Hey Guys,
To start- thank you all for documenting your grows. Reading through the different threads have been super helpful.
I’m currently in my second week of veg, the strain is ILGM super skunk.
I’m having trouble with brown spots and the leaves curling. I know it’s a deficiency of some kind but for some reason I’m struggling to narrow down to what type of deficiency as everything I read points to a cal, potassium, or phosphorus.
I’m growing indoors under a HLG 100 R light
In Canna coco soil
Using ILGM Bergmans lab nutrients
3 gallon pot
Currently feeding at 6.0ph and 750ppms
Any help getting her back healthy again would be greatly appreciated. Here are some pics to show what’s going on.
@561toker hey toker, adjust your PH to 5.8 (5.5-5.8 is acceptable for hydro) up your ppm a bit too probably around 1050 and feed until run off. Don’t let the Coco dry out completely either.
You didn’t mention medium, and what it’s made of, but it looks like coco.
In coco you need to water often, (almost every day) this balances, and keeps the ph in check, as well as provide nutrients needed every day. Coco is inert, and requires additional nutrients.
Water to runoff every day, and feed every day, this should get her straightened out
Pleasure. Go look at a site called coco for cannabis. There is a lot of basic do’s and do nots on that site which will help you along and save you hassles ( and $$$ lol )
The spot coloring looks off to me. Any chance you may have just dribbled some nutrients on it when feeding? That will burn little spots in also. When my ph is off, to low. I will get similar spots but a rust color.
@Not2SureYet - There is a chance of that, yes. I really haven’t watered on the backside though and they still show spots. The new growth that is coming in looks healthy so maybe I did dribble some nutes.
@Goldenboy2316 I measured ph on run off and it was 5.6…my ppm on the run off was up to 1200 which I don’t know how. I have been feeding between 900-1000ppm like @OGIncognito recommended.
Should I run some straight water through it at 5.8ph to wash some of the nutes out?
I would do a flush at 6.0ph. I ph my coco water at 6.0. Know a lot of guys say 5.5 is ok in coco. Never had good results at 5.5 in coco. Also is that just coco mix? No perlite?
I am with @Goldenboy2316 for the ph. I am always safe running a higher ph than a lower. If I get down towards a 5.5 I will see issue pretty quick. Also. I didn’t notice above. Are you feeding every day. Or feed 2 days and water the next? And this is a photo right? There is no real need to be feeding heavy yet. That is just me there. I would be in the 650 range while they are small. They don’t eat to heavy over here till flower. But that could be because I don’t kill them with a lot of light Mine get 60w per plant in veg. And don’t get caught up chasing run off numbers. I know real good about that from when I started out growing. It sounds like you may be feeding to often for those nutes. I have to re look them up and see if they are dry or liquid nutes. It looks like you have good people helping you here though
@561toker Your run off PPM readings are usually a bit higher due to salt ( fertiliser ) building up in the Coco as the plants drink up the water and leave some salts behind. This is why it is essential to feed until about 20-30% run off daily. You can’t over water with coco unless there is really poor drainage or the coco is too compact. If you want to “flush” the salts out, rather mix a lower dose of nutrients and run through the coco until your run off PPMs are acceptable. Stripping the coco (and root zone) of food by pouring plain water through is not good for the plants health due to shock. If you do use plain water, then make sure you feed immediately with your required full strength nutrient mix. Hope this helps!
@Goldenboy2316 Thanks for the heads up. I raised my ph to 6.0 when feeding.
It is just a straight canna coco mix with no perlite. In the next grow would you recommend adding perlite?
@Hogbud that makes sense. I ended up using a light ppm mixture with a higher ph like you guys recommended. Run off finished at 5.9 ph and ppm just over 1k. I think shes responding well.
There are still some brown leafs from before but the new growth seems to be coming in okay.
I’m thinking about topping and if I should do it or not.
@Goldenboy2316 Answered my own question- hindsight I read that I should have used perlite and also buffered my coco with cal-mag for future deficiencies.
Is this where I should start over so I don’t waste nutrients and time for a poor quality harvest or is it still possible for a quality harvest?
This is a photo. So it has plenty of time to recover. It isn’t looking bad right now. It has only been a few days. Coco recovers fast. But it still takes some time
Mine get 60w per plant in veg. And don’t get caught up chasing run off numbers. I know real good about that from when I started out growing. It sounds like you may be feeding to often for those nutes. I have to re look them up and see if they are dry or liquid nutes. It looks like you have good people helping you here though 
