This succulent is a hardy and durable plant that will grow to be less than three inches tall at maturity. Its diameter will also remain under six inches. It is important to water your Haworthia plant two to three times a week. Mini succulents have a shorter lifespan than other types of succulents. It all depends on what variety they are and how much care you give them. Mini succulents can be very easily cared for. Indoor mini succulents can grow up to six inches tall if kept small. Let's now get into the frequently asked questions about small succulents.