MArs78 said:

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.

Click to expand...

PrimoClonesCanada said:

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

Click to expand...

Buzzzz said:

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.

Click to expand...

MArs78 said:

Great thanks, and yes I did cover some of the cubes few weeks ago, I’ll
Cover the rest. So should I flush?

Click to expand...

Aqua Man said:

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

Click to expand...

Buzzzz said:

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.

Click to expand...

MArs78 said:

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.

Click to expand...

Buzzzz said:

NP,yes it is exposed to light

Click to expand...

Buzzzz said:

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

Click to expand...

MArs78 said:

Can you please elaborate further on the rocks, you have any images, what size? Are we talking about pebble size?

Click to expand...

Buzzzz said:

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

Click to expand...

Aqua Man said:

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

Click to expand...

Buzzzz said:

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.

Click to expand...

Aqua Man said:

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

Click to expand...