What kind of fertilizer is suitable for growing orchids?

It is best to line the bottom of the flower pot with tile pieces, which helps with drainage. For the potting soil, you can refer to the following formula: leaf mold 50 percent, coarse sand 15 percent, charcoal and rubble 20 percent, rotted fertilizer 15 percent (rotted fertilizer should be kept from direct contact with the orchid roots as much as possible). Every 15 to 20 days, apply fully fermented fertilizer water or rice water, etc. You can buy special fertilizer to apply, but it is best not to use chemical fertilizers.