The GARDENA gardening expert
Dear Ms. K., if the leaves of your camellias are rolling up, this indicates that your plants are not getting enough water, as rolling up the leaf is a mechanism by the plant to prevent evaporation. The camellias must now be kept slightly damp (never wet) using low-lime water at room temperature.
That means: Do not water excessively at any one time, and then leave the plants without water for extended periods. The drying effect can also be incurred through excessive temperature differences between the leaves and roots. If the plant is standing in its pot on a floor which is colder than the ambient temperature, then the roots will provide less water than the leaves evaporate – and the leaves will roll up.
Therefore, please ensure that the “head” and “feet” of the camellia are kept at the same temperature. A very well-lit winter storage location is suitable for camellias, with temperatures from around 0 to 10 °C, maximum 14 °C. A piece of insulation plate or a plant trolley is sufficient to remove the pot from the ground.
You were entirely correct to stop fertilisation. You can start to fertilise again after the flowering period, when the plant comes into bud.