I was brought a cameilla a couple of years ago and it has hardly grown. What can I do to make it grow
Shout loudly, that you will put it on the compost, if it doesn't get a move on.
have got it lime free soil and it is also important to water in autumn and in spring as feed also.
Autumn watering encourages flower bud formation. Use rain water only, or at least mostly.
I grow all mine in tubs. This is their 10th year or so and have just flowered best ever. Was it the hot summer plus watering?