When I google "pink lady plant" there are a lot of different plants showing up. perhaps you can take a picture or be more specific in the type of plant you're asking about?
oh, indian hawthorn...ok, well if you do a search on tortoisetable for Rosaceae, you come up w/a lot of 'feed in moderation' and some 'do not feed's as well. probably safer to avoid it unless you can find some more specific information