In This Article
Few flowering houseplants are as beautiful as orchids—and few have as much of a reputation for being difficult to care for. However, many of common varieties are relatively simple to grow. Even beginning home gardeners can make them bloom and thrive.
There are thousands of orchid species and hybrids, but two types are typically sold as houseplants. Phalaenopsis hybrids, also known as moth orchids have wide leaves at the bottom, with long stems topped by pink, white, yellow, or purple blooms. Dendrobium hybrids, also called cane orchids, bear several flowers along leafy, upright canes.
Best Growing Conditions for Your Orchid Plant
Most orchids are epiphytes, meaning that in the wild, they grow on the woody surfaces of other plants. Like air plants, bromeliads, bird's nest ferns, and other epiphytes, they absorb nutrients and moisture from the air through their roots.
Use a growing medium specially formulated for orchids instead of regular potting soil, which can kill your plant. Pre-made orchid mixes are very well draining and typically include chunky ingredients like tree bark or lava rocks to create the air pockets the roots need to thrive.
Orchids grow best with bright, indirect light. Try siting your plant near a south-facing or east-facing window. Dark green leaves signal that you should move the plant closer to the window, while a medium green indicates adequate light.
While phalaenopsis orchids prefer warmer temperatures, others can withstand temperatures down to 50 or 60 degrees. Overall, though, orchids don’t do well at temperatures above 90 degrees and don't like cold drafts or blasts of heat.
How to Care for Your Orchid Plant
Plan to water once per week, checking the soil frequently until you have a good idea of your orchid’s water needs. Allow the growing medium to dry out somewhat between waterings.
Orchids grown indoors benefit from additional humidity. The best way to do this is to put a humidifying tray under your potted orchid plant.
Cover the bottom of a shallow tray with a layer of small pebbles, then add water to just below the tops of the pebbles. Place the plant on top, making sure that the bottom of the pot isn’t touching the surface of the water. The water will slowly evaporate, adding moisture to the air around your plant.
Using a clear plastic pot for your orchid can be helpful in monitoring soil moisture as well as root growth.
Fertilize orchids once per week with each watering using a balanced houseplant fertilizer diluted to quarter-strength. Cut back feedings to once per month during the fall and winter.
Plan to repot your orchid plant every three years or so, transferring it to a container one size larger. You may want to use an orchid pot to allow the roots to get more air. These pots have holes, slits, or other openings in the sides to allow better airflow to the plant’s roots.
How to Propagate Your Orchid Plant
The simplest way to propagate dendrobium orchids is to divide a mature plant into two smaller plants. Dendrobium orchids with at least four healthy canes can be divided.
Phalaenopsis orchids cannot be divided. They must be propagated by removing keiki, baby plants that can appear on a flower spike. To propagate orchids, you’ll need a healthy mother plant, two smaller plant pots, orchid mix, and sterilized garden shears.
How to Propagate Dendrobium Orchids
Step 1: Remove your orchid from its pot. Use your hands to gently loosen the roots and remove the growing medium.
Step 2: Using the shears, make a clean cut through the center of the rhizome. You will have to cut through some roots as well, but try to keep them intact as much as you can. Cut off any dead or dangling roots.
Step 3: Place the division in a new pot. Choose a pot with about an inch of space around the root ball so that the roots have somewhere to grow into.
Step 4: Fill the space around the root ball with fresh orchid bark or growing medium, pressing it down firmly with your hands. The spot where the root and stem meet should be covered by half an inch. Pack the medium tightly enough around the roots so that picking up the plant by its leaves also lifts the root ball and container. Repeat with the other division.
Step 5: Place divisions in a warm place with bright, indirect light. Water one week after dividing, then care for as usual.
How to Propagate Phalaenopsis Orchids
Look for keikis to grow from nodes on the flower stem of your phalaenopsis orchid. They will be small plants with their own roots and leaves. Dendrobium orchids may also grow keikis along or at the top of the cane; these can also be removed and replanted using this method.
Step 1: Allow the keiki on the mother plant to grow leaves and roots that are a few inches long.
Step 2: Using sterilized shears, cut the stem or cane a couple of inches above and below the spot where the keiki is growing. Apply a fungicide such as cinnamon to the cut areas to keep diseases from growing.
Step 3: Plant the keiki in a small pot using sphagnum moss, first putting some moss in the container and then wrapping moss around the keiki's roots.
Step 4: Keep the keiki in a spot with less light than you usually would for orchids, gradually moving it closer to a source of bright, indirect light. Once you see new growth, you can begin to fertilize and care for it as usual, eventually repotting with regular orchid mix. New orchid plants should begin to flower in two years or so with proper care.