Leaves turning yellow - your opinion?

Hi there,

the leaves of my plant turn yellow somehow. Do you guys think this may be a deficiency caused by the lack of fertilizer or is it, or is it even normal becaue of mid-flowering? I read that some yellow leaves are nothing to worry about, but the whole plant starts looking yellow now.

Strain is Skunk#1 from Sensiseeds.



Whats your opinion on this?

Big thanks!

Needs nitrogen. ( and some Cal / Mag )
It's not normal to be that yellow so early.
If it was a week from harvest...the yellowing would be normal. Having one or two leaves yellow up and die off during flowering is normal.
Your yellowing is a defiency.

Its starving

Awesome, thank you guys! Since I'am an expert in overfeeding I went easy this time with fertilizer and always kept a bit below the feeding schedule. Do you think I should just use more of my fertilizer (BioBizz Bloom) or even add Nitrogen Seperately? Thanks!

He guys, me again. The plants still look bad. Did some more research: Looks like the leaves are getting yellow from buttom up. Could this be OVERFEEDING instead? Is there any way I can find out if they are over or underfeed? Don't want to kill the plants by adding even more fertilizer.

Not overfed.