Guide to Nutrient Deficiency or Toxicity

well dam. if i have a 2-part fertilizer, you think i could just not give it nearly as much with the high n, which i think is part A, and just have part B, be normal??

im going to try epsom salt for the magnesium deficiency it seems to have. have you or anybody else used that?

macdaddyDAX said:

im going to try epsom salt for the magnesium deficiency it seems to have. have you or anybody else used that?

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Sure. I've used it to correct def and I use it in my soil mix as a Mg source. 1 tsp / gallon.

Is the picture under nitrogen a good color or a bad color? The post doesn't specify
Thanks

This is an excellent Thread! I didn’t have time to read through all of the comments, but I would like to say 1 thing about nutes and MJ plants: I think many people panic when their plant begins to change at the end of its life, just like I have. After wearing out my fingers typing online to find out what was wrong with my poor MJ plant(s), the best advice I found was this: When your grow is winding down for harvest, the whole plant will change color. DON’T FUCKING PANIC!!!

Right now, my plants are approaching chop/chop time, and the leaves and buds are doing what they always do; change when they die. IMO, the biggest thing to consider when wondering about a nute problem IS: how far along is my grow? This can take a ton of stress off of anyone’s back who is in panic mode over color differences that are inevitable.

Great Advice. Ill be using this myself!!
Man sometimes the nonsense and trolling makes me want to give up on RIU. Threads like these make up for it a bit tho, thank you OP.

I have good luck using BLACKSTRAP ORGRANIC MOLASSES and EPSOM SALTS when i need to add a little of something. anyone one else use these? ive been getting away without buying any decent ferts or nutes. i think i may have to break down and get some good nutes soon tho.

maybe some more comments on ways to fix the problems would help also, like maybe cheap alternatives as well as common nutes.

I'm on my first soil grow but I have helped out with a hydro grow for many years. I was doing quite well up until my third week in bud. Half my plants (the larger ones) started showing deficiencies that I could identify from the illustrations the kind people on here took their time to post. I made a few adjustments to no avail and then realized it was likely that my plants needed a larger container. I moved them from a 5gal bag to a 7gal bag. It's been two days and I am noticing signs of improvement. My plants were not much larger than yours Druid23...good luck.

nick17gar said:

these should help too:

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I would like to start by saying Ty for this post it's helped me a lot thru my grow lol. My Q is that I have something going on that looks like maybe phos dif but not sure. It looks like someone came and scraped parts off of the top and mid fan leaves. Not all the way thru just the green top part of leaf... I'm really confused as not much has changed. I up the nutes some but when that started I diluted them.

Also I have 2 PH meters that are dialed in with same solution so they read pretty much the same maybe .1- .2 difference but nothing more. In the plant having issues water one reads 5.0 and other reads 5.6! Wtf is that all about, idk. In my other bucket it reads about the same as they both fluctuate in that res. I would post a pic but lights off so tomorrow I could after Xmas time with family.

Any help would be awesome. I am running a dro setup in case that matters.

Happy holidays to all and may it be a safe one as well!!!

Is this Iron or Nitrogen Def??? Can someone help please
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Neither. It's normal for new growth to be lighter i color. Especially in heavy veg or early flower stages

Anyone that can help me with this problem. I notice i had some pretty good amount of light leak in 2 area. The problem has been fix but not my girls. it been about 4 week into flowering and no bud yet. they are growing kinda funny. the top bud area has long vine with little hair on it. long skinny bud formation? can they be retarded from the light leak? will dutch master reverse save them? no sign of hermie. The girls are girl scott cookie. Should i chop them and start new? its looking really healthy and The steam are really thick. have anyone experience this before? Please help

Pix are usually required to diagnose stuff like this. You may just have a really long run sativa. Especially if you are running fluro or LED lighting.

Hey doc I have a medical emergency on my hands now. Had this micro grow going for a while now and my girls should be ready in about a week or two but the browning and yellowing is starting to get rather intense and I dont want to blow it right at the finish line. If you look at the reference photo I have 3 different strains with 2 similar problems and one completely different. I think there may be either a mag or zinc deficiency but its hard to tell because of the intense yellowing and the dark green brown on Big Bang could be a Nitrogen abundance but I cant be sure which is why im consulting the pros. Any feedback will be greatly appreciated.

Them girls are under 2 1000k hps lamp. My buddy had light leak and his girls didnt flower for 2 month so he chopped.Ill try to get a pic. I dont want to use my phone camera.

greencorral19 said:

Hey doc I have a medical emergency on my hands now. Had this micro grow going for a while now and my girls should be ready in about a week or two but the browning and yellowing is starting to get rather intense and I dont want to blow it right at the finish line. If you look at the reference photo I have 3 different strains with 2 similar problems and one completely different. I think there may be either a mag or zinc deficiency but its hard to tell because of the intense yellowing and the dark green brown on Big Bang could be a Nitrogen abundance but I cant be sure which is why im consulting the pros. Any feedback will be greatly appreciated.
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u may need to flush till finish.

greencorral19 said:

Hey doc I have a medical emergency on my hands now. Had this micro grow going for a while now and my girls should be ready in about a week or two but the browning and yellowing is starting to get rather intense and I dont want to blow it right at the finish line. If you look at the reference photo I have 3 different strains with 2 similar problems and one completely different. I think there may be either a mag or zinc deficiency but its hard to tell because of the intense yellowing and the dark green brown on Big Bang could be a Nitrogen abundance but I cant be sure which is why im consulting the pros. Any feedback will be greatly appreciated.
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Cal/Mag deficiency. At this point I would not worry about it too much. Just try to correct for it next time around.

Here is some pic.
seem like its still vegging. flower been that size for week. im using 2 1k hps lamp.

Those look closer to 2 weeks along than 4 weeks. Just starting to set bud sites good. Not a lot you can do other than wait for them.
They look healthy otherwise. Just slow.
Watch for hermi signs (bananas) due to the stress of the light leak.

If i wait another week and they still look the same then should I chop it and start over? what can i do? my buddy had experience that before and he waited 2 month and they still look like 2 week into flower. What will cause them girls not to bud in 2 month of flowering?

Don't pull them and just be patient. They will finish on their own schedule.