Hi,
I use Biotabs for a while. Yes you should put 20ml of Orgatrex with 1g of Bactrex mixed in 0,5L of water at the beginning of week 5 even though the plant looks healthy.
During the pre-flowering phase you can add some foliar spray (Boom Boom Spray) once on week 1 and once on week 2, but that’s not mandatory.
Once the pre-flowering phase is finished you can start to use the Bio PK 5-8 (from week 3). Stop feeding the plant 2 weeks before harvest and you should get a nice harvest of tasty and sticky buds.