Lower leaves turning yellow.

Okay so I posted this problem a while back, and I was told a few solutions that didnt seem to work. Like I said, the lower leaves are turning yellow, and the upper leaves are beggining to look a little lighter as well.

I'm on a 20/4 cycle. Ph is a little over 6. I'm watering every 2-3 days depending how dry the soil is. For nutes I use 6ml flora micro, 12 ml of flora grow, and 3ml of flora bloom. The temps in my growbox CAN get a little hot on the days where its gets pretty warm in my city. I have seen the temps get up to 90-95, but it never stays this way for long, as the 4 hour rest cycle is set during the hottest time of day where i live. I honestly cant figure out what I am doing wrong. I check on my girls every day 2-3 times. Anyone have ANY ideas?

I know I say this alot in this forum but how big are those pots your using and how old are those plants ???

Quick Deficiency Guide

Nitrogen: Entire plant is light green in color; lower leaves are yellow; growth is stunted....

Phosphorous: Entire plant is bluish-green, often developing a red or purpleish cast; lower leaves may be yellow, drying to a greenish-brown to black color; growth may be stunted...

Potassium: Leaves have a papery appearance; dead areas along the edges of leaves; growth is stunted...

Magnesium: Lower leaves turn yellow along the tips and margin and between the veins; the lower leaves wilt...

Calcium: Young stems and new leaves die...

Zinc: Leaf tissue between the veins is lighter in color; yellowed; papery in appearance...

Iron: Leaf tissue appears yellow, while the veins remain green...

Copper: Leaf edges appear dark green or blue; leaf edges curl upward; young leaves permanently wilt...

Sulfur: Young leaves turn pale green, while the older leaves remain green; plant is stunted and spindly...

Mananese: Growth is stunted; lower leaves have a checkered pattern of yellow and green...

Molybdenum: Leaves are stunted, pale green, and malformed...

Boron: Young leaves are scorched at tips and margins...



your plant needs some magnesium imo.

What can you get that has the right amount of mag in it ??

you dont use tap water do you? if you use bottled water switch to tap and you should be fine. if you do use tap you have low mineral levels in your area.

here is a little data on water you may find helpful.


sources say that few brands of bottled water offer a significant amount of minerals. Below is a comparison of calcium and magnesium in bottled and tap water in a few major cities. The numbers represented in this table are the percentages of FDA recommended daily intake per liter for adults...... http://www.chem.duke.edu/~jds/cruise_chem/water/wattap.html

I do use tap water that has been sitting for at least 24 hours. for the chlorine and what not. So if i need more magnesium, would i just up the dosage of the particular bottle of nutrients that contains magnesium? Or would that throw off the cycle?

And sorry i really should have added, the pots are about 1.3 gallon, and the plants are about 3.5 weeks old.

The Weedster said:

What can you get that has the right amount of mag in it ??

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Xen Cuts said:

I do use tap water that has been sitting for at least 24 hours. for the chlorine and what not. So if i need more magnesium, would i just up the dosage of the particular bottle of nutrients that contains magnesium? Or would that throw off the cycle?

And sorry i really should have added, the pots are about 1.3 gallon, and the plants are about 3.5 weeks old.

Click to expand...

For mag... Epsom salt bro... 1 Tbs to 1 gallon... instant magnesium, works great!!!

you can just use some epsom salt at 1 tbsp per gallon of water. Epsom salts contain hydrated magnesium sulfate, two elements crucial to plant growth.

This is a pretty stupid question, but where would i go about finding a bag of epsom salt? Hardware store or something? I tried google but the only thing that came up was skin/body care stores.

EDIT:: Okay so i managed to find a few places that sell it convieniently located a few blocks from where i work. But the product they offer is a bath salt. The main component IS epsom salt, but it is combined with sea salt, and maybe some perfume. Would that work?

Yea a pharmacy... any pharmacy... it's like a buck.

anywhere really, 99 cent store, walmart, grocery store, drug store etc.

And it doesnt have to be PURE epsom salt? A little perfume won't hurt my girls?

Bitches love perfume.

just grab the stuff that says epsom salt on it. its usually in a milk carton.