Purple stems, lime green/yellowish crunchy leafs, brown clawed tips.

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MArs78

MArs78

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Hello growers,

New to this forum and to growing. I’ve been struggling with yellowing, crunchy leafs, with brown tips curled downwards and purple stems. I’m growing black runtz. My environment is sufficient, I use rock wool and Athena pro nuts. Second week of flowers, what can I do. Any all suggestions are welcome.
 
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PrimoClonesCanada

PrimoClonesCanada

Supporter
123
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Hello and welcome to the farm

They aren't looking to happy my friend.
Could be a ph or nutrient problem. But need lots more info to try and help.

I grow organically and don't have any hydro experience, so I'm no expert on the subject.

What is your ingoing ph of nutrient solution and what's your run off ph?

How often you feed and at what ppm/ec levels?

What lights you using and whats your environment like?
Temp, humidity

Looks kinda like a few issues like mag and possibly k, which makes me think it might be ph related, but you also have slight tip burn.

Hopefully some experienced hydro growers will chime in

Good luck with the grow
 
Buzzzz

Buzzzz

442
93
Hello growers,

New to this forum and to growing. I’ve been struggling with yellowing, crunchy leafs, with brown tips curled downwards and purple stems. I’m growing black runtz. My environment is sufficient, I use rock wool and Athena pro nuts. Second week of flowers, what can I do. Any all suggestions are welcome.
It looks like you have cubes just sitting on the table, they won't get roots like that,cover the table with rocks then set cubes on it or more rockwool so the light is blocked,also take plastic and cover the top ot the rocks so you don't get algae,you maybe have fert build up in your cubes.
 
Aqua Man

Aqua Man

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Underwatering likely…

you have way to much light on them for their health at this point.

Looks like drain to waste in small pots and will need to be irrigated many times a day.

Pot size and media?

Nutrients and all additives being used? Including ph adjusters

Watering method, frequency and volume?

Input ppm and ph and output ppm and ph?

Temp and humidity day and night?
 
Last edited:
Aqua Man

Aqua Man

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But first back that light off as far as possible until this get sorted. The light is going to make this worse fast.
 
MArs78

MArs78

25
3
Hello and welcome to the farm

They aren't looking to happy my friend.
Could be a ph or nutrient problem. But need lots more info to try and help.

I grow organically and don't have any hydro experience, so I'm no expert on the subject.

What is your ingoing ph of nutrient solution and what's your run off ph?

How often you feed and at what ppm/ec levels?

What lights you using and whats your environment like?
Temp, humidity

Looks kinda like a few issues like mag and possibly k, which makes me think it might be ph related, but you also have slight tip burn.

Hopefully some experienced hydro growers will chime in

Good luck with the grow
Thanks for helping out. My ph is at 5.4 and the run off is over 6.5. I hand water when cubes get lighter, it’s hard to feed on specific days due to cubes dehydrating at a different pace. Ppm at 1.5. I’m using growers choice 720, at 70%, 738 watts, temp in veg was 80 now in flower 75, humidity at 45-55.
 
MArs78

MArs78

25
3
It looks like you have cubes just sitting on the table, they won't get roots like that,cover the table with rocks then set cubes on it or more rockwool so the light is blocked,also take plastic and cover the top ot the rocks so you don't get algae,you maybe have fert build up in your cubes.
Great thanks, and yes I did cover some of the cubes few weeks ago, I’ll
Cover the rest. So should I flush?
 
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Buzzzz

Buzzzz

442
93
those cubes are really meant to take a clone and flower it in 8 weeks or so and roots aren't a problem. Put a bunch of rocks under them and watch the diff. ,there is no air getting under the cubes and the roots will stagnate,go brown,and die off,I just covered the table with rocks and put the 1 inch cubes into the rocks. You can flush but until the cubes are off the table a bit you're spinning your wheels. JMO
 
MArs78

MArs78

25
3
It looks like you have cubes just sitting on the table, they won't get roots like that,cover the table with rocks then set cubes on it or more rockwool so the light is blocked,also take plastic and cover the top ot the rocks so you don't get algae,you maybe have fert build up in your cubes.
Thanks for your advice, also the plastic are raised up on all the cubes, should they be lowered. The bottom of the cubes is totally exposed.
 
1B1D3582 8B1E 41BE 8887 B6070BE5BB96
MArs78

MArs78

25
3
those cubes are really meant to take a clone and flower it in 8 weeks or so and roots aren't a problem. Put a bunch of rocks under them and watch the diff. ,there is no air getting under the cubes and the roots will stagnate,go brown,and die off,I just covered the table with rocks and put the 1 inch cubes into the rocks. You can flush but until the cubes are off the table a bit you're spinning your wheels. JMO
Can you please elaborate further on the rocks, you have any images, what size? Are we talking about pebble size?
 
Buzzzz

Buzzzz

442
93
Can you please elaborate further on the rocks, you have any images, what size? Are we talking about pebble size?
I just used lava rocks,they are reasonable and retain water in their pores. if you use the hydroton the will float once the table is full,if i grew your style again i would probably put small rounds rocks on the bottom then lava on top,that's just me though,others may disagree
 
Buzzzz

Buzzzz

442
93
I just used lava rocks,they are reasonable and retain water in their pores. if you use the hydroton the will float once the table is full,if i grew your style again i would probably put small rounds rocks on the bottom then lava on top,that's just me though,others may disagree
No images saved sorry,after I did it for a while , I just ran constant drip across a tilted table, it worked better for me as no timer was needed for flooding
 
Aqua Man

Aqua Man

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idk imho i dint think thats the issue but raising them cant hurt i guess
 
Buzzzz

Buzzzz

442
93
idk imho i dint think thats the issue but raising them cant hurt i guess
I dunno, those rockwool cubes are shit and wasteful , they are good for the first while or cloning but they need to be suspended IMO to get better growth and suffocate the roots over time. Run it the way pictured and then put a cube in a net pot with a dripper and see the diff.
 
Aqua Man

Aqua Man

Staff
Supporter
23,145
638
I dunno, those rockwool cubes are shit and wasteful , they are good for the first while or cloning but they need to be suspended IMO to get better growth and suffocate the roots over time. Run it the way pictured and then put a cube in a net pot with a dripper and see the diff.
Yeah i think he has a high amounts of accumulated salts… id be curious to see the pom if he ran just water and enzymes catching the first bit of run off… im feeling like it will be well over 2000ppm.
 
Buzzzz

Buzzzz

442
93
idk imho i dint think thats the issue but raising them cant hurt i guess
I ran tables for years. I had 6 with 72 plants per table,I would flower them as soon as the clones had roots,I think tables are only for very short plants and production as single buds etc.,I also took all the plastic off the cubes and huddled them all so it was one big cube and the roots all shared
 

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