Don’t just pour water into your orchid’s pot while it’s in a cachepot: that can lead to rot. Photo: plantinstructions.com
There’s nothing particularly complicated about watering an orchid … but people still get it wrong. They’re much more likely to overwater than underwater and the consequences are worse: overwatering can lead to rot.
The problem is that orchids these days are almost always sold double-potted: there is a “grow pot” (often transparent) with numerous drainage holes set inside a cachepot without drainage holes. This actually makes watering especially easy, but you have to first understand how double-potting works.
You cannot just pour water onto the growing mix and walk away thinking you’ve done your job. Since there is no drainage possible from a cachepot, any excess water will simply build up, leaving the plant soaking in water, an open invitation to rot (rot is caused by any one of a number of bacterial, fungal and fungal like organisms).
To water your orchid, remove the grow pot from the cachepot and set it to soak for 10, 20, 30 minutes, even an hour, in a sink or bucket of tepid water. That will allow the roots to absorb the moisture they need. Next, let the pot drain well. That will take time, even 10 minutes or so. Then drop it back into the cachepot.
Congratulations! That’s how you water an orchid! And it couldn’t be simpler!
💡Helpful Hint: If possible, water your orchid in the morning. That way if you accidentally pour a little water on the leaves, it will have time to evaporate before nightfall. It’s best not leave water on orchid leaves at night… again, in order to prevent rot.
How Often Should I Water?
If you mean at what frequency do you need to water your orchid, that’s a tougher question.
The same orchid may dry out quickly under some conditions, yet stay moist for weeks in others. And conditions in your home change according to the seasons, the size of the plant, the size of the pot, etc. Yet you never want your orchid to become more than slightly dry.
So just touch the growing medium. If it feels moist, don’t water. If it feels dry, do water.
Wow! That was simple!
If you feel you can’t trust your finger (although I don’t know why you wouldn’t), you could use a moisture meter, readily available online and in most garden centers. However, I find they tend to give false results after a year or so’s use, especially if the water you use is hard. If you find your moisture meter claiming the growing mix is dry when your finger tells you it is clearly moist, get a new meter … or simply use your finger!
Watering orchids: so easy once you understand it!