The plants can be replanted at any time; however the optimum time to do this is in the  spring. Depending on the plants growth rate, the new pot should be slightly larger than the old one. When using clay pots, soak them in water beforehand.  Place fragments of crockery or ceramsite to enable drainage after watering. Put a thin layer of new soil over this drainage material and then match the plant with the old soil ball at an appropriate height in the pot. Fill the space between the soil ball and the pot with new soil. Leave 1-2 cm free space below the rim. After planting, the plant needs to  be watered thoroughly and protected from direct sunlight.  In order to avoid drying, it is advisable to cover the soil surface with a layer of ceramsite.