300W LED Indoor problem

Hello! I am growing my 4 plants with 300 MarsHyrdo led panel, which is pretty decent. I've got 90x90x160 tent.
Intake and extraction fans which are more than enough for my size tent. I am using biobizz light mix for my plants, 14l pots with drainage on bottom. Watering every 3-4 days, also using biobizz grow with 1ml/l dosage.
What I've noticed on all my plants, that they're starting to yellowing from bottom fan leaves.
I tried to search on multiple forums and posts, saw many similarities to mine, but nothing really appears to be my problem. So I am hoping to some of You could help me individually on my case. Here is few pictures of how it looks.
http://i.imgur.com/l6PI1zc.jpg
http://i.imgur.com/vUM1PVZ.jpg
My tent inside. http://i.imgur.com/U20tOFg.jpg
Plants are in 1mont of veg from seed. 18/6 time cycle.

That is burn. 1ml/l is about 4ml/gallon which is probably a little too much at this stage in their young life. Maybe try 2ml/gallon or .5ml/l and see how they react. When they are that small they need very little.

Just read about the soil and it has nutrients in it, and advises not to feed for 3-4 weeks. I can see your girls are at about the 2-3 week mark so if you do add anything you need to keep it real low.

Agree with Samson. I added nutes to my soil that already had some in it. Dang burn!!

Well, i was feeding them like chart said. (I got it with nutes). So i guess that's not so big problem? Il just water plain for ~2weeks and then I'll be fine?

The thing is, don't follow the nute chart if your soil already has nutes in it and the plant is fine. Just don't use it. Once your plant is big enough and has sucked up the nutes from the soil, you should start feeding it. I didn't need to feed my auto until it was 1ft tall and around a month old because my soil had crap in it. Your plant will let you know when its hungry. Mine sure did.

I fed her early on and she burned like yours. I stopped and she grew fine with just good PH water until she showed she was hungry.
Nice bushy plants tho!

Cheers

if you start noticing the bottom leaves turning a pale green then to a yellow, you'll know you're having a nitrogen deficiency. Look it up, I can't do this for you, but will take free samples of your product once finished.

Good luck and keep up the good work, just remember plants don't want to be pushed to the edge (especially in dirt) they just want easy access to what they want when they need it. Kind of like a junkie except for the no excess part.

I'm still wondering if this could be a phosphorus deff, couse few guys at other forum, wrote that it could be phosphorus locked out because of bad PH. Which is 7,0 (with my lowball tester) Any suggestions? I could upload more screens

Okay. So I got everything cleared out. This is Potassium deff.

Watered them with additional fertilizers and everything should be fine.

lol

kauptukas said:

I'm still wondering if this could be a phosphorus deff, couse few guys at other forum, wrote that it could be phosphorus locked out because of bad PH. Which is 7,0 (with my lowball tester) Any suggestions? I could upload more screens

Click to expand...

Here's your first mistake. If you want to know what's up with your nutrient solution, you need good instruments. Considering the value of the product being grown, it seems silly to 'save' a few dollars on cheap meters... Doesn't it?

Problem is still there.
I've got PH meter for 25 euros. Next "better" PH meter would be around 70 euros which is x2 more expensive than this one. Which is not few dollars.
I am fertilizing it with same biobizz grow 1.5ml/l, using tap water which stays still for atleast 48 hours. Nothing really helps ant the problem seems to being worse.
Here some screens. Looks like Nitrogen and Pottasium def combined, i can't believe it could be that couse i am feeding them really good. Should i got for 2ml/l ? Feeding chart shows i should use about 2-3 ml/l for week 5.
Here some screens. Any suggestions ?
http://i.imgur.com/LSUmFhs.jpg
http://i.imgur.com/fzZ9UK0.jpg
http://i.imgur.com/npfutv8.jpg
http://i.imgur.com/cV2OvCW.jpg
http://i.imgur.com/fDlSVer.jpg
http://i.imgur.com/mIrl43Q.jpg

too many nutes still

Nothing to do with the led,
you feeding her straight horse tranq? Haha

-good luck

SamsonsRiddle said:

too many nutes still

Click to expand...

This is mobile deficiency. Nute burn would affect all leaves, not only bottom and fan leaves. As you can see from photos it starts from inter-vein... not tips.

Nothing to do with the led,
you feeding her straight horse tranq? Haha - wtf?

Slow down on the food/nutes.

kauptukas said:

This is mobile deficiency. Nute burn would affect all leaves, not only bottom and fan leaves. As you can see from photos it starts from inter-vein... not tips.

Nothing to do with the led,
you feeding her straight horse tranq? Haha - wtf?

Click to expand...

Dont listen than. Where not the ones with the dank plant

kauptukas said:

This is mobile deficiency. Nute burn would affect all leaves, not only bottom and fan leaves. As you can see from photos it starts from inter-vein... not tips.

Nothing to do with the led,
you feeding her straight horse tranq? Haha - wtf?

Click to expand...

You are going by a feeding chart from a nutrient company, which by anyone you will ever ask is wrong. They always suggest way too much.

You are going by their "5 week" part of their chart, but their idea of what a plant should be by 5 weeks would probably be more like a 4-5 foot tree, not a little thing like yours. Yours looks like it is only 3 weeks old, so of course it's not going to use as many nutes as they tell you to.

Noone on here has backed up your claims of a deficiency for a reason, because we have all seen what it looks like when a young plant gets more than she needs. It might take the appearance of something else you think you are seeing, but obviously you are not experienced enough to diagnose your own deficiencies.

Just keep doing what you're doing and quite posting on here because obviously you don't want to hear anyone tell you anything other than what you want to hear.

Well I got the idea you want to say.
Do you want to me inform you with outcome when everything will be fine?

Id like to see the outcome. Hope they kick back.
It's a great hobby imo. I'm still making mistakes as I go.