The number one adenium watering tip is that succulents do not like to be waterlogged. Your watering schedule may need to be adjusted if your climate is high in humidity. A high level of phosphorus is the best fertilizer to use. Clay retains water. Soil that is too clayy will not drain fast enough to hydrate succulents and cacti. The woody barks of mature cacti plants from any of these species are often very similar to trees. Gynelle, the shop owner, also has a bestseller: Cacti and succulents: Choosing and styling, caring by Gynelle.