To determine if your succulent requires watering, make sure the soil has dried completely. In the winter when the plant is dormant, save up on your feed - your cacti doesn't need it. It is important to repotte your plant at least once per year in order to keep it alive and allow it the necessary space for growth. For string of dolphins to thrive, they need at least six hours in indirect sunlight. The ideal time for this plant is between four and six hours of direct sunshine each day. Aloe Vera, also known as the "plant of immortality", is thought to be the oldest living plant on Earth.