Plants dying off

[Lubby7]

Hey guys! Hope your good!
First time posting so be nice haha
So I’m looking for some help if possible! I’ve done a few grows in the past roughly 6, all with soil all have been great. Thought I’d step it up a bit and do a grow in coco haha. They started amazing and grew quicker than any other grow I’ve done! I then done a fairly heavy defloration ( no more that 40% of fan leaves ) and put them onto 12/12. One didn’t look so good and looked like in was somehow burning so lowered the nutes but the first one died. Now the 2nd has gone too I’m down to 2 plants which do look healthy! But a couple leaves are doing the same sort of thing. I’m using PH perfect sensi bloom for coco and I’m doing the recommend dosage and I’ve even gone a week or so with lower dosage ( I’ve never gone above what the chat says on the BudLabs app. I’m just scared to loose another one! Any help would be very much appreciated! TIA

[Captain Beefheart]

gis a few stat`s bach feeds ...temps ect.

[Lubby7]

So there barneys farm critical kush seeds.
I mix 32ml of part A and 32ml of part B of the sensi bloom nutes and 16ml of B52 and 16ml of voodoo juice in 8litres of water. Watered everyday about 500ml ( was about a litre per day when in veg and light was on 18h ) pots are always light before watered.
Temps admittedly do get fairly high, hottest probs 34 degrees but like I said my previous 6 grows have never had a problem with the heat. I have a 400w light connected to a carbon filter and got a fan in the tent and a fan outside the tent to move air but when the lights on I struggle to get the temps down without getting an AC unit and like I said temps have never been a issue before.... But this is the first time With this strain and also first time with coco so could be that...

[Captain Beefheart]

I only read the first sentence bach, u basically av fried the dope I'm really fuked rite now but imo ffs run twice the volume of ph'd water through them and then feed away base ferts only at a ec of 1.2 fuk me sideways and good luck

Great Googly Moogly

[Cave Hill Cole]

Are you checking the EC after you add your nutes? If not, you definitely need to get an EC pen. Are you adding your nutes in the correct order? Sometimes if add things in the wrong order (like silica) you can mess up your nutrient ratio. There are plenty of videos on youtube on how to do mix them correctly.

I agree with @Captain Beefheart. Flush your plants with some PH water. Then start with a nice simple nutrient solution (just your base nutes like A&B) no greater than 1.2EC. That will hopefully give you a "reset". If you want to help the shock your plants are going through. Get hold of some aloe vera powder..and mix in half a teaspoon per litre. The salicylic acid does wonders for plant recovery IMO, is kinda like aspirin for plants. I would cut away all the old dead growth if you haven't already.

with regards to your heat issue..have you got room to add an additional horizontally mounted tower fan? It can add another level of cooling...its not AC but hey..at least its something affordable you can add for cooling.

Good luck brother!

[Minty]

Welcome Lubby7 mate, you should be in good hands here, lots of people always willing to help a buddy out mate.

One didn’t look so good and looked like in was somehow burning so lowered the nutes but the first one died. Now the 2nd has gone too

From what I am learning while being on this forum is that what looks like burning (on your first picture at least):-

image.png

can be caused by the plant being underfeed just as much as overfeed (as I understand it the plant is effectively eating itself to get nutrients). I don't totally understand it myself and I am still learning so will call on my mentor @2-Scoops as to what he thinks as he certainly knows much more about this than I do but if your underfeeding is not working try feeding them? If they respond then you know you are on the right track.

[Minty]

Sometimes if add things in the wrong order (like silica) you can mess up your nutrient ratio.

Can you expand on this one mate as I add silica last - is that correct or not? I find it fucks with pH so would rather it went in last but makes no difference to me unless it has to be added before CalMag anyway?

[Cave Hill Cole]

Sometimes if add things in the wrong order (like silica) you can mess up your nutrient ratio.

Can you expand on this one mate as I add silica last - is that correct or not? I find it fucks with pH so would rather it went in last but makes no difference to me unless it has to be added before CalMag anyway?

Sure thing mate, according to Dr Coco (over at coco for cannabis) he suggest adding your silica first and then waiting an hour before adding the rest of your nutes, as per the video in the link below. Apparently there is a chance is can bond to other molecules if you don't. A lot of other people seem to back this up.

https://www.youtube.com/watch?v=NzpI856 ... l=DrMJCoco

[Minty]

Sure thing mate, according to Dr Coco (over at coco for cannabis) he suggest adding your silica first and then waiting an hour before adding the rest of your nutes, as per the video in the link below. Apparently there is a chance is can bond to other molecules if you don't. A lot of other people seem to back this up.

Thank you mate, I have always been suspect of the Silica as it has such a drastic effect on the water/nutrients I am adding it to (i.e. I extract a jug outta the res and add silica to that) but when say I reuse the same syringe I used for Flora Micro it goes mental ;o) So knew something was not quite right...

[Minty]

https://www.youtube.com/watch?v=NzpI856 ... l=DrMJCoco

Watched it and not convinced. Gonna continue doing it the way I was.