I cave these guys a last feed before i start giving only water and the next day or 2 yellowing in the top bud site started to appear. Does anybody knows what that is? Only this plant has this symptom.
PS: Also for the last few days should i give 6,5ph water or straight from the tap?
Weeks since germination is irrelevant. Time in flowering is what matters, and most plants will be ripe 8 to 10 weeks from the start of flower. On what date did pistils first appear at the tips of the plant? Add 10 weeks to that date and you’ll have a decent estimate.
You have several weeks to go. Start looking at trichomes when the white pistils turn brown and recede back into the flower.