nute burn

hi im new here and new at growing in general. i will start off by tell you guys what kind of setup im useing. i have a 18gal bubble hydro kit with 400 watt mh/hps 20in above my almost 3 week old plants. i have been getting great growth from one of my plants(they are white widow btw) i am useing GH flora nove nutes my temp is 76-79 and my humidy is 40-50%. so i have 5 plants total one which is growing awesome. i have roots hanging some almost 15-20 in lol and having great roots from all plants.but 4 of the plants have almost looks like cig burns. im gonna ry to post pics. but since i have one plant doing great and some not i dont know wether or not if i lower the nute strenght if it will affect the one that is doing fine. i am changing my nutrient solution today and im wondering if i should lower nutes raise nutes or leave the same since i have some plants doing good and some not lol sorry so long just cant figure this out the pic all the way to the right and the one and the middle are pics of the good plant

over 50 views and no replies lol could really use the advice im changing my water this afternoon

What's up brother...

You really just need to dump the reservoir and solution out, use hydrogen peroxide in a spray bottle and spray down, wipe clean. You have a couple different nutrient burns going on, so it'll be best to start over from scratch. In this new nutrient solution you mix, make sure that you only feed 1/4 recomended strength to your plants for now. Using a PPM/PH meter and mixing it properly to 400 PPM for now would be great. In a couple weeks it can be increased to 600 PPM or so. I'd also add hydrogen peroxide to this new mix, to reduce bad bacterias & potential algaes. They're just so young right now, and remember, cannabis is a WEED. While it is higher maintainence than most, it can be very sensative at young stages, and requires more care in the sense that it needs a good array of all the nutrients at all times, but not necessarily a STRONG dose of the whole array. Moderation is KEY! It's always easier to notice a slight defeciency and add a lil more, than to add too much and end up with burns, stressing your plant (increasing chance of male/hermaphrodite/seeds), and stunting growth for as little as a couple days to weeks.

Add some carbohydrates to your feeding schedule, too. Organic molasses is the cheapest option if you don't want to go with a carbo solution from the hydro shop or online, and works just fine with hydro in the proper doses. Lots of posts on this site about carbos you can read. I have some threads on it as well that you may find helpful.

well i already changed the solution earlier and cleaned it out. i left it at 1/2 tsp per gallon. i had one plant doing great and i didnt wanna mess that one up to fix the other so i didnt know what to do lol. there was alot of crap on the bottom maybe built up salt and i also ran ph'd water through the rockwool to clean it out. so did i do this right because the back of the gh nutes say that the 1/2tsp dosage per gallon will put it at 300ppm and i dont have a ppm tester but my ph is at 6.0 i couldnt get anyone to answer and have been waiting so went ahead and changed and since i had one plant that was doing good i didnt wanna mess that one up to fix the other lol but im deff a newb i also bought water from the store instead of useing water from the sink. im still having great root growth so do you think i should still change the solutiuon again or should i give it a few days to see hwat happens? and how much molasses do u use per gallon of water?

also if i do have to change it can i just dump out like half of the water adn then add regular phd water to it as long as my ph stays at 5.8-6.0? that way i dont have to waste all that water and nutes?because i just changed the water washed it out and flushed the rockwool out. will that work? also thank you for the reply i would love to get this right i am trying to work my way up to a SOG grow but wanna get a few grow under my belt first lol

newathydro said:

well i already changed the solution earlier and cleaned it out. i left it at 1/2 tsp per gallon. i had one plant doing great and i didnt wanna mess that one up to fix the other so i didnt know what to do lol. there was alot of crap on the bottom maybe built up salt and i also ran ph'd water through the rockwool to clean it out. so did i do this right because the back of the gh nutes say that the 1/2tsp dosage per gallon will put it at 300ppm and i dont have a ppm tester but my ph is at 6.0 i couldnt get anyone to answer and have been waiting so went ahead and changed and since i had one plant that was doing good i didnt wanna mess that one up to fix the other lol but im deff a newb i also bought water from the store instead of useing water from the sink. im still having great root growth so do you think i should still change the solutiuon again or should i give it a few days to see hwat happens? and how much molasses do u use per gallon of water?

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That's good that you changed the solution out and have it @ 300 ppm. If you follow the directions closely, then it should be accurate. Give that new clean solution a few days and see how they react. If it still seems too strong, you can try adding water to what's already in there and maybe some more hydrogen peroxide. Remember that water can evaporate from your reservoir and/or plants can drink very quick leaving a lot more consentrated amount of nutrient deposits. In just a day or two, what was once 300 PPM can be in the 600s. This is obviously a hard task to do without a PPM meter, and hopefully you will realize it's importance and make that good investment.

Your PH is slightly high @ 6.0 ... Hydroponics prefers anywhere from 5.1-5.9, but aiming for the 5.3-5.5 range is going to be best. Typically it rises on you daily.

Molasses, you can go tablespoon per gallon

Did someone say +rep for Mazar??? hemmm ...

yea i dont have ppm meter but its says on back of the bottle of gh nutes that 1/2 tsp makes the nutes 300ppm and like i aid i have one plant that is 2 weeks old and is about 7 inches tall and bout 12 inches wide and has a stem like a big ciggarette lol so it has me all confused. but having my ph at 6 is a lil high? i have already used ph up in my solution because after adding nutes my ph was like 4-4.5 so if i had down will it mess up the nutes or will that be fine? and thanks for the patience this stuff isnt easy and any help is great lol

newathydro said:

yea i dont have ppm meter but its says on back of the bottle of gh nutes that 1/2 tsp makes the nutes 300ppm and like i aid i have one plant that is 2 weeks old and is about 7 inches tall and bout 12 inches wide and has a stem like a big ciggarette lol so it has me all confused. but having my ph at 6 is a lil high? i have already used ph up in my solution because after adding nutes my ph was like 4-4.5 so if i had down will it mess up the nutes or will that be fine? and thanks for the patience this stuff isnt easy and any help is great lol

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6.0 is slightly high. 5.3-5.5 is supposed to be the most comfortable levels for the plants. While you can get away with 6.0, I was also pointing out that the levels typically kreep UP on you daily, meaning that if you maintain it @ 6.0 you're guaranteed to be 6.4-7.0 in no time. Whereas if you bring it down to say, 5.3, you may find yourself checking it the next 24 hours only to find it's risen to 6.0 even like you're currently at, and still an ideal level. This ensures that you're PH levels are always in a comfortable level for your plants. Bouncing between 5.3 to 6.0, back down to 5.3 and so on is MUCH better than 6.0 to 6.7, down to 6.0, you get where I'm going with this right? haha

But ya bro, I know we started on nutes but this is actually good that we're focusing on PH because this is something that can commonly be ignored by newbies as they don't realize the true importance of PH for cannabis. Anyway, hope this helps! Keep the questions flower if you got em!

ok thanks man well i use a liquid for testing for ph so makes it hard i know i need a ppm pen and ph tester but i was wanting to get a grow under my belt lol i changed out my water yesterday and washed out my tank and cleaned my water pump filter and flushed rockwool and they are looking alot perkier today the one that was doing good is probally another inch tall today and has quite a few new branches. which is where i was confused because my new growth looks great and my roots are going crazy. should i be keeping my water levels bout the same everyday? i know you were saying that if water evaporates it will make the solution become stronger so myabe thats the prob i was having. my ph stays pretty stable i ussually dont have to change it exept for when i first make my solution then it stays pretty stable after that. really appreciate this help. sorry bout all the questions lol. also i ordered seeds from cannabis seeds.com and wondering is i got bad seeds since i have one plant doing great and others struggleing they all seem to be doing differnt

dont worry too much about ph in bubblers, i go up to 6.4 without a problem, it fluctuates between about 5.2 and 6.4, if ph stays too low all the time you may get magnesium defficiency.

oh ok well im just trying to igure this out cuz i have one plant that looks awesome and is growing like crazy the other are growing a lil slower and have some burns on them but new growth looks good. so confused on why on plant would be doing so good and others are differnt

newathydro said:

ok thanks man well i use a liquid for testing for ph so makes it hard i know i need a ppm pen and ph tester but i was wanting to get a grow under my belt lol i changed out my water yesterday and washed out my tank and cleaned my water pump filter and flushed rockwool and they are looking alot perkier today the one that was doing good is probally another inch tall today and has quite a few new branches. which is where i was confused because my new growth looks great and my roots are going crazy. should i be keeping my water levels bout the same everyday? i know you were saying that if water evaporates it will make the solution become stronger so myabe thats the prob i was having. my ph stays pretty stable i ussually dont have to change it exept for when i first make my solution then it stays pretty stable after that. really appreciate this help. sorry bout all the questions lol. also i ordered seeds from cannabis seeds.com and wondering is i got bad seeds since i have one plant doing great and others struggleing they all seem to be doing differnt

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Yes, I wouldn't be shocked to find that PPM & PH levels were kreeping up on you daily and causing troubles for you. Many beginners do not realize how much your levels can really change in a day. While it is a process to clean, change, & mix a new solution in a big reservoir. It's worth the 5-10 min it will take you maximum to text, add water/nutes, and then make any final adjustments to make sure everything is in check, MAX! That 5-10 min of maintainence wil make sure that all your previous time, effort, & $ (when you throw away nute solutions, that drains your pocket as well as the reservoir, as you go thru them much faster when u have to swap it out sooner). So stay on top of that stuff and you should be looking fine! Glad the girls enjoyed the switch.

And yes, keep PPMs steady for a bit and then progress. Don't try to jump daily. Lets say you're @ 500-600 PPM this week? Contine that for the next two. Step it up to 750 after that. See how they do for a week or two. If no nute burns (remember, this varies on strain, as some are heavier feeders than others), then you can step it up again. Go for 900-1000. Same thing. Then 1,200-1,300, ... The most I like to feed is towards the very end when plants are large, mature, and feeding heavily is around 1,600-1,800. Some can go higher, but I prefer to keep them lower and if they want to feed more, I'll just increase the frequency of my feeds rather than the strength and give it to em all in one shot. They can only absorb so much at once.