I have a lot of Ocimum sanctum plants in my garden, all in pots, but recently I shifted the plants to new building. Now I found that all the plants are shedding all the leaves, which look dried. I examined the roots, and they're decayed and slowly spreading to the stem. Please clarify what is the problem? The soil is not in direct sunlight. Most plants are showing same symptoms.
Root and Stem Decay
Certified GKH Gardening Expert
It sounds like they have root rot. It is likely either Pythium and Rhizoctonia root rot, as these are most common on these plants. These articles will have more information: