Plant leaves still having trouble.

jteether

jteether

Active Member
So last week I accidentally over-watered my plant. Several leaves died, I trimmed them, and didn't water. Then my plant started to perk back up. A few days ago I tried watering her again with some nutes and she got droopy again for about a day. I didn't give her very much water so the soil must still be moist in the bottom.

Anyways, overall she looks good, but two leaves are having trouble. One has got burn marks all over it, which I think may have been from some tinfoil I had in the room. It has since been removes and other than the spots the leaf looks ok (pic 1)

The other one has got spots but they look different. You can't really see in the picture, but the leaf is turning yellow and curling. It looks a lot like the leaves that died from over-watering earlier.

I do not know the ph of anything I'm using but I am working on getting some testing stuff so I'll be able to fix any problems there.

Does anyone have any input on what might be the cause of the problem? If I've left out any info, check out my grow journal in my sig, I probably have it listed there.

Thanks so much for any help or advice.
 

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BeefSupreme

BeefSupreme

Active Member
You got mad nutrient burn. Get a TDS meter to test the strength of your nutrient mix. before i got mine my PPM was at 4500 on some of my plants! it should be around 1000, and i didnt feed them that much, but it builds up quick. For now, FLUSH FLUSH FLUSH, at least 5 times the volume of your pots
 
DocBrown

DocBrown

Well-Known Member
That doesn't look like nutrient burn to me. Since you don't know the PH of anything then it must be a PH issue which can lead to deficiency's. You have necrotic spots on those leafs so it may be a Phosphorus or Calcium deficiency. I'm not an expert but for the past couple of weeks I've been doing a lot of reading on plant problems since I have one going through this myself. You can diagnose the problem here http://420magazine.com/forums/frequently-asked-questions/81266-cannabis-plant-pest-problem-solver-pictorial.html hope it helps.
I forgot to mention, make sure you get a PH and TDS reader to prevent issues like these.
 
Green Cross

Green Cross

Well-Known Member
jteether said:
So last week I accidentally over-watered my plant. Several leaves died, I trimmed them, and didn't water. Then my plant started to perk back up. A few days ago I tried watering her again with some nutes and she got droopy again for about a day. I didn't give her very much water so the soil must still be moist in the bottom.

Anyways, overall she looks good, but two leaves are having trouble. One has got burn marks all over it, which I think may have been from some tinfoil I had in the room. It has since been removes and other than the spots the leaf looks ok (pic 1)

The other one has got spots but they look different. You can't really see in the picture, but the leaf is turning yellow and curling. It looks a lot like the leaves that died from over-watering earlier.

I do not know the ph of anything I'm using but I am working on getting some testing stuff so I'll be able to fix any problems there.

Does anyone have any input on what might be the cause of the problem? If I've left out any info, check out my grow journal in my sig, I probably have it listed there.

Thanks so much for any help or advice.
Click to expand...
This is a good example why you should add 20% pealite to your soil to make it lighter, and drain properly. Is there drainage material in the bottom of the pot?
 
DocBrown

DocBrown

Well-Known Member
Here is a helpful chart as well.



NITROGEN (N) Pale plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the plant. Add any chemical fertilizer containing N. Treated plants recover in about a week.

 PHOSPHORUS (P) Slow or stunted growth, red stems. Smaller leaves that are dark green. Lower leaves yellow and die. Add chemical fertilizer containing P. Affected leaves will not show recovery but new growth will apear normal.

 POTASSIUM (K) Affected plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower leaves. Red stems. Leaves appear pale or yellow. Add chemical fertilizer containing K.

 CALCIUM (Ca) Lack of calcium in the soil results in the soil becoming too acid. This leads to Mg or Fe deficiency or very slow stunted growth. Treat by foliar feeding with one teaspoon of dolomatic lime per quart of water until condition improves.

 SULFER (S) Plants suffering from S definciencies exhibit yellowing of new growth. Mix one tablespoon of Epsom salts per gallon of water until condition improves.

 MAGNESIUM (Mg) Lower leaves yellow and may even turn white while veins remain dark green. Blades die and curl upward.

 IRON (Fe) Leaves on growing shoots turn pale and veins remain dark green. pH imbalances make iron insoluble. Foliar feed with chemical fertilizer containing Fe or rusty water.

 MANGANESE (Mn) Necrotic and yellow spots form on top leaves. Mn deficiency occurs when large amounts of Mg are present in the soil. Foliar feed with any chemical fertilizer containing Mn.

 BORON (B) Growing shoots turn grey or die. Growing shoots appear burnt. Treat with one teaspoon of Boric acid (sold as eyewash) per gallon of water.

 MOLYBDENUM (MO) Yellowing of middle leaves. Foliar feed with chemical fertilizer containing MO.

 ZINC (Zn) White areas form at leaf tips and between veins. Occurs in alkaline soils. Zn deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zn can also be used.

 OVER FERTILIZATION Causes leaf tips to appear yellow or burnt. To correct soil should be flushed with three gallons of water per one gallon of soil.
 

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jteether

jteether

Active Member
To me and from what a lot of these quick diagnosis guides say it looks like Nitrogen deficiency. The yellowing started in the middle and on the tips of the leaves and then spread. But I'm scared to give it any nutrients since I just flushed her... Anyone also think it might be nitrogen def. ?
 
jteether

jteether

Active Member
It could also be a calcium deficiency but i added some potash to it to try and help with that. I guess I'll add some very diluted fertilizer to it and see how she responds.
 
jteether

jteether

Active Member
Hey Doc, I just read through your journal! She is vegging right now, 12 days short of 2 months old. This is my first grow and I made some mistakes along the way so she's a bit smaller than she should be.
 
DocBrown

DocBrown

Well-Known Member
I don't think it's a Nitrogen deficiency to be honest since there's black spots on the leafs. I asked what stage it was in because I read and was also told that it's normal for flowering plants to have yellow leafs at the bottom. Hope you and I both find a solution, I plan on feeding her next watering and see how that goes.
I'd like to see a picture of the whole plant when you have some time if you don't mind.
 
jteether

jteether

Active Member
I think you may have been correct when you suggested calcium or phosphorous deficiencies. I haven't really been feeding her any nutes until this point so she must be missing something. There are some pictures from yesterday in my journal. I will take some more pics sometime today and post them here.
 
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