Houseplant Care FAQ
Below are the houseplant questions we see most often. Each answer links through to a full guide where there is more to say. If your question is not here, please get in touch — reader questions are how this FAQ grows.
Watering
How often should I water my houseplants?
There is no universal schedule. The reliable rule is to push a finger 2–3 cm into the soil — if it feels dry, water thoroughly until liquid drains out the bottom; if it still feels damp, wait a few more days. Most common houseplants prefer the top of their soil to dry between waterings rather than being kept constantly moist.
For the full method — including how to water for different pot sizes and the bottom-watering trick — see our guide on how to water houseplants the right way.
What kind of water is best — tap, filtered, or rainwater?
For most houseplants, room-temperature tap water left out overnight is perfectly fine. The exceptions are sensitive species like calatheas, marantas, dracaenas and spider plants, which often react to fluoride and chlorine with brown leaf tips — for them, switch to filtered, distilled, or rainwater. Cold water straight from the tap can shock tropical roots; let it warm to room temperature first.
Should I bottom-water or top-water?
Both work. Bottom-watering (placing the pot in a tray of water for 20–30 minutes) hydrates the entire root ball evenly and is excellent for fuzzy-leaved plants like African violets that hate water on their foliage. Top-watering is faster and flushes accumulated salts from the soil — alternate the two methods every few weeks for the healthiest plants.
Light
What does "bright indirect light" actually mean?
Bright indirect light is the amount of light you get a few feet back from a sunny window, or beside a bright window where the sun never lands directly on the leaves. A useful shortcut: if you can comfortably read a book at that spot during the day without turning on a lamp, the light is bright enough for most popular houseplants.
For a complete framework — including how to read light by window direction — see how much light do houseplants need.
Which plants survive in a dim apartment?
ZZ plant, snake plant, pothos, cast-iron plant, parlour palm, philodendron and Chinese evergreen all tolerate genuinely low light without giving up. They will grow slowly, but they will not decline. See our list of 12 best low-light indoor plants for the full lineup.
Can grow lights replace sunlight?
Yes — a decent full-spectrum LED grow light run for 10–12 hours a day can keep almost any houseplant healthy and even encourage flowering. Position it 30–45 cm above the plant. Cheap clip-on grow lamps work for one or two plants; full-shelf setups are needed for larger collections.
Troubleshooting
Why are my plant's leaves turning yellow?
Overwatering is the single most common cause of yellowing leaves on houseplants, followed by underwatering, low light, nutrient deficiency and pests. Check the soil moisture first: soggy soil plus mushy roots points to root rot; bone-dry soil with limp leaves points to underwatering.
The full diagnostic flowchart, with photos of each pattern, is in our guide on why your plant's leaves are turning yellow.
Why is my plant dropping leaves suddenly?
Sudden leaf drop almost always means a sudden change — a move to a different room, a temperature swing, a cold draft, or letting the plant dry out far longer than usual. Stabilise conditions and the plant typically recovers within a few weeks. Slow, steady leaf drop usually means too little light or chronic over- or under-watering.
Why does my plant have brown crispy leaf tips?
Brown crispy tips almost always mean low humidity, fluoride and chlorine in tap water, or accumulated fertiliser salts in the soil. Switch to filtered or rainwater, raise humidity with a small humidifier, and flush the pot under running water for two minutes every few months to wash out salts.
Repotting & soil
How do I know when a plant needs repotting?
Signs include roots circling the bottom or growing out the drainage holes, water rushing straight through without soaking in, soil that dries out within a day or two, and visible slowing of growth despite good light and feeding. Repot one pot size up (about 2.5 cm wider) in spring or early summer when possible. The full step-by-step is in how to repot a plant without killing it.
Can I use garden soil for houseplants?
No. Garden soil is too dense for pots — it compacts, holds too much water and suffocates roots, and may carry pests, weed seeds and pathogens indoors. Use a quality indoor potting mix, or amend it with perlite and orchid bark for chunkier, faster-draining structure. See the best soil for indoor plants for our recommended mixes and DIY recipes.
Do houseplant pots really need drainage holes?
Practically, yes. A pot without drainage is the single fastest route to root rot, because excess water has nowhere to go. If you love a decorative pot with no holes, use it as a cachepot — keep the plant in a plain plastic nursery pot with drainage and slip that inside the decorative one. Tip out any standing water 15 minutes after watering.
Feeding
How often should I fertilize my houseplants?
During active growth in spring and summer, a balanced liquid fertilizer at half strength every 2–4 weeks suits most houseplants. Skip feeding in autumn and winter when growth slows, and never fertilize bone-dry soil — water first to avoid root burn. The complete schedule and what N-P-K means is covered in how to fertilize houseplants.
Are coffee grounds or eggshells good for houseplants?
Mostly no. Coffee grounds applied directly to the soil mould easily, attract fungus gnats and can acidify the mix more than most houseplants like. Eggshells break down too slowly to deliver useful calcium in a pot's timeframe. A proper balanced liquid fertilizer is cheaper, cleaner and far more effective.
Humidity
Do I need to mist my houseplants?
Misting raises humidity for only a few minutes, so it does almost nothing for plants that genuinely need high humidity. If your home is very dry, a small humidifier or grouping plants together is far more effective. Misting is fine as a leaf-cleaning ritual but should not be relied on as humidity therapy.
What is the easiest way to raise humidity around plants?
A small cool-mist humidifier near your plant cluster is the only method that reliably moves a hygrometer. Grouping plants together is a useful second step. Pebble trays and misting look the part but barely change ambient humidity. The full ranking — and which plants actually need it — is in our houseplant humidity guide.
Propagation
How do I propagate a houseplant for free?
For most trailing and vining plants — pothos, philodendron, monstera, hoya — cut a stem just below a node, place the node in a jar of water, and change the water weekly until roots are 5 cm long. Then transfer to soil. Snake plants and succulents propagate from leaf cuttings; spider plants and strawberry begonias produce plantlets you can pin into soil. Full method-by-method instructions are in how to propagate houseplants for free.
How long does it take cuttings to root?
Most pothos, philodendron and tradescantia cuttings produce visible roots within 1–3 weeks in water. Monstera and rubber plant cuttings take 3–6 weeks. Snake plant leaf cuttings are slowest at 6–12 weeks. Warmth and bright indirect light speed all of these up.
Pests
How do I get rid of tiny flies around my houseplants?
Those are almost always fungus gnats, which breed in damp potting soil. Let the top 2–3 cm of soil dry fully between waterings, set out yellow sticky traps to catch the flying adults, and treat persistent infestations with a Bacillus thuringiensis israelensis (BTi) product like mosquito bits steeped in the water you use for the plants. Our full guide to common houseplant pests covers spider mites, mealybugs and scale too.
What are the tiny webs on my plant?
Fine webbing across leaf undersides and stems means spider mites. They thrive in dry indoor air and reproduce rapidly. Rinse the plant under a strong shower, then treat every 5–7 days with insecticidal soap or a neem-oil spray until you have seen no fresh webbing for two weeks.
Pet safety
Which houseplants are safe for cats and dogs?
Spider plants, Boston ferns, calatheas, parlour palms, areca palms, peperomias, African violets, hoyas and most true ferns are non-toxic to cats and dogs according to the ASPCA. Common toxic plants to avoid include peace lilies, philodendrons, pothos, sansevieria, monstera, ZZ plants and any true lily. See our full pet-safe houseplants list.
My pet ate part of a houseplant — what should I do?
Identify the plant, then call your veterinarian or a pet-poison hotline immediately, even if symptoms have not appeared yet. True lilies are a medical emergency for cats and can cause kidney failure within hours. For mildly irritating plants like pothos and philodendrons, watch for drooling, vomiting and reduced appetite and consult your vet if anything escalates.
Buying & getting started
What is the easiest houseplant for a complete beginner?
Pothos, snake plant (Sansevieria), ZZ plant, spider plant and heart-leaf philodendron are the most forgiving choices. They tolerate inconsistent watering, low light and dry air, and they recover well from mistakes — ideal for building confidence. Our complete ranking is in 15 best beginner houseplants.
How do I look after a brand-new houseplant the first week?
Resist the urge to immediately repot or fertilize. Put the plant in a bright spot away from direct sun and heat sources, water only if the soil feels dry, and let it acclimatise for two to four weeks. A little leaf yellowing or one or two dropped leaves is normal as the plant adjusts to a new environment.
Travel & absence
How long can houseplants survive without water?
Most established houseplants can comfortably go 10–14 days between waterings if soaked thoroughly before you leave and moved out of direct sun. Drought-tolerant species like snake plants and ZZ plants can stretch to 3–4 weeks. Tropicals like calatheas and ferns need a self-watering system or a plant-sitter for trips beyond a week. The full prep checklist is in how to care for houseplants while on vacation.
Last updated: June 2026. Have a question we should add? Send it to us.