Question From: Fremont, California, United States
Q: The new growth leaves on my geranium/pelargonium are very pale yellow to white. I have grown them for over 15 years, never had this problem. They are still flowering, just new leaves look sick.
My guess is excessive heat. They just can't take it. Best And Happy Yardening, Nancy
Comment: I live close to the bay, we don't get excessive heat. Plus, the plants are on the east side of the house. Must be a different answer.
Take samples of the damaged leaves to your local independent garden center or nursery that grows these plants of an accurate ID and control. Best And Happy Yardening, Nancy