Dear Alex,

as you said, ilex bonsai is very resistant to frost, in any case I recommend that you keep it in a sunny area in winter, and if the pot is very small, cover it with non-woven fabric, in order to avoid all the earth being exposed to frost, with obvious danger for the roots. It is a beautiful hardy plant, with minute foliage, so it does not require special care. It is repotted at the end of winter, every 2-3 years, with cutting of the redices; in spring it is fertilized with a special product for bonsai, and for the whole vegetative season the shoots are topped. Watering is regular, from March to October; in the cold season water sporadically, avoiding leaving the soil completely dry for long periods of time, especially if the climate is mild.