Rockwool Hugo 6' puzzle

[AloeRuss]

Been growing in coco for a long while.
Picked up another location built for growing in Hugo cubes.
Nothing difficult, so I stuck to it.

Location has 2 rooms. Room A is being flashed and Room B is starting week 7.
I feed both rooms with the same formula (about 1200 ppm - 5.8 hp)
Temperatures in both rooms at 79 and humidity at 50.

There are two sectors on a long table in room B that has plants that are burned almost completely. The area in between those two sectors (right in the middle is green and not even near to being burned.

How does it happen? If it would be ph or ppm, everything would be looking burned but it's only in two areas?
Please help me understand this.
Thank you.

 

[AloeRuss]

Nobody?

 

[holy]

How are you watering them.. Flood and drain or drip dtw?

 

[doams]

Nobody?

well from my experience dried up leaves like that might be coz dem roots are drowning/overwatered.

try to flush and ensure proper water flow inside pots and that water is not blocked/trapped in some parts of the pot. proper leak zone at the bottom of the pot is very important oherwise parts of the root zone drown and as a result some leaves or parts of the plant dry overnight just like that. If the ph is right it must be root issues imho.

edit: so you are using grodan cubes was mistaken and thought dem plans are in coco.. know nothing about growing in grodan cubes so nevermind.

maybe a big picture of your setup would help to identify the problem?

 

[AloeRuss]

That is what I am trying to do.

 

[AloeRuss]

I just have them on a table and top feed them daily.

Only one thing that came to mind is this:
If I top feed Rockwool I need to make sure it is fully dranched and saturated with the feeding solution.
When top feeding them whoever, there is no easy way of telling "ok. It is fully wet" like u could tell in coco and if runoff appear on the bottom of the cube doesn't mean it's been thoroughly saturated.
Is it possible that some of them are not getting socked through and through?
That would explain the randomness of the problem.

 

[doams]

well definitely looks like the problem is in the root zone.
maybe someone more experienced with grodan cubes could tell you more all my experiments with grodans ended up catastrophically like all seedlings died after a week lol. but was using the smallest cubes which was probably the problem.. never bothered to try again.

 

[holy]

Check that your drippers aren't clogged.. If the flow rate decreases, ppms will build up really quick and cause a slew of problems..

 

[AloeRuss]

I don't have droppers. I feed the plants with the watering wand.
I never made a big deal about the amount of food (or water) that goes on the top of the cube when I feed. When I would see the runoff, I would feed for another 5 seconds and call it a day. Maybe I did not add enough water from the top causing PPM to build and burn my plants.
Thoughts please.

 

[holy]

Interesting.. Are they all clones of the same plant or different strains? How often are you watering? I've seen best results while watering to runoff 4-6 times a day in rockwool.. I used to do once per day but saw way better consistency and health with higher frequency..

 

[jaystray]

You should check your PPM and PH about every 3 to 4 days. Run your PPM at about 900 and your PH 5.5 to 5.9 . If you are top feeding have some run off then check how heavy they are then let them dry out a bit and feel how lite there are. If your root are brown the you are over watering. Give them a flush with about 600 PPM PH 5.5 If you have a high PPM I never go over 1500 ppm You don't need High PPMs to get good Bud.

 

[AloeRuss]

Thank you Jay
Out of all my pleas for help on every board, yours was one of very few that made sense.

I just harvested the most awful, smallest and lightest bud I ever encountered.
I grew in coco for years but this was first in cubes.

Jay. Would you be able to validate some things for me?
It sounds strange but you are the only one I know who made sense.

 

[Principante 8]

More pics or else even the most experienced growers will just be guessing at best...

 

[Principante 8]

How many plants are we looking at ? If just one, maybe you forgot to water in one day and it dried out too much.. If more than one the guess would be different.. Maybe a pathogen in the root zone.

 

[AloeRuss]

I have about 65 plants with about random 20 just burned crisp.
I never had to worry about root zones in coco.

I don't mind having this to worry about but right now I don't know what to look for.
The picture up on top showes one of the crispy one.
Something went majorly wrong but I don't even know what. And why.

More pictures I can provide when I am on location.

 

[jaystray]

AR What are you feeding them GH OR HG or AN what is your food so we can get a profile. I run GH 7/14 Micro And Bloom Ph to 5.5 to 5.9 if want to do a bloom boost just give it more bloom like 16 or 18 for a day or two. then back down to 14. keep a eye on the ph and PPMs
don't let it get over 1300 or 1400. I will run them at 600 for two day at a higher ph so you get the Mg in the plant on a low PPM like 5.9 to 6.1 then back to a 7/14 at 5.5 to 5.6 Keep your room at 75 to 80 deg and hum at 65 to 70 % up to 5 week in flower then drop it to 50to55% your last week run it at 45%. With your watering water 2 times a day first water is 30min before light on then 6 hr later. With a 6x6 1min is fine or when you see run off I see it at 1min this is with a top feed with a dripper with a good flow not hard. If you need more help I will check in.

 

[resinryder]

My question is when was the last time you flushed the cubes? RW tends to collect salts that will block the feeding process and can cause nute deficiencies that look like the plant is burning up. I ran RW for years and salt buildups was about the only major issue that caused what yours look like. May not be your problem but thought I'd ask.