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The Infirmary

Expert pest control and plant disease troubleshooting protocols.

Jade Plant Wrinkled Leaves: Thirsty or Root Rot? How to Tell

October 23, 2026April 18, 2026 by Mark Tavis
Jade plant wrinkled leaves: close-up of two wrinkled jade plant leaves side by side

The Infirmary | Crassula ovata Jade plant wrinkled leaves usually mean the plant is short of water. South Dakota State University Extension puts it plainly: … Read more

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Philodendron Birkin Reverting: Why It Happens and the Fix

October 19, 2026March 29, 2026 by Mark Tavis
Philodendron Birkin with pinstriped leaves and reverted solid green leaves

The Infirmary | Birkin Reversion Philodendron Birkin reverting means new leaves come out solid green or dark maroon, without the white pinstripes. It happens because … Read more

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Money Tree Care: Light, Watering, Braids and Yellow Leaves

October 21, 2026March 24, 2026 by Mark Tavis
Healthy Pachira aquatica Money Tree care with braided trunk and lush green canopy showing proper care without trunk rot or yellowing leaves

The Infirmary | Pachira aquatica Money tree care is mostly about water and light. NC State Extension says Pachira aquatica prefers indirect sunlight or a … Read more

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Monstera Thai Constellation Root Rot: Signs and What to Do

October 19, 2026March 9, 2026 by Mark Tavis
Monstera Thai Constellation root rot treatment showing surgical removal of infected brown mushy roots and hydrogen peroxide sterilization treatment protocol

The Infirmary | Monstera Thai Constellation Root Rot A Thai Constellation that wilts in wet soil, yellows quickly and smells sour at the roots probably … Read more

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How to Use Neem Oil on Plants Without Burning the Leaves

October 22, 2026December 26, 2025 by Mark Tavis
how to use neem oil on plants

The Infirmary | Pest Control How to use neem oil on plants without burning them comes down to three things: read which kind of neem … Read more

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Plant Leaves Turning Yellow? Find the Cause and Fix It

October 19, 2026December 23, 2025 by Mark Tavis
Plant Leaves Turning Yellow

The Infirmary | Leaf Diagnosis Plant leaves turning yellow are a symptom, not a disease, and where and how the yellow appears usually points to … Read more

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Diatomaceous Earth for Fungus Gnats: Does It Really Work?

October 21, 2026December 15, 2025 by Mark Tavis
Food-grade Diatomaceous Earth powder applied to houseplant soil to kill fungus gnat larvae.

The Infirmary | Diatomaceous Earth for Fungus Gnats Diatomaceous earth for fungus gnats in houseplants is often recommended online as a cure. It does kill … Read more

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Aloe Microstigma Care: Sun, Water and Why Leaves Turn Red

October 16, 2026December 14, 2025 by Mark Tavis
Aloe Microstigma showing vibrant red stress coloring in high light.

The Infirmary | Aloe Microstigma Care Aloe microstigma, the Karoo aloe or small-spotted aloe, is a South African aloe with blue-green leaves covered in small … Read more

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Data-driven botanical protocols and scientific troubleshooting for the modern grower. We simplify plant biology into actionable blueprints for high-performance urban gardening.

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