Any idea what these crunchy leaves are from?

[Username85]

So some of my larger fan leaves, and even smaller leaves have some crunchy spots and I’m not sure what from.
I have 2 plants growing in Happy Frog soil (3gal fabric pots) under a Spider Farmer SF-1000 (12” from plants).
Watering schedule has been water, water, feed (tiger bloom 1.25 tsp>gal) each plant getting about 3/4 gal at a time. Last feeding was 5/15 and fed because the plant with my crunchy leaf issue was showing signs of being under watered-had watered 5 days prior (5/10)
So saying that I don’t think the problem here is overwatering or nute burn, does anyone have any ideas?
Plant on the bottom of first pic is the one most affected, plant at top of pic only has a few crunchy spots like that.
I have to run a heater from the outside of the tent through my intake fan, could it be from the hot air?
I placed a barrier so the hot air doesn’t hit the plants directly, but maybe it’s still somehow affecting them.
I also have a few stationary fans set up inside the tent to move air around, could it be too much for them?

 

[StatesidePromos]

I see 3 things here
1. Looks like nute burn or lockout but could be caused by pH being off. Needs to be flushed.
2. What's your pH?
3. What's your temp and humidity? If you're running heat into it are you doing any compensation for humidity loss?

 

[JimmiP]

I would ditch the tiger bloom. I would not flush it.
I would topdress the soil with Fox farms Ocean Forest, to the top of the pot. Then get some 10 gallon fabric pots just like the 3 gallon pots you have them in. Those plants are getting too big for three gallon pots. And also the happy Frog won't carry you through but the Ocean forest will. Fill the bottom of the ten gallon pot with Ocean forest (or some other good organic mix) then set the three gallon pot inside of it and fill in the sides to the top with more soil. The roots will grow right through the sides and bottom of the three gallon pots. Then flower them. All you will have to do at that point is water them, when they need it.

Have you checked for pests? There looks to maybe be some mite activity on some spots. The pictures aren't clear enough for me to tell for sure.
As to the heater, if it's not too hot in there and the plants aren't getting hit directly, I wouldn't worry about it being the cause. The fans don't seem to be harming the plant that was pictured in its entirety. But direct and constant blowing can cause some wind damage. By the way what temperatures are you running at?

Most of the damage that was pictured was on older leaves and the younger leaves appear healthy. So I think a lot of it might be the plant just taking what it needs from them to feed new growth.
Good luck friend!

 

[Username85]

I see 3 things here
1. Looks like nute burn or lockout but could be caused by pH being off. Needs to be flushed.
2. What's your pH?
3. What's your temp and humidity? If you're running heat into it are you doing any compensation for humidity loss?

I always forget info haha.
Ph is between 6-7. I only have a drop tester at the moment and best I can figure based on water color is between 6-7.
I’m actually getting my deionized water so I can calibrate my ph meter tomorrow.
Temps and humidity are nice and steady 78°/41% lights on, 73°/38~41% lights off. I had flipped to 12/12 maybe 4-5 days ago

 

[Username85]

I would ditch the tiger bloom. I would not flush it.
I would topdress the soil with Fox farms Ocean Forest, to the top of the pot. Then get some 10 gallon fabric pots just like the 3 gallon pots you have them in. Those plants are getting too big for three gallon pots. And also the happy Frog won't carry you through but the Ocean forest will. Fill the bottom of the ten gallon pot with Ocean forest (or some other good organic mix) then set the three gallon pot inside of it and fill in the sides to the top with more soil. The roots will grow right through the sides and bottom of the three gallon pots. Then flower them. All you will have to do at that point is water them, when they need it.

Have you checked for pests? There looks to maybe be some mite activity on some spots. The pictures aren't clear enough for me to tell for sure.
As to the heater, if it's not too hot in there and the plants aren't getting hit directly, I wouldn't worry about it being the cause. The fans don't seem to be harming the plant that was pictured in its entirety. But direct and constant blowing can cause some wind damage. By the way what temperatures are you running at?

Most of the damage that was pictured was on older leaves and the younger leaves appear healthy. So I think a lot of it might be the plant just taking what it needs from them to feed new growth.
Good luck friend!

I haven’t noticed any pests, I’ve dealt with all kinds during outdoor grows so I hope I’d be able to spot them at this point. Honestly though the 10 gal pots may be a problem for my setup. I’m using a 3.5x3.5x8 grow tent, it’s already a bit cramped in there as is, not sure if I’d be able to swing the 10 gal. Temp and humidity have been stable for me, just switched to 12/12 4-5 days ago; lights on 78°/41%, lights off 74°/38~41%
Is there anything else I can do to help em if I can’t get them in bigger pots?

 

[JimmiP]

Well I would get it warmer in there. like around 82-84. And I would run higher humidity than that.

I would still go with the bigger pots. There's plenty of room for the pots I'm talking about. This is the base of the same type of ten gallon pot that you have in the three gallon size. I just happen to be filling one tonight.
And since you like FF stuff you might give them a dose of Fox Farms Big Bloom and some fish emulsion.
But seriously I would give them more root space. Bigger roots means bigger plants with bigger buds.

 

[JimmiP]

Well I would get it warmer in there. like around 82-84. And I would run higher humidity than that.

I would still go with the bigger pots. There's plenty of room for the pots I'm talking about. This is the base of the same type of ten gallon pot that you have in the three gallon size. I just happen to be filling one tonight. View attachment 4904202
And since you like FF stuff you might give them a dose of Fox Farms Big Bloom and some fish emulsion.
But seriously I would give them more root space. Bigger roots means bigger plants with bigger buds.

With those pots in the center you could train the plants to fill the space as they stretch and do just fine.

 

[Username85]

Well I would get it warmer in there. like around 82-84. And I would run higher humidity than that.

I would still go with the bigger pots. There's plenty of room for the pots I'm talking about. This is the base of the same type of ten gallon pot that you have in the three gallon size. I just happen to be filling one tonight. View attachment 4904202
And since you like FF stuff you might give them a dose of Fox Farms Big Bloom and some fish emulsion.
But seriously I would give them more root space. Bigger roots means bigger plants with bigger buds.

I’m ordering the fabric pots and ocean floor soil now. Any idea how many packages of the ocean floor id need to fill the pots? I’ve never worked with pots that big before lol.

 

[JimmiP]

I would get two of the Ocean forest 1.5 cubic feet Baggs. It's a little more than you will need but it's always nice to have a little extra around. I don't know where you're at but it's normally available somewhere locally. I usually get mine at Farm and Fleet. I'd think shipping would be high on a bulky thing like that.

 

[Username85]

I would get two of the Ocean forest 1.5 cubic feet Baggs. It's a little more than you will need but it's always nice to have a little extra around. I don't know where you're at but it's normally available somewhere locally. I usually get mine at Farm and Fleet. I'd think shipping would be high on a bulky thing like that.

Placed the order, thanks for the advice. Unfortunately all the local places to me seem to only have garbage Miracle-Gro type soils, bought some in the past when first starting and the soil was filled with bugs right from the jump haha. Through Amazon I was able to get free shipping on the soil. Won’t have everything here until Monday though, so at least gives me time to prep and make sure.
Do you keep your plants on risers of any kind?
I have my pots in drip trays, but I’m trying to think ahead in case the new ones won’t fit.

 

[JimmiP]

Placed the order, thanks for the advice. Unfortunately all the local places to me seem to only have garbage Miracle-Gro type soils, bought some in the past when first starting and the soil was filled with bugs right from the jump haha. Through Amazon I was able to get free shipping on the soil. Won’t have everything here until Monday though, so at least gives me time to prep and make sure.
Do you keep your plants on risers of any kind?
I have my pots in drip trays, but I’m trying to think ahead in case the new ones won’t fit.

Yes, I keep them off of the floor a couple inches. For drip trays I just use old plastic tote lids. You can use untreated 2x4 scraps to to keep the pots off the floor.

 

[ntg908]

I had a very similar issue this past grow, ended up being light/heat stress, if its on top growth mostly or leaves that arent shaded by others. The lower almost completley yellow leave seems like notrogen lockout as it will move from the lower leaves (turning them yellow), to the newer growth to try to help.

 

[Bsmoke78]

I’m ordering the fabric pots and ocean floor soil now. Any idea how many packages of the ocean floor id need to fill the pots? I’ve never worked with pots that big before lol.

Amazon 95 bucks 3 bags

 

[Romulanman]

Amazon 95 bucks 3 bags

For 3 bags of 1.5cuft FFOF? I hope I'm reading that wrong but that's insane. No bagged soil is worth that much.

 

[Bsmoke78]

For 3 bags of 1.5cuft FFOF? I hope I'm reading that wrong but that's insane. No bagged soil is worth that much.

Yup get it maybe 10 bucks cheaper by going to the plant store

 

[JimmiP]

I get it for indoor stuff at $16-20/bag. Then I reuse it all in the compost pile every spring. Then mix it in with the larger planters in the hoop house.