Examine your tulsi plant carefully to determine the degree of the damage before taking any further action.
Tulsi plants can suffer from either overwatering or underwatering.
For tulsi to flourish, it needs lots of sunlight.
Remove any stems or leaves that have become yellow or dead.
To supply vital nutrients, use an all-purpose, balanced liquid fertiliser or organic compost.
Consider repotting your tulsi plant in a slightly larger container with new, well-draining soil if the roots have become entangled or the soil quality has declined.
Use neem oil or insecticidal soap to treat the infestation if you spot pests like aphids, mealybugs, or spider mites. You can also manually get rid of the pests.
A dying plant need time to be revived. Be patient and keep providing it with meticulous care.