Insecticide soap must be purchased. Add a tablespoon to a spray can with cool, water. Shake it well and spray the succulent. You may use a turkey baster to apply a fine water spray without disturbing the roots too much. While most gardeners use tap water, some gardeners prefer to use rainwater for its healing properties. There are two options: you can either use different genuses to make an "Echeveria Garden", or you can combine them with completely different forms. So, it is always good to use shallow pots, shells, or stones with natural depressions or hollows.