Leaves going stripey..

[Redseal]

Any guesses what's up with this? Growing in coco, hand watering using Monkey Juice Bloom at about 1.2 EC, pH 5.6 - 6.0. All the plants have it to some extent, though not as bad as that one.. the leaves go crispy eventually. Everything's the same as on past grows.. same clones, same nutes, same conditions, but never had this before

 

[kryptonchron]

My take is...you have a Phosphorous deficieny. Lack of (P) leads to stunted growth, blue-green leaf tones, purple petioles, leaf tips darken and curl downwards, leaves contort or possibly dry up, dead patches will apear.

 

[sproutco]

I found the analysis of these ferts. It states it contains nitrogen, phosphorus, potassium, magnesium, and sulfur. It did not list micros or calcium. Does it not have these? Odd things will happen without these.

 

[jonnybgood29]

quick question, does it start at the middle of the plant?

 

[Redseal]

I found the analysis of these ferts. It states it contains nitrogen, phosphorus, potassium, magnesium, and sulfur. It did not list micros or calcium. Does it not have these? Odd things will happen without these.

Part A's got calcium, plus the usual micro nutes. I used it on the last grow without any problems

 

[Redseal]

quick question, does it start at the middle of the plant?

Mostly in the middle yea, with one or two bottom leaves slightly affected.. new growth seems ok so far..

 

[sproutco]

Potassium to magnesium ratio is 6.2:1. You may want to add a little more magnesium so that the ratio is closer to 4:1. Start with 15 ppm magnesium more. 1/8 teaspoon epsom salts per gallon (3.8L) of water along with the regular fert. Sometimes plants will redden with mag def like this cotton plant...

 

[Bozo]

Kryp may be on to something Coir has a tendency to hold onto P

 

[sproutco]

My take is...you have a Phosphorous deficieny. Lack of (P) leads to stunted growth, blue-green leaf tones, purple petioles, leaf tips darken and curl downwards, leaves contort or possibly dry up, dead patches will apear.

Right. Leaf margins and edges curl downward with p def. Notice this plants margins curl upward.

 

[bergerbuddy]

coco... holds K otherwise known as "potassium" not Phosphourus... also... leaf curl up is potassium def. but looking at pick I would agree with mg. def.. and try the light epsom salt addition reccomended by sproutco.

 

[Core]

had same thing....other color's.....Mg def ....

 

[jonnybgood29]

if you ask me, i would go with molybdenium lock out my friend! thats the only one i know of that will turn purple and start at the middle of the plant. you need a micro mix that includes moly and mix it in thoroughle before adding nutes!

 

[sproutco]

if you ask me, i would go with molybdenium lock out my friend! thats the only one i know of that will turn purple and start at the middle of the plant. you need a micro mix that includes moly and mix it in thoroughle before adding nutes!

Very interesting guess. With mo def, you might think the plant lacks nitrogen.

 

[jonnybgood29]

a mo def will actually cause the death of the plant eventually because it losesthe ability to process what it takes up! the symptoms look identical to an article i used to use from og before it disappeared. and you describe it to a tee, but what causes it is usually running without any or mixing multi part nutes improperly. flora series will do it if you dont mix the micro thoroughly before adding the ferts!

 

[sproutco]

Really what mo does is convert nitrate nitrogen to a form plants can use. This is called nitrate reductase if you want to read further. (slightly drunk but you get the picture :friends: ) If you use urea or ammonia nitrogen you need no mo. So if your plants diet is nitrate nitrogen which is best you will see a nitrogen def because of mo def. Tricky.

 

[sproutco]

Nitrate reductase enzymes are a group of enzymes which reduce nitrate to nitrite.

Nitrate reductase (1)- is a large and complex enzyme ; has multiple subunits and ~ 800 kD. Contains bound FAD, Mo, and cytochrome 557 and has ferredoxin Fe4S4 center. It is NADH/NADPH-dependent according to organism. Mo is bound to a cofactor containing a pteridine ring to form molybdopterin.

Nitrite reductase (2, 3, 4) catalyzes the last three steps in the reduction of nitrate to NH3. Contains one ferredoxin Fe2S2 center and one molecule of siroheme (partially reduced Fe porphyrin) and the electron donor for each step is ferredoxin.

 

[sproutco]

Tip: one way to tell mo def from nitrogen def is that the margins of the bottom leaves begin to burn unlike n def. This is caused by the nitrate nitrogen "backing up" in the plant and can't be used. Sorta like a nute burn.

 

[jonnybgood29]

which is what his leaves are doing right?

 

[sproutco]

No, they would be yellowing with mo def just like he lacked n. Pretty sure this was mag def. Eyeing a nute def is very, very tricky. Interesting guess though. If you want me to explain mo more i will.

 

[Verite]

Imo I see some ph issue rather than any particular def. Could be a lock up over ph but most defs or lockups will cause spoting/discoloration in the leaf. When the leaf goes full edge and tip krinkle then Im more inclined to lean towards something ph.