Some leading causes of succulents dying are overwatering, root rot, or fungal infection. If you notice a blackish-yellow color, then it helps to take action straight away. First, it helps to remove the infected parts and uproot your plants to remove the excess soil to examine the roots. Then you can remove dead and damaged roots and provide your woolly rose with fresh soil. It also helps to keep an eye on pests like scale, spider mites, aphids, and mealybugs. These bugs can also cause your Doris Taylor to die.