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Leaves keep rusting, need help

growbud420 39 Replies 2,918 Views
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Page 2 of 2 · Replies 21–40 of 40
#21
Oh bud ditch the neem oil
You can’t wash it off & it leaves a foul taste
Lucky so far it’s only the leafs that go sprayed still I wouldn’t use the trim
Rust is a rose disease
It’s extremely rare like really extremely rare to appear on cannabis
 
#22
I water them heavy the last couple because my humidifier took a crap and amazon is slow, lol
Typically they get 1 gal each watering.
 
#23
So here's my dilemma
I have to leave for the holiday for 3days. Should I feed them ... even tho they were just watered or leave them to dry out ?
The leaf damage pictured is 48hrs old.

Also
Could I do a foliar spray ?
 
#25
I always get the best results using a complete line of soil and nutrients from the same supplier. Their soil and amendments are formulated to work together so reason tells me that’s going to work better than me trying to “make it better” by adding a bunch of extras. I use my soil right out of the bag and that has given me the best growing experience.

I’m not smarter than the companies that produce these products so I trust their recommendations. That has worked for me both with liquid and now organic growing.
 
#26
Just saw that you said you’ve been watering them heavily at 1 gallon per application which is one of the likely causes of the drooping leaves like the three in the back. If you’ve been going hot on the water just water them until you get a little runoff. I’d be willing to bet you’ll see runoff at around 1/2 a gallon. When you overwater, it’s bad for your plants health but it’s also bad for your media health because you’re flushing out vital nutrients.
 
#27
Gmix said:
Oh bud ditch the neem oil
You can’t wash it off & it leaves a foul taste
Lucky so far it’s only the leafs that go sprayed still I wouldn’t use the trim
Rust is a rose disease
It’s extremely rare like really extremely rare to appear on cannabis
Click to expand...
That stuff is a mess. 🤣
 
#28
TheGoldenRoad said:
Just saw that you said you’ve been watering them heavily at 1 gallon per application which is one of the likely causes of the drooping leaves like the three in the back. If you’ve been going hot on the water just water them until you get a little runoff. I’d be willing to bet you’ll see runoff at around 1/2 a gallon. When you overwater, it’s bad for your plants health but it’s also bad for your media health because you’re flushing out vital nutrients.
Click to expand...
Roger that, makes perfect sense
 
#29
I see you have a humidifier working while the plants are struggling to release the excess water. When theyre droopy like that due to overwatering I think you should turn off the humidifier. Are you meassuring temps and humidity?
 
#31
You should also clean your spill trays after every watering. If there are salt crystals building up in the trays, you will be pushing it back into your plants every time you water it. Makes it a lot easier to test ppm, pH, etc too.
 
#32
Sorry to see the result of 100 days of veg. None of them looks healthy and vibrant or big. That's a drag and I feel for you.
I admit I'm suspicious of those airpots. What's it like watering them? Does water come out the holes when you water? How do you know if the soil at the bottom is wet? How long until they dry back? Just exploring possibilities. I hope we can get you dialed back in.
 
#33
Budtirement said:
Sorry to see the result of 100 days of veg. None of them looks healthy and vibrant or big. That's a drag and I feel for you.
I admit I'm suspicious of those airpots. What's it like watering them? Does water come out the holes when you water? How do you know if the soil at the bottom is wet? How long until they dry back? Just exploring possibilities. I hope we can get you dialed back in.
Click to expand...
They are a challenge, but they keep roots from becoming bound. Water immediately drains that's why I let the pans fill up and wick from the bottom. They go from saturated to dry in about 48-72hrs depending on RH
 
#34
growbud420 said:
They are a challenge, but they keep roots from becoming bound. Water immediately drains that's why I let the pans fill up and wick from the bottom. They go from saturated to dry in about 48-72hrs depending on RH
Click to expand...
Thats way too long for the water to sit there, if it doesnt absorb in a few hours its too much water. By the time the top substrate is dry you will still have your lower roots soaking wet. That can cause problems in the leaves, sometimes due to root rot.
 
#35
You seem like you got them figured out but it does seem like a lot of work and kinda new-fangled so I guess I'm still looking at them askance. Your the second person with airpots having issues that could be do to watering that I've seen on here this week.
 
#36
With airpots and textile pots, but specially airpots since they have holes, you need to water slowly. It seems that youre being impatient and instead youre watering the top and letting the bottom water itself with the excess water. Get you some clay pebbles/arlite and put it on the plate below the pots, that will give a barrier of air in between the roots and a hard surface. I personally put a couple fingers of arlite on the bottom of the pots to have the drainage system inside but you can also put them outside on the plate. You will never have problems again with watering but you need to water slowly man, if you dont wanna water that slow get you textile pots, same problem but not as ball breaking.
 
#37
Also youre making it more difficult without knowing, your water leaks so easily because you have dry pockets. When the substrate is not watered patiently the water will slide in dry pockets inside the pot, much like it does when the top part is dry and you need to wait for it to soak the water but deeper in the pot. Poor watering methods give you more headaches than they save you from.
 
#38
growbud420 said:
Skittlez strain
Long veg cycle 100 days so far.
Ocean forest soil
Water Ph between 6.2 and 6.5
Soil Ph 6.8
Calmag 120ppm
Also has hyd lime ammendment

I continue to trim leaves and adjust Ph and calcium. Using neem in case is was rust mold.
Any ideas ?

I have 4 girls in the tent but only this one has this issue.
View attachment 2344509View attachment 2344508
Click to expand...

What's your runoff ppm?. From your Pic the rusting is because of potassium deficiency and phosphorus deficiency. Maybe due to all the calcium you put in.
 
#39
Eledin said:
Thats way too long for the water to sit there, if it doesnt absorb in a few hours its too much water. By the time the top substrate is dry you will still have your lower roots soaking wet. That can cause problems in the leaves, sometimes due to root rot.
Click to expand...
I may not have explained that correctly. They wick runoff fairly quickly....a few hours. When soil is fully saturated it's 48-72 hrs to dry. I do understand what you mean tho. I'll make adjustments.
 
#40
Update on Skittlez

You all were right, she was starving. Switched to Fox Farm Buds & blooms and fed her heavy...till tip burn.
She's much better now.
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17400642201775710345336961776814

Thank you all for your advice.
 
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