It looks quite normal to me. There are different varieties of tulsi and some have tiny leaves. I would suggest pruning by removing the flowers and cutting back the branches and fertilizing the plant.

I went to a relative's house that had a tulsi which has been ignored for several years and it looks somewhat like this https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Ocimum_tenuiflorum2.jpg/440px-Ocimum_tenuiflorum2.jpg

Mine is much younger but it looks like this

https://1.bp.blogspot.com/-K04V_fo0f2o/TjE00Uxwk5I/AAAAAAAAAWM/Vimt-5iPOAI/s1600/2011JulyHolyBasil.jpg

Thanks! I believe I have a 'Rama Tulsi" and yours seems to be 'Shyama' or 'Krishna' Tulsi. Rama tulsi usually has larger,greener leaves and Krishna tulsi has smaller and darker coloured leaves. Krishna tulsi is more common as it has greater health benefits.

Also, I did more research and found out that if you let the plant flower. it causes the stems to harden and the leaves either stop growing and the plant dies or the leaves don't grow as vigorously.

I would prune all the side branches at least half or more to promote new bushy growth. Cut it like so above a node. The plant would also benefit from a repot

I prunned the side branches as you suggested and fertilized it. You are right, the stem and some of the mature branches are hard. Will definitely repot it.. maybe next weekend.. really appreciate your inputs Riddhesh☺ thank you

You need to plant in a separate pot from other plant, it is not getting enough nourishment. I grow holy basil by thousands and donate free to temples all over.

@kathyvakamudi, after I removed the schefflera plant from the pot, my tulasi plants recovered and are growing well. My only issue now is the plants are getting powdery mildew on them. I tried milk solution and neem oil solutions but they don't seem to be working☹️ The plants are growing new leaves everyday, just that the older leaves get a mild white powdery coating on top.