Houseplants

Free Tools for Every Stage of Indoor Plant Care

Indoor plant care has become one of the fastest-growing hobbies in the last decade — and for good reason. Houseplants improve air quality, reduce stress, and transform any space. But keeping plants alive and thriving requires more than just occasional watering. These tools give you the science behind what your plants actually need: the right watering interval for each species, the correct soil mix ratios, the light levels different plants require, and whether a plant is safe to have around your pets or children.

Watering — The Most Common Problem With Houseplants

Overwatering kills more houseplants than any other cause. The problem is that watering needs vary dramatically by species, pot material, pot size, season, and light conditions. A succulent in a terracotta pot in a bright south window needs water once every 10-14 days. A pothos in a plastic pot in indirect light may need water every 7-10 days. A humidity-loving calathea in a terracotta pot may need water every 5-7 days. The Watering Schedule Calculator takes all these variables into account and gives you a specific watering interval rather than a generic rule.

The right amount of water matters as much as the interval. Most people either barely wet the soil surface or flood the pot. Proper watering means saturating the entire root zone until water drains from the bottom, then letting the top inch or two dry before watering again. For large pots, that typically means more water than you think — a 10-inch pot might need a full liter of water per watering session.

Light — The Variable Most Plant Owners Underestimate

Plants live or die by light. A plant labeled "low light" doesn't mean it can survive in a dark corner — it means it can survive on less light than sun-loving plants. In foot-candle terms, true low light is 25-100 foot-candles (a north window or interior room). Medium light is 100-500 foot-candles (east or west window, or a few feet from a south window). High light is 500-1,000+ foot-candles (direct south window). Most "medium light" plants start suffering below 200 foot-candles after just a few weeks.

The Plant Light Requirements Guide gives specific foot-candle ranges for 100+ common species, so you know whether your space is actually bright enough. The Window Direction Light Estimator calculates estimated foot-candles based on your window orientation, size, and obstructions. If your space doesn't provide enough light, the Grow Light Distance Calculator shows how to supplement with LED or fluorescent fixtures.

Soil and Potting — Getting the Foundation Right

Commercial potting mixes are often too dense for tropical plants and too moisture-retaining for succulents and cacti. Understanding soil amendments — perlite for drainage, orchid bark for aeration, coco coir for moisture retention — lets you customize a mix for your specific plants. A monstera thrives in a well-draining mix with 60% potting soil, 30% perlite, and 10% orchid bark. A succulent needs 50% potting mix and 50% coarse sand or perlite. A peace lily does best in a standard mix with minimal amendment. The Soil Mix Recipe Generator shows the right ratios for each plant type.

When it comes to pot size, bigger is not always better. An oversized pot holds more soil than the roots can absorb, leading to root rot from standing moisture. The rule is to size up by only 1-2 inches in diameter at a time. The Pot Size Calculator recommends the right upgrade based on your current pot and plant species. And the Repotting Schedule Planner tells you when to repot — typically every 1-2 years for fast growers, every 3-4 years for slow ones.

Plant Safety — Toxicity for Pets and Children

Many beautiful houseplants are toxic to cats, dogs, or small children. Pothos (Epipremnum aureum) is one of the most popular indoor plants and one of the most toxic to cats — causing oral irritation, vomiting, and difficulty swallowing if ingested. Peace lilies cause similar symptoms. Sago palms are extremely dangerous to dogs, with liver failure possible from a small amount. ZZ plants, philodendrons, dieffenbachia, and many others are toxic to varying degrees. The Plant Toxicity Checker covers 200+ plants with toxicity ratings for cats, dogs, and children, sourced from ASPCA data.

Fertilizing — Feeding at the Right Time and Rate

Plants need different nutrients at different growth stages and seasons. Most houseplants should only be fertilized during active growth (spring and summer) and should receive no fertilizer during winter dormancy. Over-fertilizing causes salt buildup in the soil, which burns roots and causes brown leaf tips. The Indoor Plant Fertilizer Calculator shows the correct dilution and frequency for your specific fertilizer's NPK ratio and your plant's needs.

Getting Started With the Right Plants

If you're new to houseplants, start with forgiving species that tolerate inconsistent watering and lower light: pothos, snake plants (Sansevieria), ZZ plants, spider plants, and peace lilies are all good choices. The Indoor Plant Care Cheatsheet gives a quick reference for the top 30 houseplants — water frequency, light needs, humidity preference, and difficulty level — so you can make informed decisions before buying. The Plant Parent Level Quiz helps identify which tier of plants suits your current level of commitment and experience.

For troubleshooting existing plants, the Plant Problem Diagnostic walks through a decision tree based on visible symptoms — yellowing leaves, brown tips, drooping, spots — to identify whether the cause is overwatering, underwatering, pests, nutrient deficiency, or disease. All tools run entirely in your browser with no signup required.