Is this a deficiency, nute burn, or light stress?

ogderp

Well-Known Member
This has been going on for about a week now with my plant, the new growth was starting off with more yellow spots on them, but a lot of it has gone away as the leaves have matured and now the edges and tips of the leaves have turned brown and curled, as you can see. And this is only affecting the new growth, this has not happened to any of the older leaves. I can’t quite pin down what deficiency this is, I found one pic online that looks the same as what my plant is experiencing, but that same pic had two different captions, which were potassium deficiency and nute burn. Anyone here have an idea of what it is?


I’m growing in a 2x2x4 tent and using a Mars Hydro Epistar Pro 400W LED, the medium I’m using is soil and its Dr. Earth Pot of Gold soil, so far I’ve fed Dr. Earth starter fertilizer 2-4-2, GS plant foods organic kelp concentrate, Dr. Earth Pure Gold liquid plant food 1-1-1, and Dr. Earth tomato vegetable and herb fertilizer 4-6-3. Temperature has been from the low 60’s to the mid 70’s and RH has been between 40-50%, and yesterday’s pH reading was 6.8 so I’m not sure what this could be, maybe light stress?
 

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JoeBlow5823

Well-Known Member
Its probably nutrient and light burn. How close to the plant is the light? For future grows, go to a grow store and buy soil blended specifically for growing weed. If you start with good dirt, you dont need all those nutrients. All you need to do is top dress with a dry amendment bloom fertilizer at the start and 4 weeks into flower.
 

ogderp

Well-Known Member
I wouldn't use all those nutes on such a small plant.......
Its probably nutrient and light burn. How close to the plant is the light? For future grows, go to a grow store and buy soil blended specifically for growing weed. If you start with good dirt, you dont need all those nutrients. All you need to do is top dress with a dry amendment bloom fertilizer at the start and 4 weeks into flower.
The light is 18 inches away from the top of the plant, I moved her to the other corner of the tent so that she’s not directly under it anymore. I gave all of those nutrients to her because I’ve been trying to follow this grow guide by the founder of Dr. Earth, which is specifically for growing weed. The results so far haven’t been that good though, and a lot of the products in this grow guide have been discontinued so I’ve had to substitute those ones with others from the Dr. Earth line that are the most similar.

Dr. Earth used to make a soil specifically blended for growing weed, but its been discontinued so I went with Pot of Gold instead since the guide said that you could also use that one, but I don’t think its the best suited soil for growing weed because this plant is almost a month old and still pretty small. I’ve used Happy Frog soil by Fox Farms in the past and I’ve had better results from that one than this Dr. Earth soil, I only chose this one because I wanted to do an all organic grow. I think that I’ll go with this other soil called recipe 420 next time, its specifically blended for weed and they make a variety designed for indoor growing or maybe I’ll just blend my own soil.
 

Zinger59

Well-Known Member
The light is 18 inches away from the top of the plant, I moved her to the other corner of the tent so that she’s not directly under it anymore. I gave all of those nutrients to her because I’ve been trying to follow this grow guide by the founder of Dr. Earth, which is specifically for growing weed. The results so far haven’t been that good though, and a lot of the products in this grow guide have been discontinued so I’ve had to substitute those ones with others from the Dr. Earth line that are the most similar.

Dr. Earth used to make a soil specifically blended for growing weed, but its been discontinued so I went with Pot of Gold instead since the guide said that you could also use that one, but I don’t think its the best suited soil for growing weed because this plant is almost a month old and still pretty small. I’ve used Happy Frog soil by Fox Farms in the past and I’ve had better results from that one than this Dr. Earth soil, I only chose this one because I wanted to do an all organic grow. I think that I’ll go with this other soil called recipe 420 next time, its specifically blended for weed and they make a variety designed for indoor growing or maybe I’ll just blend my own soil.
Marijuana that grows in the soil which accepted the seed from Mother plant is organic.
 

JoeBlow5823

Well-Known Member
The light is 18 inches away from the top of the plant, I moved her to the other corner of the tent so that she’s not directly under it anymore. I gave all of those nutrients to her because I’ve been trying to follow this grow guide by the founder of Dr. Earth, which is specifically for growing weed. The results so far haven’t been that good though, and a lot of the products in this grow guide have been discontinued so I’ve had to substitute those ones with others from the Dr. Earth line that are the most similar.

Dr. Earth used to make a soil specifically blended for growing weed, but its been discontinued so I went with Pot of Gold instead since the guide said that you could also use that one, but I don’t think its the best suited soil for growing weed because this plant is almost a month old and still pretty small. I’ve used Happy Frog soil by Fox Farms in the past and I’ve had better results from that one than this Dr. Earth soil, I only chose this one because I wanted to do an all organic grow. I think that I’ll go with this other soil called recipe 420 next time, its specifically blended for weed and they make a variety designed for indoor growing or maybe I’ll just blend my own soil.
There are tons of organic soil options out there. Stop at a local grow shop and talk to them. Interacting with real people can be a lot more helpful than the internet (but always remember grow shops make their living selling you things you dont need along with the ones you do). Do you use a quality digital PH meter? Are you ph'ing your water AFTER you add nutrients? Do you know the PH of the dirt you are using? Growing is more art than science. Following a grow guide is only going to get you so far. A small plant in good dirt really shouldnt need any nutrients until it starts flowering. And when I say "small plant" I mean something intended to yield a pound or less. 18" should be fine for the light. If you can comfortably hold your hand under it, weed can grow under it is kind of a simple rule of thumb. I think your plant has full blown nutrient lockout due to nutrient burn and or incorrect PH. Personally I would just start over with different dirt and not even think about nutrients until flowering cycle. Just to give you an idea of what can be done with soil, alone..... See any major nutrient deficiencies in these? They are growing under a 1000W double ended HPS (its stupid bright.) This picture was taken 6 weeks from putting seeds into soil.

IMG_3722.JPG
 

Snoopy808

Well-Known Member
I agree with you start over. With better soils etc.
It looks like nutrient burn thats progressed to lock up. Someone said bottom leaves show deficiencies, true sometimes. In this case your lowest leaves in the picture are the darkest, and while the top most fan leaves are showing burn. With your growing tips stunted. The dark lower leaves could be showing to much Iron and or potassium. The leaf burn doesn't necessarily mean too much nitrogen but could be too muck K+. So check your ppm and pH before feeding plants. May never know your nute burn.
Flush flush flush with water. Lock up looks like calcium and phosphorus deficiencies as presented by stunted growth at the top. Both can be pH issues too.
 

JoeBlow5823

Well-Known Member
I agree with you start over. With better soils etc.
It looks like nutrient burn thats progressed to lock up. Someone said bottom leaves show deficiencies, true sometimes. In this case your lowest leaves in the picture are the darkest, and while the top most fan leaves are showing burn. With your growing tips stunted. The dark lower leaves could be showing to much Iron and or potassium. The leaf burn doesn't necessarily mean too much nitrogen but could be too muck K+. So check your ppm and pH before feeding plants. May never know your nute burn.
Flush flush flush with water. Lock up looks like calcium and phosphorus deficiencies as presented by stunted growth at the top. Both can be pH issues too.
Yeah its definitely a matter of compounding issues. To me it just looks like the plant is locked up, absolutely pissed about what the roots are in and hates its life. If this plant could be wearing all black clothes with lots of chains zippers and buckles, black eyeliner, black lipstick, black finger nail polish, pink hair, and several bracelets to hide the scars, it would. Looks like its growing up in a toxic environment. If I was strolling around a sewage dump and seen that growing, I would think to myself, yup, looks exactly like what its growing in. Purple stems, leaves ranging from brown to yellow to light green to super dark green, and all around stunted growth. She just looks like a typical teenage girl.... pissed about everything.

Its almost like when a dog pisses and a spot of grass dies where it pissed but all around that dead spot, where it didnt get pissed on as much, the grass is super green and healthy. Your plant looks like it got pissed on to much. Good dirt is designed to have all the nutrients your plant needs without having to piss on it. Stop pissing on your plants LMAO.
 
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