Plant care guides

Yellow leaves, brown tips, root rot, watering schedules and pet-safe plants — answered plainly, with the reasoning shown.

Plant problems

• Why are my Monstera leaves turning yellow?

  The most common cause is overwatering: when the soil never dries, roots run out of oxygen and the plant sheds leaves from the bottom up. But there are six separate causes, and you tell them apart by which leaves are yellowing and how wet the soil is.

• Why are my orchid roots rotting?

  Orchid roots rot because they stay wet — and the culprit is usually not watering frequency but ordinary potting soil, bark that has broken down, or water sitting in the decorative outer pot. A Phalaenopsis root needs contact with air; it dies from being soaked, not from being watered.

• What causes brown tips on houseplant leaves?

  Brown tips almost always mean water is not reaching the far end of the leaf. The reason is irregular watering, dry air, salt building up in the soil, or damaged roots — and because all four produce the same mark, you identify the cause by looking at the soil and at what you water with.

• Why is my plant dropping leaves?

  Leaf drop is not a disease — it is the plant cutting its running costs. The pattern gives away the cause: one bottom leaf at a time is usually normal or low light, a sudden mass drop means shock or roots, yellow-then-drop means overwatering, and crisp-then-drop means thirst.

• How to get rid of houseplant bugs

  Identify the pest first; the treatment differs completely between them. Then isolate the plant, clean it mechanically, and apply insecticidal soap or neem every 5–7 days, three to four times — a single application never works, because it does not kill eggs.

• How to tell if your plant has root rot

  The most reliable above-ground sign is a contradiction: the plant wilting while the soil is wet. Confirmation only comes from lifting the plant out — healthy roots are firm and pale, rotten roots are brown-black, soft, and their outer sheath slips off when squeezed.

Plant care

• How often should you water a snake plant?

  Every 2–3 weeks in summer and 4–6 weeks in winter — but treat that as a starting point, not a rule. A snake plant stores water in its leaves and needs its soil to dry completely. What kills it is nearly always too much water, almost never too little.

• Why is my succulent going soft?

  If the leaf is soft, translucent and waterlogged, the cause is overwatering: the cells have filled past bursting and that damage is permanent. If the leaf is wrinkled but firm, the plant is thirsty and one watering fixes it. The two look alike from a distance and need opposite responses.

• A watering schedule for houseplants

  A fixed schedule alone does not work — the same plant may want water every 5 days in a sunny room and every 15 in a dim corner. The table below gives starting intervals; you then adjust for pot, light, temperature and season.

• Signs you are overwatering your plant

  The clearest sign is a contradiction: wet soil and a wilting plant. Dying roots cannot move water, so the plant looks thirsty — and watering it again at this point accelerates the damage. Yellow lower leaves, mould on the soil and small black flies come with it.

• Signs your plant needs more water

  A thirsty plant wilts but recovers within hours of watering — the clearest difference from overwatering. Crisp brown leaf edges, leaves curling inward, a light pot and soil pulling away from the sides come with it.

• How often should you water an orchid?

  The usual interval is 7–10 days, or 10–14 in winter. But orchids give you something better than a calendar: root colour. Bright green roots mean there is still water; silvery grey means it is time.

• Easy houseplants for beginners

  The ten most forgiving: snake plant, ZZ, pothos, cast iron plant, cacti and succulents, philodendron, aglaonema, dracaena, spider plant and yucca. What they share is drought tolerance — they survive being forgotten. Not all are pet-safe, so narrow the list if you have a cat or dog.

• Houseplants for low light rooms

  Nine species that do not want direct sun: cast iron plant, ZZ, snake plant, pothos, philodendron, aglaonema, peace lily, Boston fern and calathea. But "low light" is not "no light": more than two metres from a window, or in a windowless space, none of them lasts.

• Monstera care: a complete guide

  Monstera wants bright indirect light, watering when the top 5 cm is dry, and a free-draining aroid mix. When leaves fail to split, the reason is nearly always low light or a young plant — it has nothing to do with watering or feeding.

Pets and plants

• Is Monstera toxic to cats?

  Yes. Monstera deliciosa contains insoluble calcium oxalate crystals, so a cat that chews it gets immediate burning in the mouth, heavy drooling, pawing at the face and often vomiting. It is painful but rarely fatal — and unlike true lilies, it does not cause kidney failure.

• Cat-safe houseplants

  Spider plant, areca palm, calathea, maranta, peperomia, Boston fern, hoya, pilea, cast iron plant, Phalaenopsis orchid, African violet and fittonia have no known toxicity to cats. Meanwhile lilies (Lilium, Hemerocallis) should never enter a home with a cat — even the pollen can cause kidney failure.

• Plants that are toxic to dogs

  The five most dangerous: sago palm, oleander, azalea/rhododendron, autumn crocus and yew — small amounts of these are life-threatening. The commoner indoor plants — monstera, philodendron, pothos, dieffenbachia — cause burning and vomiting: painful, but rarely fatal.

Plant identification

• How to identify a plant from a photo

  Photo identification compares leaf shape, venation, stem structure and any flowers against known species and returns a ranked list of probabilities. How good that result is depends mostly on the photo: one plant, sharp focus, daylight and a plain background raise the hit rate substantially.

• How to diagnose plant disease from a photo

  A photo shows the pattern on the leaf: the colour of a mark, its edge, its distribution and which leaves carry it. That narrows the cause considerably. What a photo cannot show is the roots, the soil moisture and your watering history — which is why a good assessment asks about conditions as well.