Do you need to water Phalaenopsis orchids grown in sphagnum moss often, and will they die if it is too wet?

After many friends started growing Phalaenopsis orchids in sphagnum moss, they kept wondering: for Phalaenopsis grown in sphagnum moss, how often exactly should you water? If the sphagnum moss stays wet all the time, will the Phalaenopsis drown?

When growing Phalaenopsis in sphagnum moss, you cannot just water whenever you feel like it, based on your mood; the Phalaenopsis really cannot take it! Sphagnum moss has extremely strong water absorption and can soak up a lot of water. But the roots of Phalaenopsis are different from those of the plants we commonly see; they are aerial roots and like a breathable environment. If the sphagnum moss stays soaked in water all the time, the roots will be like a person shut in a tiny dark room with no windows, unable to breathe, and over time they will rot, and the whole Phalaenopsis will suffer along with them.

So for Phalaenopsis grown in sphagnum moss, how often exactly should you water? It depends on the specific situation! First, it depends on temperature and humidity. In summer, when the weather is hot and water evaporates quickly, if indoor ventilation is good, you may need to water every 3 - 5 days; but in winter, when the temperature is low and water evaporates slowly, watering once every 10 - 15 days is also normal. Besides the season, you also need to look at the condition of the sphagnum moss. Before each watering, pull apart the surface layer of sphagnum moss and feel it with your hand. If the sphagnum moss still feels damp, do not water yet; if the sphagnum moss has already dried out and become hard, and crumbles a little when gently pinched, then it is time to add water.

Some people may ask: "If I water a little less each time and keep the sphagnum moss constantly moist, that should be fine, right?" Actually, no! Sphagnum moss that is too wet will breed all kinds of bacteria and fungi. For example, the common root rot occurs because the sphagnum moss stays wet for a long time, pathogens multiply in large numbers, and they attack the root system of the Phalaenopsis. At first, maybe only the root tips turn black, and if not dealt with in time, the whole root rots, the leaves also turn yellow and soft, and finally the whole plant withers. Even if it does not get diseased, an environment that is too wet will make the roots of the Phalaenopsis fragile and lower their resistance.

The correct watering method should be "water thoroughly, then drain." Find a large basin, fill it with water, put the Phalaenopsis together with its pot and sphagnum moss into it, and let the sphagnum moss absorb water fully, soaking for about 15 - 20 minutes, then take it out and drain off the excess water. This way you can ensure the Phalaenopsis drinks its fill without water accumulating. If you are worried about not getting the watering frequency right, you can also buy a soil moisture meter, insert it into the pot, and water again only when the reading shows it is almost dry.

When growing Phalaenopsis in sphagnum moss, watering is truly a technical skill. Never take the easy way out and water too much; observe more and judge often, keep the sphagnum moss moderately moist and dry, and only then can the Phalaenopsis grow sturdy, big white roots and bloom with beautiful large flowers.