Cacti and succulents thrive with good light sources, and it is best to place cacti and succulents in a bright place. A south facing position will provide good sunlight. However, be careful to not put them in direct sunlight because the intense light can make the plants turn a yellow colour. The optimum light depends on the variety of cacti and succulent that you are growing. For example, forest-growing epiphytes, such as Rhipsalis, need semi-shade, but an Echeveria needs bright light.
During the autumn and winter months, it is best for the plants to be kept cool at night with temperatures of around 8°C to 10°C. In the spring and summer the plants need good ventilation, but will survive in high temperatures.
A free-draining compost, such as Miracle-Grow cacti and succulent potting mix is a good compost to use as it has added girt and sand for optimum drainage. It also contains the right level of nutrients for your cacti and succulents.
Watering and feeding
There is a common misconception that cacti and succulents only require a small amount of water. Even though they have water-storing characteristics in their leaves and stems which allow them to survive in dry habitats, they will certainly not thrive with little water. Watering is an essential part to how well your cacti or succulent grows. Overwatering will stunt growth, but under-watering causes shrivelling.
Tepid rainwater should be used for watering, rather than tap water. This is because the minerals in tap water build up in the soil and can cause deposits on the leaves. Minerals also disrupt the flow of essential nutrients to the plant.