In winter, most cacti and other succulents should be given a rest period. They can then be kept in a cool place (bedroom, stairwell, cellar) in dry soil. The more light available to them, the better. Use cactus soil and cactus fertiliser according to the instructions. From spring to summer, you can fertilise with cactus fertiliser or succulent fertiliser, depending on the species. Start in March without fertiliser by over-watering, then water. Fertiliser should only be applied at the next watering. An adequate supply of plant food is crucial for health and important for flowering the following year. Diseases often occur as a result of malnutrition.