did you fertilize them?

I bought these for my daughter and she has used the granular fertilizer and has watered as well. They are exposed to sufficient sun practically all day. I my estimation (I also have two year old Hibiscus which have done well) they look sick sick. Any further advice would be greatly appreciated.

it looks like fertilizer burn to me - which is why i asked. the affected leaves will stay that way and eventually die off - watch the new growth and see if it continues. (don't forget to check for bugs under the leaves and around new growth)