What kind of fertilizer is suitable for orchid planting?

It is best to use tiles at the bottom of the flowerpot to facilitate the removal of accumulated water. The flower soil can refer to the following formula: 50% of decayed leaf soil, 15% of coarse sand, 20% of charcoal rubble, 15% of ripe fertilizer (try to avoid direct contact with flower roots). Every 15 - 20 days, apply a fully fermented fertilizer water or rice washing water, etc., you can buy special fertilizer to apply, but it is best not to use chemical fertilizer.