Soins des orchidées 101 : lumière, eau, terreau et nourriture
Caring for an orchid comes down to four things: getting the light right, watering correctly (always under-watering, never over-watering), using a soilless bark-based mix instead of regular potting soil, and feeding lightly with orchid-specific fertilizer. Master those four and a Phalaenopsis can live and rebloom for 5+ years. The #1 killer of houseplant orchids is overwatering combined with the wrong soil. Fix that, and most other "problems" disappear.
The single most important step: if you bought your orchid in regular potting soil, repot it into Molly's Orchid Mix as soon as the current bloom finishes. This one change prevents the majority of orchid deaths.
Light: how to read your orchid's leaves
Orchids communicate their light status through leaf color. You don't need a light meter; just look at the leaves.
Healthy: medium green leaves with a slight yellowish tinge. The plant is in adequate-to-good light.
Too much light: dark red, purple, or yellow patches; bleached white spots. Move further from the window or add a sheer curtain.
Too little light: very dark green leaves, no blooms despite healthy growth. Move closer to the window.
For Phalaenopsis (the most common houseplant orchid), an east or west window with no direct midday sun is ideal. South-facing works with a sheer curtain. North-facing is too dim for blooming.
Water: how Molly's Orchid Mix changes the routine
Forget the "ice cube once a week" trick. Orchids in nature get drenched by tropical rain then dry out completely in the breeze. Replicate that.
Molly's Orchid Mix generally requires watering every 1 to 2 weeks, depending on the plant and your local environment. Because the mix is designed to drain quickly (over-watering is harder to recover from than under-watering), the trick is making sure water actually saturates the entire mix instead of channeling through and draining out the bottom.
Method 1: Top watering (most common)
- Take the orchid (in its grow pot) to the sink.
- Pour water onto the mix until it pools on top before soaking in. Tilt the pot slightly to spread evenly. Continue until water drains freely from the bottom.
- Drain completely. Don't let the pot sit in standing water.
Method 2: Bottom watering (recommended periodically)
- Place the pot in a small saucer or bowl with 1 to 2 inches of water.
- Let the pot soak for 30 to 60 minutes. Water wicks up through the drainage hole, fully rehydrating the bark and the roots.
- Remove and let drain.
Bottom watering once every 4 to 6 watering cycles is a Veryplants-recommended practice. It ensures the mix is fully rehydrated and encourages strong downward root growth.
How to know when to water: stick a finger into the bark mix. If it feels even slightly damp, wait. If it's completely dry to the touch, water. The clear pots that come with most orchids let you see the roots: green roots mean hydrated, silver-grey roots mean ready to water.
What kills orchids: sitting in water. Never let the pot sit in a saucer of standing water (different from the timed bottom-watering method above, where you actively drain after 30 to 60 minutes).
Soil: why bagged "orchid soil" from Home Depot will eventually kill your orchid
Orchid roots need air. They evolved on tree bark, not in dirt. Most "orchid bark" or "orchid soil" products at big-box garden centers are too fine, too peat-heavy, or include components that compact and trap moisture.
What you want: chunky bark (5-15mm pieces), perlite for drainage and aeration, and ideally horticultural charcoal to absorb impurities. No peat, no compost, no soil ingredients.
Molly's Orchid Mix is formulated to these specs. If you'd rather DIY, look for "orchid bark medium grade" plus perlite plus optional charcoal.
Food: why your mix is not your fertilizer
An important distinction: a potting mix is structural, not nutritional. Molly's Orchid Mix contains some nutrients (released slowly as the bark and other components break down), but it is not a substitute for a dedicated orchid fertilizer. You'll want to feed your orchid in addition to using a quality mix.
Orchids are light feeders. Over-fertilizing burns the roots faster than under-fertilizing harms growth.
What to use: a balanced orchid-specific fertilizer (look for 20-20-20 or similar NPK ratios labeled for orchids). Generic houseplant fertilizer is too strong.
How often: "weekly, weakly" — quarter strength, every week during growth. Skip fertilizing for 2 to 3 weeks every couple months to flush salts. No fertilizing during dormancy (most orchids: October through February).
How to apply: mix into your watering routine. Skip every 4th watering and use plain water to flush.
Repotting: when and how
Repot every 1-2 years, ideally right after a bloom cycle. Signs you need to repot:
- Bark looks dark, soft, and decomposed (no longer chunky)
- Roots are growing out of the pot in tangled masses
- The mix smells musty
- Water doesn't drain through quickly
For step-by-step repotting instructions, see our complete guide on choosing the best orchid potting mix.
Common problems and what they mean
Yellow leaves: usually overwatering or old/decomposed bark. Check the roots — mushy means rot, repot immediately.
Wrinkled leaves: dehydration or root damage. If roots look healthy, water more often. If roots look mushy, the plant can't absorb water and is rotting.
No blooms: insufficient light, no temperature drop at night, or the plant is recovering from stress. Move to brighter spot, ensure 10-15°F night-day temperature differential.
Aerial roots growing out of the pot: normal! Don't try to bury them. They absorb humidity from the air.
Brown spotting on leaves: fungal or bacterial infection. Improve air circulation, reduce leaf wetness during watering.
Frequently asked questions
How often should I water my orchid?
Every 1 to 2 weeks for Phalaenopsis in Molly's Orchid Mix, depending on the plant and your local environment. Always let the bark dry completely between waterings.
Can I leave my orchid in the bathroom for humidity?
Yes if there's enough light. Orchids enjoy bathroom humidity but most bathrooms are too dim. East-facing bathroom window: great. Windowless bathroom: bad.
My orchid has roots growing everywhere — should I cut them?
No. Aerial roots are healthy and natural. They absorb humidity from the air. Trim only roots that are clearly dead (mushy, hollow, brown).
How do I get my orchid to rebloom?
Two things trigger reblooming: enough light (often the limiting factor) and a temperature drop at night (10-15°F lower than daytime). Move to a brighter spot or near a window where night temperatures drop.
Is it true I should water orchids with ice cubes?
It works because it slowly releases water and prevents overwatering, but it's not optimal. Ice is colder than tropical orchids ever experience. Better: water properly with the soak-and-drain method less often.
Should I mist my orchid?
Not really. Misting raises humidity briefly but also wets the leaves, which can cause fungal spotting. A humidifier or a pebble tray works better.
Set your orchid up for success from day one.
Repot in a pre-blended bark mix designed for the most common indoor orchids.
