Yellowing between veins during flower after a burn

[Kazue00]

Hey guys I got a gal in coco nearing week 9 from germination (auto). I recently burnt her. Probably from salt build up and too high of an EC. (Info below) I flushed the hell out of her and gave her a feeding at around 400 EC. Didnt seem to burn her again but I did notice yellowing in between the veins on the top leaves on some bud sites. Can anyone help me figure out what's going on ?


Seedman strawberry cheesecake auto
9 weeks from germ
growing in 20% perlite 80% coco
using fox farm ferts:
2.5 mL grow big
5 mL tiger bloom
20 mL big bloom
I dilute to around 600 EC normally
6.0-6.1 pH
Twice daily hand feeding at 10am and 10pm
Always water until run off
Feeding once a week and using tap water at 530 EC between.
Temp around mid 80s, humidity at 35-45%
Growing in a space tote with a Viparspectra 300W light about 4 inches away from top of buds

I've been using 3 mL of calmag for almost the whole grow until lately when I got that burn. I heard hard tap water should have enough calmag in it and my calmag is a 2-0-0 so I cut it out to avoid burn from the N. Was adding the calmag to RO water and using that between feedings before I swapped to tap. And since they stopped any kind of stretching I figured the N from grow big and tiger bloom would be enough.

I only see this yellowing on 3 of the many colas. Two of them are the tallest. So at first i thought maybe heat stress or light burn. However the cola closest to the light has no yellowing. And one of the colas that does have yellowing isnt as tall as the other ones.

Hopefully someone can steer me in the right direction I'm at a loss here. Everything was going soooooo perfect until I burnt her. Was so proud of my gal haha. Now I just want to make sure she finishes up. Buds are starting to fatten and make a nice smell. Some of the pistils have started to turn orange.

Thanks in advance guys. I've always come here for my problems since most other forums and reddit are full of bro science and ass holes. Everyone here has been great.

 

[f-e]

You water twice a day, but only feed once a week? I'm surprised they're still alive.
Your reading isn't EC so I can't say anything about that. Except an EC over 2.0 is unusually high. So it's some sort of ppm reading to be in the hundreds.
The burn looks like P deficiency to me. I'm surprised I'm not seeing a lot more problems though. In coco, you feed every time.

 

[Kazue00]

You water twice a day, but only feed once a week? I'm surprised they're still alive.
Your reading isn't EC so I can't say anything about that. Except an EC over 2.0 is unusually high. So it's some sort of ppm reading to be in the hundreds.
The burn looks like P deficiency to me. I'm surprised I'm not seeing a lot more problems though. In coco, you feed every time.

Sorry so 0.6 EC . Correct me if I'm wrong but dont auto flowers typically use alot less nutrients? I've seen people say 1/2 or a 1/4 less than normal. When she went into flower I fed her at 0.7 ec and it made alot of burnt tips. I've found so much conflicting info on coco. Some people say feed every single watering and some say once a week or every other day. She had been a healthy fast growing amazing looking plant feeding once a week for a long time until I swapped to flowering nutes and fed her a little above her normal EC.

 

[Kazue00]

These are some of the other colas. Aside from burnt tips they look fine

 

[Kazue00]

The more I look at deficiency pictures the more I see what you mean. I'll try giving her nutes at every watering.

 

[pongster]

In coco, you feed every time.

I've found so much conflicting info on coco. Some people say feed every single watering and some say once a week or every other day.

I'll try giving her nutes at every watering.

no two ways around it brother, in coco you feed everytime. =)
never plain water
best wishes

 

[Kazue00]

no two ways around it brother, in coco you feed everytime. =)
never plain water
best wishes

Damn. My first time doing coco and only my second grow overall. Thanks. Definitely learned my lesson. Hopefully she can recover !

 

[Thegermling]

Sorry so 0.6 EC . Correct me if I'm wrong but dont auto flowers typically use alot less nutrients? I've seen people say 1/2 or a 1/4 less than normal. When she went into flower I fed her at 0.7 ec and it made alot of burnt tips. I've found so much conflicting info on coco. Some people say feed every single watering and some say once a week or every other day. She had been a healthy fast growing amazing looking plant feeding once a week for a long time until I swapped to flowering nutes and fed her a little above her normal EC.

Yes you’re right. Autos use less nutrients than photos. I would lower your feed a little. That is nutrient burn. Some autos are picky some aren’t. Just like photos.
Yo can treat coco like soil but you will get soil results. Treat it like hydro and you get hydro results. My drip feeds until runoff every 8 hours in veg. Same in flower.
How close is your light? I think I see some bleaching on the leaves too.

 

[Kazue00]

Yes you’re right. Autos use less nutrients than photos. I would lower your feed a little. That is nutrient burn. Some autos are picky some aren’t. Just like photos.
Yo can treat coco like soil but you will get soil results. Treat it like hydro and you get hydro results. My drip feeds until runoff every 8 hours in veg. Same in flower.
How close is your light? I think I see some bleaching on the leaves too.

Makes sense. Light is bout 4 inches away

 

[Thegermling]

Sorry meant my drop feeds until runoff every hour in veg or flower

 

[Thegermling]

Makes sense. Light is bout 4 inches away

Raise it to like 10 inches if you can. Don’t worry man we’ll help you out.

 

[Crippler]

Damn. My first time doing coco and only my second grow overall. Thanks. Definitely learned my lesson. Hopefully she can recover !

Keep going - it only gets better my friend. The more grows you do the easier it gets. Someone once told me that gardening was a long boring process (I disagree) but it taught me to be more patient and sometimes just doing nothing for a day or two and observing can teach us a lot. Good luck.

 

[Kazue00]

Raise it to like 10 inches if you can. Don’t worry man we’ll help you out.

Wish I could but I built a space tote for super cheap and it's all i have for now. Made a ghetto scrog but its about the furthest i can have them from the light :/ hopefully I'll get a tent eventually

 

[Kazue00]

Keep going - it only gets better my friend. The more grows you do the easier it gets. Someone once told me that gardening was a long boring process (I disagree) but it taught me to be more patient and sometimes just doing nothing for a day or two and observing can teach us a lot. Good luck.

Thanks man this community has been great! I totally feel ya on it not being boring. It's actually really therapeutic to me. Definitely enjoying it

 

[TanzanianMagic]

Hey guys I got a gal in coco nearing week 9 from germination (auto). I recently burnt her. Probably from salt build up and too high of an EC. (Info below) I flushed the hell out of her and gave her a feeding at around 400 EC. Didnt seem to burn her again but I did notice yellowing in between the veins on the top leaves on some bud sites. Can anyone help me figure out what's going on ?


Seedman strawberry cheesecake auto
9 weeks from germ
growing in 20% perlite 80% coco
using fox farm ferts:
2.5 mL grow big
5 mL tiger bloom
20 mL big bloom
I dilute to around 600 EC normally
6.0-6.1 pH
Twice daily hand feeding at 10am and 10pm
Always water until run off
Feeding once a week and using tap water at 530 EC between.
Temp around mid 80s, humidity at 35-45%
Growing in a space tote with a Viparspectra 300W light about 4 inches away from top of buds

I've been using 3 mL of calmag for almost the whole grow until lately when I got that burn. I heard hard tap water should have enough calmag in it and my calmag is a 2-0-0 so I cut it out to avoid burn from the N. Was adding the calmag to RO water and using that between feedings before I swapped to tap. And since they stopped any kind of stretching I figured the N from grow big and tiger bloom would be enough.

I only see this yellowing on 3 of the many colas. Two of them are the tallest. So at first i thought maybe heat stress or light burn. However the cola closest to the light has no yellowing. And one of the colas that does have yellowing isnt as tall as the other ones.

Hopefully someone can steer me in the right direction I'm at a loss here. Everything was going soooooo perfect until I burnt her. Was so proud of my gal haha. Now I just want to make sure she finishes up. Buds are starting to fatten and make a nice smell. Some of the pistils have started to turn orange.

Thanks in advance guys. I've always come here for my problems since most other forums and reddit are full of bro science and ass holes. Everyone here has been great.

I agree that you have to feed more frequently.

I would start at a low EC, but feed every watering, considering this setup of coco and perlite, neither of which hold on to nutrients very long, especially if they're watered twice a day.

Start with a total PPM (tapwater plus nutrients) of 700, every watering. If you see good results, slowly work up to 800 PPM.

Also, I prefer using 50 PPM (0.1 EC) of epsom salt, instead of CalMag.

The symptom looks like Magnesium deficiency, but that's just a function of the fact that the plant is using more magnesium during early flowering.

But the underlying problem is the frequent watering between the feedings.