What about succulent fertilizer? You can greatly improve the health of your succulents by using the right fertilizer every few weeks. This will happen more often during summer, so keep checking every few days. To provide more nutrients and promote healthy growth, it is best to repot it once every two years or every other year. Although plants can grow all year long, animals often go dormant during the summer months and do not need to be watered except by extreme heat. Keep your plants protected if you live near extreme heats.