Posted: 09/05/2012 at 22:05
If it is in a pot you can certainly feed it, preferably with a foliar fertilizer, although the fresh compost should have made a difference. Other than that, keep it moist and make sure it is in a sheltered, sunny position to give it the best chance.
A thought - did you examine the roots while re-potting? Did they look healthy? And no sign of any grubs such as vine weevil?