How to Care for an Orchid

Written & researched by Elena Marsh Gardening & Landscaping Editor

Updated June 2026

To care for an orchid, water it thoroughly once every 7 to 10 days when the roots turn silvery, give it bright indirect light, keep it between 65 and 80 F, and feed it a dilute balanced fertilizer during active growth. The moth orchid (Phalaenopsis) that fills grocery store displays is genuinely one of the easiest flowering houseplants to keep alive — the trouble is that almost everything about it runs opposite to normal plant care. It grows in bark, not soil, its roots need air, and overwatering kills far more orchids than neglect ever will.

This guide covers the moth orchid specifically, because it is what you almost certainly own, with notes on other common types where they differ. Our care advice reflects the consensus of university extension services and long-time growers rather than first-hand trials; where we recommend a product we explain how we reach a pick in how we rank.

Getting an orchid's light right

Light is the first thing to fix, because it drives both leaf health and whether the plant ever blooms again. A moth orchid wants bright, indirect light — the kind an east-facing windowsill gives all morning, or a spot a few feet back from a south or west window where direct sun does not fall on the leaves.

The leaves tell you if you have it right. A well-lit orchid has bright, medium-green leaves. Dark, lush green leaves look healthy but actually mean too little light, and that plant will rarely rebloom. Leaves that turn yellowish, red-tinged or develop bleached patches are getting too much direct sun and can scorch. Aim for that medium grassy green.

If your brightest window still is not enough — common in northern-facing rooms or through a dim winter — a small LED grow light on a timer solves it cleanly. See how much light do houseplants need for reading light levels, and the ranked field in best grow lights for indoor plants.

Watering an orchid without drowning it

Overwatering is the number one cause of orchid death. The plant grows in chunky bark precisely so its roots can breathe between waterings, and roots kept constantly wet rot and turn to mush.

The reliable method is to water by the state of the roots and the weight of the pot, not by a schedule:

1. Check the roots. Healthy hydrated roots are plump and green; when they are ready for water they turn silvery-gray. A clear plastic inner pot, which most orchids come in, lets you see this at a glance.
2. Water thoroughly. Take the plant to the sink and run room-temperature water through the bark for 15 to 30 seconds until it drains freely from the bottom. This wets the whole root mass, not just the surface.
3. Let it drain completely. Never leave the pot sitting in a saucer of water or inside a decorative cachepot with water pooled at the bottom. Standing water is what rots roots.
4. Wait until it is light and the roots silver again before repeating — usually 7 to 10 days indoors, longer in winter.

Skip the myth that you should never let water touch the leaves. Water sitting in the crown (the center where new leaves emerge) overnight can cause crown rot, so if the crown gets wet, blot it dry — but a wet leaf itself is harmless. For the broader principle across all your plants, see how often to water houseplants.

The ice-cube method, honestly assessed

The "three ice cubes a week" instruction printed on supermarket orchids works better than its critics claim. A widely cited study run by the University of Georgia and Ohio State University compared ice-cube watering to conventional watering on hundreds of Phalaenopsis over several months and found no meaningful difference in bloom life, leaf health or root health, with no cold damage to roots in their setup.

The reason it works is behavioral more than horticultural: three ice cubes deliver a small, fixed dose of water — roughly a quarter cup — which is hard to overdo, so it prevents the overwatering that kills most orchids. The legitimate concern is that orchids are tropical and melting ice chills the root zone; a minority of growers report damage where a cube sits directly against a root. If you like the convenience, keep the cubes off the crown and off the thickest roots. If you would rather not gamble, room-temperature water through the pot is gentler and takes the same 30 seconds.

Potting mix and repotting

Orchids are not potted in soil. Potting soil suffocates their roots. The standard medium is a coarse mix of fir bark, sometimes blended with sphagnum moss, perlite, charcoal or coconut husk, which holds a little moisture while leaving big air gaps.

Repot every one to two years, because bark breaks down over time into a dense, water-holding mush that starts to smother the roots — the same problem as soil. The best time is right after flowering, when new roots are emerging. Steps:

1. Slide the plant out and gently shake off the old bark.
2. Trim off any dead roots (mushy brown, or dry and hollow) with sterilized scissors, keeping all the firm green and silvery ones.
3. Choose a pot only slightly larger, ideally a clear plastic pot with plenty of drainage holes, which lets light reach the roots and lets you monitor moisture.
4. Settle the roots in and pack fresh bark around them, firming lightly. The base of the lowest leaves should sit at the top of the mix.
5. Wait a few days before watering to let any trimmed roots seal over.

For general repotting technique across your collection, see how to repot a houseplant.

Feeding for growth and blooms

The old grower's rule is "weakly, weekly": a balanced water-soluble orchid fertilizer diluted to about a quarter or half the label strength, applied roughly every week or two during active growth in spring and summer. Bark-based mixes hold few nutrients, so light regular feeding matters more for orchids than for soil-grown plants.

Cut back feeding in late fall and winter when growth slows. Flush the pot with plain water every month or so to wash out accumulated fertilizer salts, which otherwise build up and burn the root tips. A dedicated orchid fertilizer keeps the ratios sensible; the general options are covered in best fertilizer for orchids and best indoor plant fertilizer.

Temperature, humidity and airflow

Moth orchids are comfortable in the same range people are: roughly 65 to 80 F during the day. They appreciate humidity of 40 to 60 percent, which is higher than most heated or air-conditioned homes provide in winter. A pebble tray under the pot or a nearby humidifier raises local humidity; grouping plants together also helps. Gentle air movement discourages the fungal spots that thrive in still, damp air, so a room that gets a little circulation is better than a sealed corner.

The temperature detail that unlocks reblooming: most Phalaenopsis need a stretch of cooler nights — around 55 to 65 F for two to four weeks in the fall — to trigger a new flower spike. A windowsill that cools at night in autumn often does this naturally.

Getting it to rebloom

A healthy moth orchid reblooms about once a year, and reluctance almost always traces back to light or the missing cool-night trigger. To coax a new spike:

• Maximize light through the growing season so the plant banks the energy a spike demands.
• Give cool fall nights of 55 to 65 F for a few weeks.
• Keep feeding weakly so it has the nutrients to build the spike.
• Be patient — a spike can take two to four months to emerge and open.

When the current blooms drop, decide by spike color: a still-green Phalaenopsis spike can be cut just above a lower node to encourage a branch and a second flush, while a yellowing or browning spike should be removed at the base so the plant reinvests in roots and leaves.

Common orchid care problems and fixes

Yellow leaves get their own diagnostic in yellow leaves on houseplants, and if you have already gone too far the other way, how do you save an overwatered plant walks through the rescue. Everything else lives at the houseplants and indoor greenery hub.