Philodendron

The other great beginner houseplant, and the one pothos is constantly mistaken for. Several hundred species, one shared rule: nothing on a philodendron is food, and a chewed leaf fires oxalate needles into the mouth within seconds.

Bright indirect light, a chunky free-draining mix, and water when the top inch or two is dry. Includes the one-second test that separates philodendron from pothos: watch how a new leaf comes out.

Light. Bright indirect — a few feet back from a window, or beside a north-facing one. Direct sun scorches the leaves within days. A philodendron will live in a dim corner, but it lives there rather than grows: the vines stretch, the gaps between leaves get long, and each new leaf comes out smaller than the one before it. If the newest leaf is the smallest leaf, move the plant brighter.

Mix. These are epiphytes and semi-epiphytes whose roots run through leaf litter and up tree bark, so they want air around the roots. Ordinary potting mix is fine on its own and much better with a couple of handfuls of orchid bark, perlite or coco chips stirred through. Always a pot with drainage holes; never a decorative cachepot with water standing in the bottom.

Water. When the top inch or two is dry, water until it runs out of the base, then empty the saucer. That is a little more often than a pothos and far less often than most people assume. Philodendrons droop dramatically when genuinely thirsty and stand back up within hours of a drink, so the plant tells you before there is any harm done.

Support. The name means tree-loving, from the Greek phileo and dendron, and it is a growing instruction. Give a climbing philodendron a damp moss pole and every new leaf comes out bigger than the last, because the plant reads the support as a tree trunk and shifts into its adult form. Left trailing from a basket it stays in the small juvenile leaf forever — which is a perfectly good look, just a different one.

Telling philodendron from pothos. The reliable test is how a new leaf emerges. A philodendron unfurls each one from a papery sheath called a cataphyll, which dries brown and drops, leaving little brown papers under the plant; pothos has no sheath at all — the new leaf simply pushes out of the base of the one before it. Two backups: run a finger along the leaf stalk, and a philodendron petiole is round in section where a pothos has a distinct groove down the top; and philodendron leaves are thinner, softer and evenly symmetrical, where pothos leaves are thicker, waxier and slightly lopsided at the notch.

Do not plant it outdoors in a frost-free climate. In south Florida, Hawaii and Puerto Rico, escaped philodendrons climb trees and carpet hammock floors. Keep it in a pot there, and put cuttings and old mix in the trash rather than the yard or the green-waste bin.

Prune it so it stays full rather than stringy, wear gloves when you cut it, keep the aerial roots, and hang it high enough that the chewable end is out of reach.

Most philodendron care is pruning. Left alone the vines run long and drop their older leaves, and you end up with bare stems and a tuft at the far end. Cut a vine back to just above a leaf joint and the plant branches from behind the cut; two or three cuts a year is the whole difference between a full plant and a stringy one. Always wear gloves — the cut ends weep sap that stings skin and is genuinely dangerous in an eye — and wash your hands afterwards.

Leave the aerial roots. Those stubby brown nubs opposite each leaf are not damage and not a pest. In the wild they grip bark and draw in moisture, and on a moss pole they will do the same. Tuck them into the pole or the pot rather than cutting them off; if one is genuinely in the way, removing it does no harm, but a plant stripped of all of them climbs badly.

Repot every couple of years, or when roots circle the pot and water runs straight through — one pot size up, no more, in spring or summer. Wipe the leaves with a damp cloth every month or two; dust genuinely reduces the light the plant can use, and a clean philodendron is a noticeably glossier one. Turn the pot a quarter each time you water so it grows evenly rather than leaning at the window.

The care decision that matters most has nothing to do with horticulture: where you put it. A trailing philodendron on a low shelf puts the softest, most chewable growing tip at exactly cat height, and dangling vines are irresistible to cats. Wall brackets, high shelves and hanging hooks solve this completely. If you have an animal that grazes plants regardless of consequence, keep philodendron out of that room — it is not worth an argument you cannot win.

A chewed leaf comes first - call a vet or poison control right away rather than waiting for symptoms. Beyond that, almost every philodendron problem is too much water or too little light.

A pet or a child has chewed a leaf. Call your veterinarian, an animal poison line, or poison control now — do not wait to see how it develops. Rinse the mouth out with water, take the plant or a piece of it with you if you go in, and follow whatever advice you are given. Go to an emergency clinic or emergency room immediately if drooling will not stop, if there is retching or an inability to swallow, or if there is any change in breathing or in the voice. The pain is instant and usually settles within a few hours; swelling is what makes the rare case serious.

Yellow leaves, starting at the bottom, mix always damp. Overwatering, and the start of root rot. Let the mix dry properly, water less, and check that the pot actually drains and is not standing in a full saucer. One yellow leaf at the base of an otherwise healthy plant is just an old leaf being retired.

Black mushy stems at the soil line, plant collapsing. Root rot. Tip it out, cut away every soft brown root, and either repot the sound remainder in fresh dry mix or — usually more reliable — take clean cuttings from the healthy vines and start again.

Long bare vines with small leaves. Too little light. Move it somewhere brighter but still out of direct sun, and cut the leggy vines back hard; it regrows dense in the better position.

Brown crispy tips and edges. Dry indoor air, fertilizer salts accumulated in the pot, or repeatedly letting it go bone dry. Flush the pot through with plenty of plain water, ease off feeding, and water a little sooner.

My Pink Princess is coming out all green (or all pink). Normal, and manageable. The pink is a chimera and every plant drifts. Cut back to a node that has pink on it to push the variegation back; a fully pink leaf has no chlorophyll, cannot feed itself, and will eventually kill the vine it is on, so prune those out too.

Silvery scarring, black specks, distorted new leaves. Thrips — the pest that most often ruins a good philodendron. See Threats; it takes a month of repeat treatment, not one spray.

Nothing is happening. If it is December, that is correct. Philodendrons nearly stop over winter and start again in March.

Cut just below a node, root it in water or straight into mix, and pot it up before the water roots get long. A leaf without a node will never become a plant.

Trailing philodendrons are among the easiest plants in the house to multiply. Cut a vine into pieces so that each piece has at least one node — the slightly swollen joint where a leaf meets the stem, usually with a small brown aerial-root nub beside it. That nub is where the new roots come from; a cutting with a beautiful leaf and no node will sit in the glass for months and never root. Cut about half an inch below the node and remove the lowest leaf so it does not sit in water.

In water: stand the cuttings in a glass with the nodes covered and the leaves clear, somewhere bright, and change the water weekly. Roots appear in one to three weeks. Pot them up when the roots are one to two inches long. This matters — water roots are thin and brittle and adapt badly to soil, so a jar left for months usually sulks for weeks after potting.

In mix: push three or four cuttings around the edge of a small pot of damp, chunky potting mix, keep it lightly moist and somewhere warm, and they root just as well with no transition to make. This is the better method if you want a full pot quickly.

Self-heading types — the tree philodendrons and Birkin-style plants that make a trunk rather than a vine — are propagated by division or by cutting off and rooting an offset, not by taking a leaf.

Wear gloves for all of it, keep the trimmings off kitchen counters and away from pets while you work, and if you live somewhere frost-free put spent cuttings in the trash rather than the compost or the green-waste bin.

A houseplant in every US climate. Outdoors it survives only in zone 10b and warmer - and that is exactly where several species have escaped and need containing.

Indoors, climate barely matters: philodendrons want what a heated house already provides — 65 to 85°F, out of drafts, and away from freezing windowpanes in January. They sulk below about 55°F and are killed outright by frost. Dry winter air produces brown leaf tips but does not threaten the plant; a pebble tray or a room humidifier helps if you care about perfect edges, and grouping plants together does a surprising amount on its own.

Outdoors they are hardy only in zone 10b and warmer — the southern tip of Florida, Hawaii, coastal Puerto Rico, the warmest edge of the Gulf. In those places they can be grown as shade groundcover or trained up a trunk, and in those places they also need watching. Several philodendrons have escaped cultivation in south Florida and Hawaii, climbing native trees and carpeting hammock floors, and the tree philodendrons seed themselves readily in warm wet ground.

The practical rule for warm-climate gardeners: keep it in a pot, keep the pot off the ground where a stem can root into a bed, and put trimmings and old mix in the trash. A single node in warm damp ground is a new plant.

Summering outdoors anywhere else is fine and does the plant good: move it into full shade once nights stay above 60°F, never into sun, and bring it back inside in early autumn well before the first cold night — checking the undersides of the leaves for hitchhiking pests before it rejoins the other plants.

A tree-loving rainforest genus that became a mid-century interior staple, lost its biggest species to a new genus in 2018, and briefly turned into a speculative market.

The name is a growing instruction in Greek: phileo, to love, and dendron, tree. These are plants of the tropical American rainforest that germinate on the floor, find a trunk, and climb it — some of them abandoning their connection to the ground entirely once they are up. That is why a philodendron on a moss pole behaves so differently from one in a hanging basket.

Europeans began collecting them in the nineteenth century, and heartleaf philodendron became a staple of the Victorian parlour for the same reason it is a staple of the modern office: it tolerates low light, dry air and inattention. The mid-twentieth century made it ubiquitous. Cheap air freight, central heating and modernist interiors that wanted large green foliage put philodendrons into lobbies, offices and living rooms across America, and the big selloum types became the definitive 1970s plant.

Two more recent changes are worth knowing because they explain confusing labels. In 2018 the large self-heading tree philodendrons were moved into a separate genus, Thaumatophyllum, so the plant sold for decades as Philodendron selloum or P. bipinnatifidum is now Thaumatophyllum bipinnatifidum. Nurseries still say philodendron, and culturally it makes no difference.

And between roughly 2018 and 2022 rare philodendrons became a speculative market. Single rooted cuttings of Pink Princess and variegated forms changed hands for hundreds or thousands of dollars before tissue culture caught up and prices collapsed. If you are buying one now, buy it because you like the leaf.