Green Leaves Falling Off Rose Bushes—Stress, Water, or Spray?

Green leaf drop = stress response. Causes:

• Sudden heat — roots shut down, shed leaves to survive.
• Water not reaching deep roots — dig to check penetration.
• Recent spray (fungicide/insecticide) — phytotoxicity.

Identify cause; correct watering; stop sprays; mulch. New leaves will follow.