root pruning & strange leaves

[topshelf12]

 I root pruned about 5 of my hibs about 2 months ago. All are recovering nicely except for Creole Lady. Is has plenty of new growth but when the leaves get full size they curl and twist and turn yellow. This is my only hib that does this. any idea what is going on?
thanks
Norm

[Charlie]

Haven't seen leaves do this before. Stumped at the moment -  standard possibilities are insects, diseases, or nutrient imbalances. About all I can think to suggest is to use a conservative nutrient program, closely examine the leaves with a magnifier, and continue to watch it. Sometimes problems with hibiscus just sort themselves out over time and as conditions change.

Charlie