I suck at soil, but it kinda looks like a Potassium def.
Google - marijuana plant problem solver
A friend called me late last night and sent me these pics asking what is wrong with her leaves. I was half asleep and couldn't download pics.lol. I am awake and had my coffee, here they are. I told her my friends on riu know much more than me. I will send her link and we will see. Thanks
I think I know, but I'll wait for an expert to chime in first.
without pertinent information all is but a guess.
"Wheels are made for rolling, mules are made to pack
I've never seen a sight that didn't look better looking back
I was born under a wandrin' star"
not sure what you mean? I didn't want to tell him it looked PH related with some powdery mildew here and there only to have my head ripped off. Thought I'd wait for someone who has been doing this 10x longer than me to say what it might be. I do know I've had this happen once and I just tossed the plant lol.
I typed this from Ed Rosenthal's new book marijuana: Pest and disease control.
Potassium (K) deficiency occurs occasionally in both planting mediums and outdoors in soil, but rarely in hydroponics. Many organic fertilizers such as guano, fish emulsion, alfalfa, cottonseed, blood meals, and many animal manures contain minor amounts of potassium relative to nitrogen and phosphorous.
Too little potassium causes plants to look vigorous, even taller than the rest of the population, but the tips and edges of their bottom leaves die or turn tan or brown and develop necrotic spots.
As the deficiency gets more severe the leaves develop chlorotic spots. Mottled patches of red and yellow appear between the veins, which remain green, accompanied by red stems and petioles. More severe deficiencies result in slower growth, especially when plants are in the vegetative stage. Severe potassium shortages cause leaves to grow smaller than usual.
Too much potassium causes fam leaves to show a light to dark yellow or white color between the veins.
Potassium is necessary for all activities having to do with water transportation, as well as all stages of growth; it’s especially important in the development of buds. K aids in creating sturdy and thick stems, disease resistance, water respiration, and photosynthesis.
Water-soluble fertilizers containing high potassium fix the deficiency. Liquefied kelp, bloom fertilizers, and wood ash are commonly used and work quickly to correct K deficiencies. So do potassium bicarbonate (KHCO3), potassium sulfate (K2SO4), and potassium dihydrogen phosphate (KH2PO4). Potassium silicate (K2SiO3) can be used to supply Si and has 3 percent K in it. Granite dust and greensand take more time to get to the plant and are not usually used to correct deficiencies, but to prevent them.
tell her stop feeding so much......looks like nute burn
I want to sail away to a distant shore..........an' live like an ape man.
Wow, this could be any number of things, but is most likely due to PH, over watering, or over/under fertilizing. Most nutrients on the market today have a pretty well balanced ratio of micro/macro nutrients, but it is important to find out what type of nutes she's using, and how often she is feeding her plants.
Does she have the ability to check her PH in her soil? It should be around 6.5. If she doesn't have a PH pen, and lives in the metro d area, I can lend her mine if she's in a pinch. What is the EC of her nutrient solution? This can vary based upon strain, and what point she is in the growth cycle. If she doesn't have an EC/PPM meter, again, she can borrow mine. 1.2 to 1.5 should be a safe range. I don't see any bud sites, so I'm assuming she isn't flowering yet, so what is she using for nutrients? It obviously should be something higher in N. Something in the 6-4-4 range is good for veg and early flower. How often is she watering, and how does she check her moisture level? If she doesn't have a moisture meter, they are very inexpensive and can be picked up at Home Depot/Lowes for $5.00. In lieu of that, she should be able to feel if they need water by picking up the bucket. If it feels light to lift, it needs water. If not, don't water.
She needs to get us more info, and then start checking off the fixes one by one. Tell her not to do the shotgun approach and start changing multiple variables all at once. She may luck out and fix what is ailing her plants, but she will not be able to pinpoint exactly what was wrong for future troubleshooting if this arises again.