Question From: Kingston, Ontario, Canada
Q: Rubber tree new leaves have mostly grey patches and are thinner and curled. I don't see anything that looks like bugs, after checking for pics and info on the internet. The leaves themselves (the new ones) are many shades lighter green and covered in grey patches. The old leaves are fine. Thank you, so much, in advance, for your help, Nancy!
Sounds like a fungal disease and may be caused from overwatering, Take samples of infected leaves to a good independent garden center that specializes in house plants for a more accurate Id and recommendation of control. Best And Happy Yardening, Nancy