Diagnosing Yellow Top Leaves on Transplanted Tomatoes

Half-yellow new leaves days after transplanting in Florida suggests transplant shock or sudden light exposure change — not cold (your zone 9/10 is fine).

Likely Causes

• Abrupt move from indoor to outdoor light intensity
• Overwatering in well-draining containers
• Lime/fertilizer placement near roots

Response

Give plants time to acclimate — they typically recover. Ensure gradual hardening off next time. The symptom affecting only newest growth is classic adjustment stress, not disease or nutrient deficiency.