Fan leaf discolouration

G

Ganjamon876

Member
Hi,
My plants are in week 5 veg, I’m noticing 2 of 4 are getting some discolouration on few of the leafs & im not exactly sure what could be the problem. The last time I fed them was July 1st . I feed with RO water & advance nutrients. .5 mL per litre of Calmag , & 2.5mL per litre of grow A&B
 

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To add on.. my guess is it could be too much calmag. I was having this problem before about 2-3weeks ago were I was using too much of the calmag (2mL per L) every time fed them, then I did a flush with 1mL per L of just the grow a/b with runoff and hadn’t watered them for a week because the pot just wasn’t dry enough. So July 1st was the only time I watered since then. Side note I don’t know my humidity or temp in the tent. I plan on getting a hygrometer today. I don’t know my ph but that’s because since I’m using RO & advance nutrients I figured I wouldn’t need one at the moment.
 
Are you in coco?
You're using RO, pure RO from what i've been told by my local hydro store is unstable! so it'll cause pH swings/issues etc.
From my own experience using RO, after I've added A + B and my additives, my pH ends up being in the low 5's!

It's suggested if you're using COCO, you need your pH to be between 5.5-6.3ish. (5.5 for veg and 5.8 for flower).
In dirt and full hydro, the recommended pH is even higher.
Do yourself a favour and get a pH meter. This chart will show you why its semi important. And see where cal+mag is on that chart.


 
goofy81 said:
Are you in coco?
You're using RO, pure RO from what i've been told by my local hydro store is unstable! so it'll cause pH swings/issues etc.
From my own experience using RO, after I've added A + B and my additives, my pH ends up being in the low 5's!

It's suggested if you're using COCO, you need your pH to be between 5.5-6.3ish. (5.5 for veg and 5.8 for flower).
In dirt and full hydro, the recommended pH is even higher.
Do yourself a favour and get a pH meter. This chart will show you why its semi important. And see where cal+mag is on that chart.


Click to expand...

I’m using promix hp soil & I most definitely will
 
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