newbie would appreciate any help or advice 6 week flowering amnesia

soil from garden in 10 litre but i added 4 inch of coco an pebble at the start of flower
600hps
1 fan over the tops only to cool light
40- 60 rh
ph 6.8 or below never over an runoff 5.9

bio grow for veg
biobloom now for flower
cannazym
an rhiz in veg
temps form 72 to 84 day goes down to 67 by the morn 80rh


my plant is 6 weeks into flower first it showed signs of over fert so i flushed an calmed the feed down but i give it more water now but last two days ive noticed the cause i fimed in an has four colas in the middle the leaves have turned yellowish but not around the out side whast could this be or is it natural but i dont no why the browns there i have the fan blowing ovver top but at night the rh goes up to 80 by the morning other wise when lights on is 40 -60 please help all advice welcome
soil frm garden in 10 litre pot but added a few inch of coco pebble at flowering needed more room for root growth i thought
biobloom 2 ml a litre and i add cannazym 10 ml for 6.5 litres
i first noticed the tips burning so i flushed it a few days ago just used water phed for 2 more feeds then feed it with biobloom abit of pk1314 and thhis is what happened it only at the top though
the next pics are same plant but the buds can you tell me if there doing okay 6 week flowering amnesia
heres a bud at the bootom going along the stem of the main buds shall i take them off to use the energy forthe buds or is it to late


this is the bottom were some of the leaves are going yellow i thought it was expected to do this

Hey, 5.9 seems a little low for runoff. If you're watering at 6.8 i would try bringing that up so that your runoff is more around 6.5

Manganese is very easily locked out, and it looks like the beginning of a deficiency or a lockout.
The problem is, is that its not a quick fix. Once a nute is locked out the pH tables sway erratically. So if you lose calcium and don't do anything your ph could easily drop below 4 because the plant is unable to bind cations with anions!

I would recommend a good flush.

By the way the buds look beautiful! great job!

I find 6.2 is the ideal to aim for, so yeah - water at maybe 7.0, give or take.

Very good job!!!!!!!

Bud looks great. The plants probably just finnishing. Theyll start yellowing at the very end most of the time when your not running as much nitrogen. Its normal. Looks like you can start to cut down your feeding tward chop date because its coming soon. Well done.