Hi Joan,

Croton Mammy Plant

Crotons tend to lose leaves when they are severely over-watered or under-watered. It looks like your Croton is in a container that does not have drip holes in the bottom ?? Is that true? If the answer is yes, the plant is probably over-watered. All houseplants should be in pots that have drip holes. You can then set them in a clear deep plant saucer and then place plant & saucer into a decorative container. If you don’t think it’s a watering issue, the other cause may be spider mitesLearn how to identify and treat the plant pest called Spider Mites.. You can read about spider mitesLearn how to identify and treat the plant pest called Spider Mites. and how to treat them in the Glossary of the website.

http://www.houseplant411.com/glossary/spider-mite-plant-pests