Hello everyone, in the last week my plants have been turning yellow on the new leaves, at the top of the plant.

I can’t say for sure but it seems to be iron or sulfur. I’ve never had this kind of problem that I couldn’t solve.

In the pictures it is Afghani and Moweeto .

The plants are currently 1 week into flowering. And all plants have same problem.

Growing plants indoors, space dimensions 120 x 240 x 200

2x Sf 4000 Lights, distance of the tips from the lamp 50 cm

Temperature during the day 25c  and at night 22c

Humidity in the range between 50% and 60%

Soil medium-  peat and vermiculite mix in a ratio of 60% peat and 40% vermiculite

PH 6,2 – 6,5 all plants

EC 1,1 – 1,3 which emerges from the pot down

No pests

Basic food I use is Terra Aquatica ( trio part GMB) plus a Plagron Cal Mag plus,( cal mag 1ml\l almost always)

Advanced nutrients additives ( Piranha, Voodoo juice, Rhino skin , Bud candy)  all grow process , just start whit Bud Ignitor

I use the purest water for plants, bottled water (EC~ 0,1) , the same water I drink. Sometimes I mix it with reverse osmosis.

I have to admit that I may have overwatered a bit, so the pots are a little heavier than usual, but everything is within normal limits after the flush soil  before flowering. Flash EC 1,0 .

I added 1 small spoon of epsom salt after rinsing at the first appearance of yellow color 5 days ago. I also tried spraying with epsom salt solution.

I’m running out of time for these plants, if anyone has had experience with the same problem, I’d like to ask for advice.

This is my first time posting on the forum, any help is appreciated.