Thyme grows well in slightly dry soil. It can develop root rot or mildew problems if it’s kept too wet. As the roots suffocate and die in wet soil, the foliage will also begin to die back. Drought and overly dry foliage can also cause dieback, although usually the whole plant declines at the same rate.Click to see full answer. Keeping this in view, how do you care for wooly thyme? Growing Woolly Thyme This herb prefers full sun, but will perform in partial shade. When growing woolly thyme ground cover, plant in well draining soil. Preparation of the soil is important. Rake out rocks and impurities and ensure proper drainage.Furthermore, why is my thyme turning purple? If only the outer edges of the leaves are purple, it may be a K or Mg deficiency. If the center of the leaves are also purple, it could be too much Ca in the soil or the result of too much water in the soil blocking uptake of P and Mg. Likewise, people ask, how often do you water thyme? Herb care for plants indoors is much the same as for those outdoors. Water completely each time but allow the pot to dry before watering again. Fertilize thyme with a weak solution of fish emulsion or liquid seaweed, diluted by half every two weeks.How do you keep thyme from getting woody?Use small garden shears or scissors to remove only the soft, green stems from the plant. Do not cut past the woody parts of the herb—this is where it the new growth will occur. Cutting the thyme way back will allow the herb to better withstand the winter weather and encourages new growth in the following season.