What could possibly be causing this!?!?

arrozkongandulez

arrozkongandulez

Active Member
my best looking plant is 40 days old today, shes about 17 inches tall and has been growing perfectly so far.. she is in a 5gallon DWC system

but lately ive noticed some spotting happening around some of the top leaves as well as some random fan leaves... there is also a very mild yellowing on the top set of fan leaves... she has a DENSE perly white root system and overall looks healthy as shit!

is this nut burn or a calmag deficiency? what is my baby girl trying to tell me?

STRAIN: DinaFem Blue Widow
EC: currently ~270PPM, i gave her about 400PPM (Grow,Boost,SugarDaddy,CaliMagic) 6 days ago during rez change, she ate all up down to about 100PPM 2-3 days later!, shes also been drinking about 1 gallon a day... i usually add some more of Technaflora's BC Grow and some GH CaliMagic bring the PPM up to like 250-300 every day.
TEMP: Ambient temp is about 72
REZ TEMP: 60-68F
HUMIDITY: 40-50%
PH: Everyday i bring ph down to 5.5, whenever i check the next day it goes up to about 6.4ish (since she drinks and eats daily) before i bring down again.

i just dont know why itd be a calMag deficiency since i bring ph down to 5.5 daily and Cal is available frm 5.5-5.8 and then Mag is from 5.8 up!!!:wall::wall::wall::wall::wall:
 

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cannabineer

cannabineer

Ursus marijanus
I'd cut the sugars entirely and add a bit more cal-mag. I am guessing the spots are calcium deficiency. Impressive plant for such low ppm! cn
 
arrozkongandulez

arrozkongandulez

Active Member
cannabineer said:
I'd cut the sugars entirely and add a bit more cal-mag. I am guessing the spots are calcium deficiency. Impressive plant for such low ppm! cn
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Thanks!! im just adding the SugarDaddy cuz im trying to follow the technaflora recipe for success. I have been adding about 3 mls of the calmag every day.... i hope its just that!.

you think i should increase the EC? how much do you think i should give her? ive just been holding back because i kinda burned my other plants when they were ust babies so im trying not to that again... ive never done DWC before so I'm still learning.... but she is eating a lot!

i was originally going to scrog her but she was just too fat and thick to fit lol so i ended up just tying her down as much as i can... i mean even the side shoots are thicker than my other plant's main stems!!

i was going to mother her but i guess im just going to take clones cuz I so cant wait to smoke her!!! lol.
 
cannabineer

cannabineer

Ursus marijanus
arrozkongandulez said:
would she really benefit that much if i added that much more nutrients? instead of rationing it as she needs it?
Click to expand...
For now, I'd add more cal-mag and see what that does. I think you're doing great with unconventionally low ppm because you're staying on top of your plant's needs. I counsel against sudden changes. Jmo.

Taking clones is a very good idea. There can be less correlation than one likes between a plant's vigor and the goodness of its smoke. If you've found the One, then the clones are your pheno in the bank, while you grow the progenitor out and can properly judge her harvest. cn
 
arrozkongandulez

arrozkongandulez

Active Member
cannabineer said:
For now, I'd add more cal-mag and see what that does. I think you're doing great with unconventionally low ppm because you're staying on top of your plant's needs. I counsel against sudden changes. Jmo.

Taking clones is a very good idea. There can be less correlation than one likes between a plant's vigor and the goodness of its smoke. If you've found the One, then the clones are your pheno in the bank, while you grow the progenitor out and can properly judge her harvest. cn
Click to expand...
i just read this HIGH AS FUCK and it felt like this is the wisest thing anyone has ever said to me... lmao

you are a wise man my friend THANKS!:clap:
 
potpimp

potpimp

Sector 5 Moderator
He is indeed a very wise man, a highly underpaid comic and hopefully a future mod. :) Great advice Canna.
 
cannabineer

cannabineer

Ursus marijanus
arrozkongandulez said:
great picture! lol.

so whats the regular convention for feeding this little monster? i dont want to under feed her if she could do so much better!
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People like to push the EC as high as they can, on the general principle that more is better.

However yours is not the first grow I've seen with rather low ppm and a vigorous plant. I have not been convinced that "max tolerated" is "ideal". I read an article for non-Cannabis hydroponics in which half the ideal nute strength still returned 90% max growth. Imo the only real and serious convention is "what works", and I tip my hat for you having shown the independence and the willingness to work ... to find what worked. Jmo. cn

<add> Max growth came at about 80-85% max tolerated EC. I forget if it was tomatoes or arugula ... fast-growing leafy plants rather comparable to our preferred charges.
 
Taviddude

Taviddude

Well-Known Member
Yeah, I agree with ya on most of what ya say, but if your plants are eating up 100-200 ppm per day with Daily PH swings from 5.5 to 6.4 I would up the EC. I know everyone does things different. Even at an 85% ratio you should only have to ph every few days. If you are having to feed, and ph daily it would be less work to go soilless. In my mind Hydro is supposed to be easy. Just seemed like he's really making things hard on himself. Bringing the EC up slowly until the ph swings are down to only a few points over a few days seems like it would put an end to more than problem, make things easier, and I would put myself out there to say the end result would be better.
Just my .02.
Peace.
Tav.
 
^Slanty

^Slanty

Active Member
I agree. He needs to feed more and find a better balance to his setup. He is definitely underfeeding atm and needs to SLOWLY increase his EC/PPM until it balances out more. The plant looks lush and very healthy overall and only good things will come once he meets the plants feeding requirements. I am a huge advocate of the "less is more" theory when it comes to feeding, but his plant needs more.

Day 22 and never been over 700ppm(water is ~200ppm and ~500ppm nutes) in a UC setup:
View attachment 2412150View attachment 2412151View attachment 2412152View attachment 2412153View attachment 2412154
 
arrozkongandulez

arrozkongandulez

Active Member
^Slanty said:
I agree. He needs to feed more and find a better balance to his setup. He is definitely underfeeding atm and needs to SLOWLY increase his EC/PPM until it balances out more. The plant looks lush and very healthy overall and only good things will come once he meets the plants feeding requirements. I am a huge advocate of the "less is more" theory when it comes to feeding, but his plant needs more.

Day 22 and never been over 700ppm(water is ~200ppm and ~500ppm nutes) in a UC setup:
View attachment 2412150View attachment 2412151View attachment 2412152View attachment 2412153View attachment 2412154
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how would i find the "right" balance? i mean i dont think im feeding it more than you are tho.... my water is RO @ 0PPM and i fed her about 400PPM every week add more if she needs to....

but id like to her your opinion as to what level do you think i should feed?
 
arrozkongandulez

arrozkongandulez

Active Member
cannabineer said:
People like to push the EC as high as they can, on the general principle that more is better.

However yours is not the first grow I've seen with rather low ppm and a vigorous plant. I have not been convinced that "max tolerated" is "ideal". I read an article for non-Cannabis hydroponics in which half the ideal nute strength still returned 90% max growth. Imo the only real and serious convention is "what works", and I tip my hat for you having shown the independence and the willingness to work ... to find what worked. Jmo. cn

<add> Max growth came at about 80-85% max tolerated EC. I forget if it was tomatoes or arugula ... fast-growing leafy plants rather comparable to our preferred charges.
Click to expand...

yea im pretty devoted to my plants.... im checking on them at least 1 hour a day make sure everything is top notch.

they're more like pets lol, and the grow room is where i go relax after a long day.

i was just afraid of nute burn again since DWC can be very unforgiving!

i am doing some experiments on other plants too with different additives. but this one seems to be super happy and strong with just the basics...

i guess shes just a Plus Size girl lmao!
 
Taviddude

Taviddude

Well-Known Member
Slowly raise your EC every day by 50ppm until it levels out and only goes down a SMALL bit in a 24 hour period.
Idealy you want your nutrient mix to where your plants take in as many nutrients as water. Say you fill your reservoir and have an EC of 1.0. Your plant is going to drink water every day. If you are over feeding the EC will rise because the plant is using more water than nutrients leaving less water with more nutrients (a more concentrated nutrient solution) so when you go to check your EC after 12-24 hours the EC will go up if you are over feeding.
Your PH may also go down.
On the other hand, if you are under feeding your EC will drop in a 12-24 hour period since your plants are using more nutrients than water.
Your PH will go up.

You want to be able to set your EC, and see only a slight drop (from say 1.5 to 1.4 over say 2 days.
Your PH will not swing around because the concentration of nutrients (which act as ph buffers) stays the same as the water level goes down since your plant is eating nutrients at the same rate that it is using water.

Even a larger drop is fine, as long as your PH levels don't swing up too much. You don't want to be PHing your solution every day. It's not good for your plant. A slow steady rise in PH from say 5.8 to 6.0 in a few couple days is good as it allows your plant to uptake all nutrients at their maximum availability which will ward off deficiencies,

Simply said,
EC rise in 24 hours = overfeeding.
EC drop in 24 hours= underfeeding
EC steady for 24 hours= perfect.

That's how you get your shit dialed in in Hydro.
That's what tells you if a plant wants more feed, or if you are giving it too much.
Movements in EC.

Don't get me wrong man, your plant looks Dope. I just think you are going to drive yourself nuts, and it's easier to learn this stuff right from the start. Makes hydro VERY SIMPLE. Once you get Your EC dialed in you should only have to monitor your system. No screwing with feeding, or daily ph adjustments. You'll have to add some PH down every couple of days, but for the most part the only time you will have to worry about feeding is when your Reservoir gets low and you have to add water and nutrients back.
Hope this helps ya man. Once you learn to Read movements in EC, and PH you'll make a huge leap in hydro.

Peace.
Tav
 
arrozkongandulez

arrozkongandulez

Active Member
Taviddude said:
Slowly raise your EC every day by 50ppm until it levels out and only goes down a SMALL bit in a 24 hour period.
Idealy you want your nutrient mix to where your plants take in as many nutrients as water. Say you fill your reservoir and have an EC of 1.0. Your plant is going to drink water every day. If you are over feeding the EC will rise because the plant is using more water than nutrients leaving less water with more nutrients (a more concentrated nutrient solution) so when you go to check your EC after 12-24 hours the EC will go up if you are over feeding.
Your PH may also go down.
On the other hand, if you are under feeding your EC will drop in a 12-24 hour period since your plants are using more nutrients than water.
Your PH will go up.

You want to be able to set your EC, and see only a slight drop (from say 1.5 to 1.4 over say 2 days.
Your PH will not swing around because the concentration of nutrients (which act as ph buffers) stays the same as the water level goes down since your plant is eating nutrients at the same rate that it is using water.

Even a larger drop is fine, as long as your PH levels don't swing up too much. You don't want to be PHing your solution every day. It's not good for your plant. A slow steady rise in PH from say 5.8 to 6.0 in a few couple days is good as it allows your plant to uptake all nutrients at their maximum availability which will ward off deficiencies,

Simply said,
EC rise in 24 hours = overfeeding.
EC drop in 24 hours= underfeeding
EC steady for 24 hours= perfect.

That's how you get your shit dialed in in Hydro.
That's what tells you if a plant wants more feed, or if you are giving it too much.
Movements in EC.

Don't get me wrong man, your plant looks Dope. I just think you are going to drive yourself nuts, and it's easier to learn this stuff right from the start. Makes hydro VERY SIMPLE. Once you get Your EC dialed in you should only have to monitor your system. No screwing with feeding, or daily ph adjustments. You'll have to add some PH down every couple of days, but for the most part the only time you will have to worry about feeding is when your Reservoir gets low and you have to add water and nutrients back.
Hope this helps ya man. Once you learn to Read movements in EC, and PH you'll make a huge leap in hydro.

Peace.
Tav
Click to expand...
thanks for the help man this post was EXTREMELY helpful. i think im going to try that.

i feel like this calcium deficiency is spreading!!!!! i have been adding about 5 ml of Calimagic every day... but yea the ph always swings from 5.5 to 6.4 everyday... and its because she's eating too much, but she has been drinking a steady amount....

im starting to get worried cuz she had no blemish in any of her leaves!!!! now about 15-20% have brown spots....

could this be because shes eating too fast and theres not enough EC to keep the ph steady so that why the ph always swings so high locking out the Calcium?
 
^Slanty

^Slanty

Active Member
No, it is because you aren't feeding enough and the plant is trying to grow faster than what nutrients are available to the plant. The plant is basically cannibalizing itself to keep up with growth requirements. If you are adding cal/mag every day, what about other nutes?
 
Taviddude

Taviddude

Well-Known Member
Yes sir, the ph swings could definitely cause that. Most likely it's what Slanty said. That's why I kind of reiterated my position on feed. I could see problems eventually. Are you flowering your plant?

Try running straight PH'd water overnight, then start her back on at 1.0 EC and see which way the EC goes in 24 hours. Your PH should be easier to control too.
If it rises, drop it down to 0.9 EC. If it drops try upping it to 1.5 EC. I'll bet it's going to be right around those ranges.
Also, you don't want to add CalMag outside of the proper ratios of your feed schedule or you'll lock out other nutes.
So, don't just go adding a bunch of CalMag without keeping it in ratio with your other nutes.

Try that and I think you'll be happy with the results. It won't fix the damaged parts of the leaves, but all new growth will come in right.

Another little tip on PH ing after a res change is to check it and adjust it twice if necessary.
After you add your nutes and get your ph where you want it (5.7-5.8 ) leave the reservoir alone, and check it 3 hours later. It most likely will change as the water and nutes all get settled in (I don't know the scientific term). After you adjust it the second time it will stick. If it doesn't, still leave it for 24 hours before adjusting because PH up/down will both raise your EC and throw you off if you are watching for movements in EC.
One more tip. If you are using hydroton/expanded clay pellets lower your nutrient solution far enough that it does not come into contact with the hydroton.
About a half an inch below should be good. That stuff is notorious for blasting PH if not prepared properly.

keep Updated.
 
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