Leaf discoloration, HELP

Need some guidance…
Ok the particulars:
Strain: Strawberry Kush- in soil mix of FF-OF- and Roots Organic- Camo bag.
Nutrients: Advanced Nutrients whole grow.
Went to 12/12 on April 3rd.
Latest info from journal-
5/1 2 liters of plain distilled water- 1st and only time for just plain water- nutes in all rest of feedings. PH 7.0 in 5.9 out @ 66 degrees
5/6 2 liters distilled with AN sensizym-2ml/ Big bud- soluble potash 2ml/L, Bud Candy- Magnesium nitrate 2ml/L with Voodoo juice, piranha, and Tarantula all 3 @ 2ml/L PH 6.0 in 5.7 out @ 65 degrees
5/9 same feeding with addition of Sensi Bloom 4ml/L
5-4-8 PH 6.0 in 6.0 out @ 64 degrees
Pic 1 is of a shoot at top with what looks like black discoloration
Pic 2 and 3 or from mid to low on plant
Stems of leaves are red on top but only on top

@Paulcrf, wow brother nutrent over kill…way to much. And your P H is way out of wack.
Causing lockout.
Hope this helps. This is a pic and of i believe it is. What i posted is a ittle large but very informative. Just copy and paste it in your files for reference.

Phosphorus deficiency

Benefit: Phosphorus does a lot of things for the plant. One of the most important parts of Phosphorus is: It aids in root growth and influences the vigor of the plant and is
one of the most important elements in flowering as well helps to germinate seedlings.
Phosphorus is an essential plant nutrient, and since it is needed in large amounts, it is classified as a macronutrient. Phosphorus is a MAJOR important nutrient in the plants reproductive stages. Without this element the plants will have a lot of problems blooming without proper levels of Phosphorus.

When your plants are deficient in phosphorus, this can overall reduce the size of your plants. Not enough causes slow growth and causes the plant to become weak, to little amount of Phosphorus causes slow growths in leaves that may or may not drop off. The edges all around the leaves or half of the leaves can be brownish and work its way inwards a bit causing the part of the leaves to curl up in the air a bit. Fan leaves will show dark greenish/purplish and yellowish tones along with a dullish blue color to them. Sometimes the stems can be red, along with red petioles that can happen when having a Phosphorus deficiency. This isn’t a sure sure sign of you having one though, but can be a sign. Some strains just show the red petioles and stems from its genes.
So pretty much the overall dark green color with a purple, red, or blue tint to the fan leaves is a good sign of a Phosphorus deficiency. Having Cold weather (below 50F/10C) can make phosphorous absorption very troublesome for plants.
Many people get a Phosphorus deficiency confused with a fungus problem because the ends of the leaves look like a fungus problem, But the damage occurs at the end of the leaves. side of the leaves and has a glass like feeling to it as if it had a ph problem. Parts affected by a phosphorus deficiency are: Older Leaves, Whole plant, Petioles.

Too much Phosphorus levels affect plant growth by suppressing the uptake of: Iron, potassium and Zinc, potentially causing deficiency symptoms of these nutrients to occur def in plants. A Zinc deficiency is most common under excessive phosphorus conditions,
As well as causing other nutrients to have absorption troubles like zinc and copper. Phosphorus fluctuates when concentrated and combined with calcium

Problems with Phosphorus being locked out by PH troubles
Cold wet soils, acid or very alkaline soils, compacted soil.


Phosphorus gets locked out of soil growing at ph levels of 4.0-5.5
Phosphorus is absorbed best in soil at a ph level of 6.0-7.5 (wouldn’t recommend having a ph of over 7.0 in soil) Anything out of the ranges listed will contribute to a Phosphorus deficiency.
Solution to fixing a Phosphorus deficiency
Some deficiency during flowering is normal, but too much shouldn’t be tolerated. Any chemical or organic fertilizers that have Phosphorus in them will fix a Phosphorus deficiency. If you have a phosphorus deficiency you should use any N-P-K ratio that is over 5.Again Peters all purpose 20-20-20 is a good mix. Miracle grow Tomato plant food, Miracle grow All purpose plant food (Only mixing at ½ strength when using chemical nutrients, or it will cause nutrient burn!) Other forms of phosphorus supplements are: Bone meal, which is gradual absorption, I suggest making it into a tea for faster use, where bone/blood meal is slow acting, but when made into a tea it works quicker! Fruit eating bat guano, which is fast absorption, Worm castings, which is gradual absorption, Fish meal, which is medium absorption, Soft Rock Phosphate, which is medium absorption, Jamaican or Indonesian Guano, which is fast absorption. Crabshell, which is slow absorption. Tiger Bloom , which is fast absorption.

Here is a list of things to help fix a Phosphrus Deficiency.


Advanced nutrients Bloom (0-5-4)
Vita Bloom (0-7-5)
BC Bloom (1.1-4.4-7)
GH Flora Bloom (0-5-4)
GH Maxi Bloom (5-15-14)
GH Floranova Bloom (4-8-7)
Dyna-Gro Bloom (3-12-6)
Fox Farm Tiger Bloom (2-8-4)
Awsome Blossums


Dr. Hornby’s Iguana Juice Bloom (4-3-6)
Advanced Nutrients Mother Earth Bloom (.5-1.5-2)
Fox Farm Big Bloom (.01-.3-.7)
Earth Juice Bloom (0-3-1)
Pure Blend Bloom (2.5-2-5)
Pure Blend Pro Bloom (2.5-2-5)
Buddswell (0-7-0)
Sea Island Jamaican Bat Guano (1-10-0)
Indonesian Bat Guano (0-13-0)
Rainbow Mix Bloom (1-9-2)
Earth Juice Bloom (0-3-1)
BIO BLOOM (2-6-3.5)
AGE OLD BLOOM (5-10-5)

Any of these will cure your phosphorus deficiency. Affected leaves will not show recovery but new growth will appear normal.

Now if you added to much chemical ferts and or organics,( which is hard to burn your plants when using organics) You need to Flush the soil with plain water. You need to use 2 times as much water as the size of the pot, for example: If you have a 5 gallon pot and need to flush it, you need to use 10 gallons of water to rinse out the soil good enough to get rid of excessive nutrients.

Note: Blood Meal, Dried Blood, Guanos, Kelp Meal, Cotton Seed Meal, Peat Moss,
Sulfur and fish meal are all acidic and can bring your ph down, so if you add these please monitor your ph when using those.

Note: Bone Meal, Rock Phosphate, Wood Ashes pretty much all ashes, Shellfish Compost and Crab Meal are all alkaline and can make your ph go up, so if you add any of these please monitor your ph.

Hope this helps
B Safe

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Will thank you for the information. So if I am reading this correctly my next course of action would be to flush this plant. If Phosphorus is locked out due to my PH being low what should the PH of my flush water be? Also the PH of the RO water I can get varies- the last gallon I got had a PH of 7.6 and a PPM of 1200, so I switched to distilled. Will flushing my plant with distilled water cause any problems?
Thanks again

You want your p h say around 6.0 to 6.5. Mine was 7+ fdso I flushed with 5.0 to 5.5 growing 3 gal bucket used 3 gal water my last run off check in at 6.5
And no its fine to use. Just p H your waterway lower like I did. Let me know how it go’

B Safe

great info as always Will, thank you. I am in 3 Gal cloth pots so approx 6 Gal of distilled water PH’ed to 6-6.5. After the flush and going forward what is a reliable feeding schedule? I have read both, feed, feed, water and another says to alternate as in feed, water, feed. The info I gather from folks on here I should read my girls as I go but avoid the more is better trap I got into by feeding every time because I didn’t see a problem for quite a while. the point I am taking from this lesson is to err on the side of caution.

This is where commonsense comes in. I always feed1/2 strength till last three wks. Then full strength.

No feed your girls pick a day say Sunday and feed them every Sunday. Nun of all that other B.S and P H All water I p h my feed ?after adding nutrients. Had someone who p h there water then added nutrients… Wrong…lol


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Will, I have been feeding them based on the weight of their containers, and a moisture probe I picked up at the hydro store. They are dry about every 3rd or 4th day, sometimes 5. Would they do better if I went to a more regulated schedule like an every Sun?
I flushed yesterday with GH Floraclean and PH’ed the water to 6.5 so I was thinking a light feeding 1/2 strength when they are next dry again PHing to 6.5

OK…see your ointhe right thing. My grow may have less or more best than yours or vice versa so we all water at different times… Either way every 4 or 5 days is fine. Just get on what your doing your fine my friend.


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