Why do orchids become scorched?

The causes and treatment methods of the focal tip of orchids:

Improper use of ① culture soil. Orchids like acid loose, permeable soil, the bottom of the basin needs to be covered with 3-5 cm thick stone grains to facilitate ventilation and water penetration. Too wet pot soil is a big taboo in orchid maintenance.

Improper fertilization of ②. It is not necessary to apply fertilizer for planting in that year, thin fertilizer is needed in the vigorous growth period of the second year, and phosphate fertilizer is mainly applied; it is not allowed to apply fertilizer in hot summer and before flowering.

③ was watered improperly. Avoid too much or too little watering.

Improper daylighting in ④. Avoid strong sunlight.