Why do roses lose their leaves and turn yellow?

1. Reasons for leaf drop

1. Disease invasion: When roses are attacked by powdery mildew and leaf spot, not only will the leaves turn yellow, but they will also fall off. Attention should be paid to spraying the pesticide in time and using the medicine regularly.

2. Hot and stuffy environment: If the plant stays in a dark, stuffy environment for a long time, its growth condition will deteriorate and the leaves will fall off after a long time. It is also easy to breed bacteria, so the ventilation of the breeding environment should be improved.

2. Reasons for yellowing leaves

1. Improper watering: If you water the rose too much, its roots will be soaked in water and rot, and then its leaves will turn yellow and dull. Lack of water will cause its leaves to turn yellow and the edges of the leaves to dry out. Watering should be done reasonably. There should not be excess water in the flowerpot, and it should not be too dry. Try to keep it slightly moist.

2. Improper fertilization: When fertilizing, if you use uncomposted fertilizer or fertilizer with too high concentration, its roots will be burned and its leaves will turn yellow. When applying fertilizer, it should be mature fertilizer and the concentration of the fertilizer should be low. It is best to dilute it before use.