Fox farm trio issue

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Ayokiwi717

Well-Known Member
So we're on week 6 and starting to notice some issues. Two of the plants have nitrogen toxicity im pretty sure. The one worst than the other. I noticed some yellowing at the bottom of my taller plants as well. This may have been do to low nutrs. I gave three quarter of a dose last time to two of them because of them turning light green and some yellowing. What you think of the plants? Some issues, but not the worst? So should I cut back on grow big for the two with nitrogen toxicity? I see grow big seems to have most of the nitrogen. Any issues you see with my process. These are autoflowers. I'm watering for 5 min before I check ppm. I have my notes posted. I'm feeding each time so far since ppm have been dropping. Low dosage depending on what plant is showing.
 

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cannabiscrusader

cannabiscrusader

Well-Known Member
Just give it plain water next couple waterings. Fox garm trio builds up salts in the media, looks like you are on the verge of a ph issue from salt residue. Work in a plain watering once a week after that
 
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Ayokiwi717

Well-Known Member
cannabiscrusader said:
Just give it plain water next couple waterings. Fox garm trio builds up salts in the media, looks like you are on the verge of a ph issue from salt residue. Work in a plain watering once a week after that
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How comes ppm keep dropping tho? So it looks like the plants are eating? Is that nor a good way to tell when to feed? Ppm are dropping to 200 sum ppm which is pretty low for flowering right?
 
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Ayokiwi717

Well-Known Member
cannabiscrusader said:
Just give it plain water next couple waterings. Fox garm trio builds up salts in the media, looks like you are on the verge of a ph issue from salt residue. Work in a plain watering once a week after that
Click to expand...
cannabiscrusader said:
Just give it plain water next couple waterings. Fox garm trio builds up salts in the media, looks like you are on the verge of a ph issue from salt residue. Work in a plain watering once a week after that
Click to expand...
Wouldn't it not be eating and ppm staying around the same? Sorry I'm just getting conf
cannabiscrusader said:
Just give it plain water next couple waterings. Fox garm trio builds up salts in the media, looks like you are on the verge of a ph issue from salt residue. Work in a plain watering once a week after that
Click to expand...
I cut back on on the other two, and gave no grow big which has the nitrogen in it. I hope that fixes the issue.. I guess we'll see how this progresses. I even water with plain water for 5 minutes before giving nutes. So I try to keep salts from building. Do you guys think the nitrogen I'd the culprit? Do pot plants need less nitrogen in the flowering stage? Why are people reporting ppm of 800 for autoflowers meanwhile most of my autoflowers never exceed 700ppm at a given time. Most of the time ppm hang around 400-600 range then drop when I test them when they need water. I haven't grown for two years so kind of rusty. I was rusty to start
 
cannabiscrusader

cannabiscrusader

Well-Known Member
Plants definitely use less nitrogen in bloom, after week 3-4. But they still need some. The grow big is too much that late in flower, causing the toxicity. The leaves are also clawed down, also indicating N toxicity. So stopping the grow big at this point is the right move.
Even if you water plain before feeding, you are still feeding every watering. Regardless of the plain water beforehand, salts are still sitting in the pot every time. Although you do leech some of the deposits out, you replace them immediately giving the root zone no time in-between to help absorb it or break it down further.
Your ppm will go down, because it is still feeding on p and k mostly. Lose the grow big after week 4, and work in some plain watering without feeding at least once a week
 
DeadHeadX

DeadHeadX

Well-Known Member
The droopy leaves on a couple plants looks like over or underwatering. Those are pretty small plants, so they should really only need a fraction of the recommended doses of nutes. 3/4 is likely too much, or at least work you way up to that much. I’d recommend trying dry amendments rather than ff next go round. Make sure you’re letting the pots dry between waterings. Overwatering can turn leaves yellow also. I’d flush and then start back with 25% recommended nutes or so.
 
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Ayokiwi717

Well-Known Member
cannabiscrusader said:
Plants definitely use less nitrogen in bloom, after week 3-4. But they still need some. The grow big is too much that late in flower, causing the toxicity. The leaves are also clawed down, also indicating N toxicity. So stopping the grow big at this point is the right move.
Even if you water plain before feeding, you are still feeding every watering. Regardless of the plain water beforehand, salts are still sitting in the pot every time. Although you do leech some of the deposits out, you replace them immediately giving the root zone no time in-between to help absorb it or break it down further.
Your ppm will go down, because it is still feeding on p and k mostly. Lose the grow big after week 4, and work in some plain watering without feeding at least once a week
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Ok. Week 4 of life or flower? So it won't be bad to water with plain water even tho ppm are down? I'm trying not to overdue it, or under do it lol.
 
cannabiscrusader

cannabiscrusader

Well-Known Member
Flower. The plant doesn't need much N after the stretch, just enough to keep the leaves green. Any more, the leaves get dark green. That's when you know to back off the nitrogen, before they get dark green is better but you will dial it in. Too much N in flower is toxic, locks out other nutrients, and gives you airy whispy buds. Nobody wants that
 
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Ayokiwi717

Well-Known Member
cannabiscrusader said:
Flower. The plant doesn't need much N after the stretch, just enough to keep the leaves green. Any more, the leaves get dark green. That's when you know to back off the nitrogen, before they get dark green is better but you will dial it in. Too much N in flower is toxic, locks out other nutrients, and gives you airy whispy buds. Nobody wants that
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I have airy buds alot. Lol. My stuff is good and works, but ya never dense. Could be because im using a 320w light for 4 plants. Really my light i think is good for only 3 plants. Looks like the one plant has calcium defiency. The one tall one may need nitrogen. Leaves kind of look light green. The tall one seems to consume more nutes
 

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cannabiscrusader

cannabiscrusader

Well-Known Member
Ayokiwi717 said:
I have airy buds alot. Lol. My stuff is good and works, but ya never dense. Could be because im using a 320w light for 4 plants. Really my light i think is good for only 3 plants. Looks like the one plant has calcium defiency. The one tall one may need nitrogen. Leaves kind of look light green. The tall one seems to consume more nutes
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Looks like you are reading your plants just fine. Make a specific mix for each plant. I'd go only 1/4 strength of the grow big in the fading plants, and 3/4 bloom. This late in flower, the plant likely won't recover those faded leaves, but you will stop the progression.

Raise those smaller plants up to the canopy. That will help you maximize your lighting. Definitely consider adding a second fixture. Even with 4 plants, the ones directly under the light shouldn't be effected. Get those plain waterings in, and some amendments for the next run. Handful of extra perlite never hurt anyone either
 
sfw1960

sfw1960

Well-Known Member
Seems most of the "mainstream" stuff you can cut in HALF and be safe. They just want to see you at the ¢a$h register sooner.

I had similar issues with the GH trio but I don't buy that anymore because MC is pretty inexpensive and I even run that at less than recommended strength.

I've been making mini risers for the elevator feet on the 3D printer also for the inevitable runt of the litter too - just stack a few elevators with the risers in-between.
 
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