Saving a Declining Natal Plum After Landscaping Disturbance

Diagnosing the Decline

Natal plum (Carissa macrocarpa) turning yellow and dying after landscaping likely suffers from root damage during digging and excessive rain in New Orleans. The combination compromises root function, leading to nutrient uptake failure and root rot.

Immediate Steps

1. Stop all fertilization until recovery.
2. Improve drainage: aerate soil around the root zone with a fork.
3. Apply a fungicide drench (e.g., phosphorous acid) to combat potential Phytophthora.
4. Mulch with 2 inches of pine bark to moderate soil moisture.

Long-Term Outlook

If the cambium layer (under bark) is green, the plant can recover once rain subsides. New growth may take months. Avoid further disturbance. Natal plum is tough but resents root disruption.