Most of the buses plying from Bangalore to Nagercoil/Kanyakumari/Trinelveli stops at Hosur for 90 minutes to load flowers. The problem here is passengers has to ’just wait inside the bus until the load is complete. This will take easily 90 min. If you check with staff, you will be threatened (well almost).
when the bus reaches Thovalai where these flowers are unloaded, passengers who are expecting to get out at their destination, now has to wait another 60 min atleast. So in total you will be wasting 2 hours plus.
So, my suggestion is , look out for other travels and avoid KPN. There are plenty of options. ABT, ARC to name a few.