Tools in This Collection
Keeping Plants and Households Safe
A healthy plant collection requires staying on top of two parallel concerns: keeping plants free of pests and disease, and keeping pets and children safe from toxic species. These three tools give you the diagnosis and safety information you need without having to scroll through forums or consult multiple websites.
Toxicity: Know Before You Buy
The list of popular houseplants that are toxic to pets or children is longer than most people realize. Pothos (Epipremnum aureum) — one of the most common starter plants — causes oral irritation, excessive drooling, and vomiting in cats and dogs when ingested. Peace lilies are toxic to both cats and dogs and can cause kidney failure in cats in larger amounts. Philodendrons contain calcium oxalate crystals that cause burning and swelling of the mouth and throat. Sago palms are among the most dangerous, causing potentially fatal liver failure in dogs even from a small ingestion. ZZ plants, dieffenbachia, dracaena, and pothos are all on the ASPCA's toxic plant list.
The Plant Toxicity Checker covers 200+ species with toxicity ratings for cats, dogs, and children, sourced from ASPCA data. Before buying a new plant, run it through the checker — especially if you have curious pets or young children. The results include the specific toxic compounds, the symptoms they cause, and severity ratings so you can make an informed decision about whether the plant is appropriate for your household.
Diagnosing Plant Problems Early
Most plant problems follow visible patterns that, once you know what to look for, are fairly easy to diagnose. Yellowing leaves with a mushy stem base = root rot from overwatering. Yellow leaves that remain firm and fall off = nitrogen deficiency or natural aging. Brown crispy leaf tips = low humidity, salt buildup from over-fertilizing, or inconsistent watering. Wilting despite moist soil = root rot. Wilting with dry soil = underwatering. White powdery coating on leaves = powdery mildew. Sticky residue on leaves with tiny clusters of insects = aphids or mealybugs.
The Plant Problem Diagnostic walks you through a decision tree based on visible symptoms. Answer questions about where the damage appears (tips, edges, whole leaf, stem), the color of the damage (yellow, brown, black), and whether pests are visible. The tool identifies the most likely cause and provides treatment steps — whether that's adjusting watering, changing light, treating with neem oil, or removing infected material.
Indoor Companion Planting
Some plants genuinely do better grouped together. High-humidity lovers like ferns, orchids, calatheas, and peace lilies benefit from being clustered because their transpiration creates a shared microclimate with higher ambient humidity. Grouping plants also makes watering easier when you have multiple species with similar needs. The Indoor Companion Planting Guide helps you identify which plants share enough care requirements to coexist in the same spot — same light level, similar watering frequency, and compatible humidity needs.
Frequently Asked Questions
Is pothos toxic to cats?
Yes. Pothos (Epipremnum aureum) is toxic to cats and dogs. It contains insoluble calcium oxalate crystals that cause oral irritation, excessive drooling, vomiting, and difficulty swallowing when ingested. While rarely fatal in typical exposure amounts, it can cause significant discomfort. Keep pothos in hanging baskets or on high shelves out of reach.
What are signs of root rot in a houseplant?
Classic signs of root rot include: wilting despite moist soil, yellowing leaves with a mushy or discolored stem base, a foul smell from the soil, and soft brown roots when you unpot the plant. Root rot is caused by overwatering or poor drainage and is best treated early by removing affected roots and repotting in fresh, dry soil.
Why are my plant's leaf tips turning brown?
Brown leaf tips are most commonly caused by: low humidity (below 40%), inconsistent watering, fluoride or salt buildup in the soil from over-fertilizing, or direct air from heating or air conditioning vents. The Plant Problem Diagnostic can help narrow down the specific cause based on the pattern and location of browning.
Which houseplants are safe for cats and dogs?
Pet-safe options include: spider plants, Boston ferns, parlor palms, calatheas, peperomias, African violets, ponytail palms, and air plants (tillandsia). The Plant Toxicity Checker has a full list with safety ratings for cats, dogs, and children so you can verify any specific species before purchasing.
Can I group different types of houseplants together?
Yes, grouping plants with similar care needs works well and can improve local humidity. Good groupings: tropical humidity-lovers (ferns, orchids, calatheas, peace lilies) together near a humidifier or in a bathroom. Drought-tolerant succulents and cacti together in a bright window. Avoid mixing high-water-need plants with drought-tolerant species in the same spot.