Can orchids be watered with urea? The correct application method

Orchids are a fairly common flowering plant with fleshy roots, and they have certain requirements for soil, water and nutrients. Especially when it comes to nutrients, an unsuitable fertilizing method can easily have a negative effect on the fleshy roots of orchids.

Urea is a common fertilizer in agricultural production; its main component is carbamide, with a content of 46%, and it is easily soluble in water. As for orchids, urea can also be applied to promote their growth. The simplest way is to take a small amount of granular urea and bury it in the surface layer of the potting soil, about a few granules or a dozen granules is enough. Be careful to water thoroughly, and it must not be applied frequently. The biggest drawback of this method is that as the urea dissolves in water, some areas end up with a high fertilizer concentration, which can easily cause reverse osmosis in the roots, thereby affecting the roots or even causing root rot.

I still recommend dissolving the urea in water first and then watering with it. This way, the urea solution has a low concentration and spreads evenly, so it will not have a negative effect on the roots, and there will be no reverse osmosis caused by high concentration in localized areas.

There is another method, which is foliar spraying. This method gives a quick fertilizer response, but it easily causes fertilizer burn to the leaves. It is recommended to keep the concentration at around 0.5%, and the frequency of application should still be controlled. Also, try not to spray it on the flower buds.