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The Infirmary

Expert pest control and plant disease troubleshooting protocols.

Plants That Repel Mosquitoes: What the Research Really Shows

October 26, 2026 by Mark Tavis
Potted lavender, basil and a scented geranium on a patio table on a summer evening

The Infirmary | Plants That Repel Mosquitoes Charts of “plants that keep bugs away” are among the most saved garden pins: citronella, lavender, basil, mint, … Read more

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How to Get Rid of Mealybugs on Houseplants (and Roots)

October 22, 2026 by Mark Tavis
White cottony mealybugs clustered in a leaf joint of a jade plant

The Infirmary | How to Get Rid of Mealybugs White, cottony fluff in the leaf joints, sticky leaves and slowly yellowing growth: those are mealybugs, … Read more

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How to Get Rid of Spider Mites on Houseplants (6-Step Plan)

October 22, 2026 by Mark Tavis
Close-up of spider mite webbing and stippling on a houseplant leaf

The Infirmary | How to Get Rid of Spider Mites Fine speckling on the leaves, a dull or bronzed look, and then delicate webbing between … Read more

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Plants Safe for Dogs: 20 ASPCA-Listed Non-Toxic Houseplants

October 26, 2026October 21, 2026 by Mark Tavis
Golden retriever resting next to dog-safe houseplants: spider plant, parlor palm and calathea

The Infirmary | Plants Safe for Dogs Dogs chew things, and houseplants are at nose height. Many of the most popular indoor plants, including pothos, … Read more

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How to Get Rid of Fungus Gnats: What Actually Works

October 26, 2026October 21, 2026 by Mark Tavis
Pothos in a terracotta pot with a yellow sticky trap and a sand top layer to control fungus gnats

The Infirmary | How to Get Rid of Fungus Gnats Those tiny black flies circling your houseplants and walking across the soil are almost always … Read more

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Dracaena Brown Tips: Causes and How to Fix Them

October 19, 2026October 17, 2026 by Mark Tavis
Dracaena Brown Tips dry tips next to a healthy green dracaena in a pot indoors

The Infirmary | Dracaena Brown Tips Brown, crispy leaf tips are the most common complaint about dracaenas: the corn plant (Dracaena fragrans), the dragon tree … Read more

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African Violet Not Blooming? 6 Causes and How to Fix Them

October 17, 2026 by Mark Tavis
African violet not blooming with healthy fuzzy green leaves but no flowers, in a small pot on a bright windowsill

The Infirmary | African Violet Not Blooming An African violet can flower almost all year, so a plant that sits there making leaves but no … Read more

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Croton Dropping Leaves? Causes and How to Stop It

October 23, 2026October 17, 2026 by Mark Tavis
Colorful croton plant indoors near a window with a few fallen red and yellow leaves on the floor beside the pot

The Infirmary | Croton Dropping Leaves Crotons (Codiaeum variegatum) are grown for their bold red, orange, yellow and green leaves, and they are known for … Read more

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Orchid Not Blooming? Why It Won’t Rebloom and How to Fix It

October 19, 2026October 15, 2026 by Mark Tavis
Moth orchid with healthy green leaves and a new flower spike emerging from the base, on a bright windowsill

The Infirmary | Orchid Not Blooming Your moth orchid flowered beautifully when you bought it, dropped its blooms, and has done nothing since. If your … 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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