This succulent, which is hardy, tends to grow less than three inches in height at maturity and less about six inches in width. Make sure that you give your Haworthia plant water two or three times per week. Like all other succulents and plants, the life expectancy of mini succulents depends on their specific varieties and the type of care they receive. Mini succulents require very little care. Mini succulents grown indoors will reach about six inches in height if they don't get too big. Now it is time to get stuck into some frequently asked questions on small succulents.