Help me identify the problem

[albgrow]

Hello!
Its on third week of flowering and mostly lower leafs are looking like in picture. Im not sure is it phosphorus deficiency or toxicity. Or anything else. Thank you

 

[GNick55]

Hello!
Its on third week of flowering and mostly lower leafs are looking like in picture. Im not sure is it phosphorus deficiency or toxicity. Or anything else. Thank you

take picture of the plant

 

[HerbalEdu]

No need to worry about lower and older leaves slowly dying along flowering especially bottom of canopy with low light penetration.

Pic of the whole plant(s). Would help to see if the amount of leaves decaying is normal or if there is too much.

 

[albgrow]

take picture of the plant

Leafs are also staring to look light green. It's a little bit early i think.
I know at this phase i shouldn't worry, but im afraid it will spread and go all like the leaf im sending now.

 

[Tyrant]

How big is that pot does it have proper drainage whats your watering technique like. Are you using notes if so how much.

 

[albgrow]

How big is that pot does it have proper drainage whats your watering technique like. Are you using notes if so how much.

The pot is 11l. Watering is done underneath i fill up the tray 1.1 - 1.2l per plant and it absorbs it all in 3-4 hours. EC=1.7, ph= 6 - 6.2, co2 = 500pp. 1000 watt hps lights. Temp 21-28°C, humidity 55-65% during the day and 60-75% during the night. Im using plagron as fertilizer. Last week i watered them with plain water couse i saw signs of nutrients burn.