potting mix and resume a regular fertilization schedule.
Care through the year
Spring
In spring, increase watering frequency as the plant begins to actively grow. Fertilize every 4-6 weeks to encourage new growth.
Summer
During summer, maintain consistent moisture and monitor for pests. Ensure the plant receives adequate indirect sunlight.
Fall
In fall, gradually reduce watering as the plant's growth slows. Continue fertilizing until late fall.
Winter
In winter, reduce watering to every 10-14 days and keep the plant in a warm location away from drafts.
Toxicity & Safety
Trichoderma cornu-damae is considered toxic if ingested. Symptoms of ingestion may include gastrointestinal upset, vomiting, and diarrhea in pets and children. All parts of the plant should be kept out of reach.
Good to know
Why are my Trichoderma cornu-damae leaves turning yellow?
Yellowing leaves can indicate over-watering or a nutrient deficiency. Check the soil moisture and adjust your watering schedule accordingly.
How often should I water my Poison Fire Coral?
Water every 5-7 days, allowing the top inch of soil to dry out between waterings. In winter, reduce watering to every 10-14 days.
What humidity level does Trichoderma cornu-damae prefer?
This plant thrives in humidity levels of 60-80%. Increasing humidity can help prevent browning leaf tips.
What type of soil is best for Poison Fire Coral?
A well-draining organic potting mix with a pH of 5.5 to 6.5 is ideal for Trichoderma cornu-damae.
When should I repot my Trichoderma cornu-damae?
Repot every 1-2 years or when you notice roots growing out of the drainage holes.
How can I propagate my Poison Fire Coral?
Propagation can be done through stem cuttings. Take a healthy cutting, place it in water or moist soil, and keep it warm and humid until roots develop.
Is Trichoderma cornu-damae toxic to pets?
Yes, this plant is toxic if ingested. Keep it out of reach of pets and children to avoid gastrointestinal upset.
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