Not sure what the problem is

[shaser]

What Strain is it?

MASTER KUSH

How Many Plants?

ONE

Is it in Vegetative or Flowering Stage?

VEGETATIVE

If in Vegetative Stage... How Long?

ABOUT 8 WEEKS

Indoor or Outdoor?

INDOOR

Soil or Hydro?

SOIL

If Soil... What is in your Mix?

MANURE, DOLOMITE ROCK AND SAND

If Soil... What Size Pot?

13X13 INCHES

Size (Wattage) of Light? How Many?

2 ULTRALED 80W

Is it Air Cooled?

NO AC, ONLY INTERNAL FAN AND 2 EXHAUST FANS TO PROVIDE AIR RENEWAL

Temperature of Room/Cabinet?

23-28 C

PH of Medium or Reservoir?

6.5

Any Pests?

NO

How Often are you Watering?

TWICE A WEEK

Type and Strength of Fertilizers used?

BIO BLOOM (4ML/L), BIO HEAVEN (6ML/L), BIO GROW (7ML/L)


Size or Square Footage of Room?

2Mˆ2

So I am having this problem for a while now, the older leaves are falling, which I suspect is a lack of nitrogenium but the top leaves are showing some yellowing too.

I would be thankful for a piece of advice

 

[NuttyProfessor]

have you checked the ph of run off ?

 

[Peripatera]

Your soil looks very bad make a better mix for next grow. That soil look like it's drowning your plant that will cause multiple deficiencies.

 

[shaser]

have you checked the ph of run off ?

Just checked today, it was 6.9

 

[shaser]

I´m quite sure it was drowning before I added some sand to the mix. I really cpuld have made a better job at soil mix, I just couldn´t find the things I needed at the time.
But I´ll keep that in mind, thanks for the answer