Help Please

Looks like a bit of clawing to me. You can see the new growth has some yellowing at the tips. I ran 4L of RO water through it thinking it was time for a flush but I'm wondering if I did not run enough water through it. I've been feeding it roughly half strength fox farm grow big and cal mg. I think it had been about 3 weeks since I began adding nutes. Should I run more water or do I have to wait until it dries out again? Also I think I may have raised the ph a little when I did the flush, the RO water I used had been consistently testing around 7.0 but when I checked what was left in the bottle it tested around 7.6 not sure why it would have changed.

Should I have run more water through? I wasn't able to determine if you need to add anything to the water for a flush or not. Or am I completely off and it is a different issue?

Would appreciate any help, the plant deserves to be healthy.



Plant is a G13 Haze from Barney's Farm. It's the only one doing this currently.

Container: 4gal
Medium: Promix HP + 20-30% worm castings
Light: 1000w full spectrum led
RH: Has been 55-65% fairly constant
Temp: Has been 24-27 but the last 2 days the room has dropped to 19 and 20 degrees at night.

Let me know any more information needed if any. Thanks again everyone!

Here's the new growth


And the clawing

Looking good.

you don't need to run anything through it, just cut back on the nutes a little.if you're going 50% right now, drop down to 40%...the guide on the bottle is just a suggestion, and a suggestion weighted to get you to buy more nutes

Let it dry well. Then keep going.

Thanks guys I'll keep my eyes on it for now, how often should I be flushing?

Did I do my flush properly?

if you don't over feed, you never need to flush. if you do get salt buildup in your pot, you run 3 to 4 times the pot volume through it nice and slow, then give it a 1/4 strength dose of nutes.

How do I recognize salt build up? I'll water just with distilled water the next 2 watering and go to a weaker nute mix next feeding.

I've been feeding at about 600-700 ppm. Not sure what the correct amount is there are way too many different opinions out there.

Thanks for posting guys I will update again in the morning.

pro mix is mostly peat, PH to around 6.3. doesn't have to be exact, bounce around a little, but stay centered on 6.3.
don't give them plain water. and don't water them again till they need it. the EWC you mixed in is fertilizer in itself, usually something in the 1-.5-.5 range, depending on what the worms have been eating.
i 'm using peat with some extra perlite added, and i feed about 250-300 ppm in veg, in flower i start off at 300 ppm, go up to around 500-600 ppm, then start tapering off till im at 200 ppm the last couple of weeks. and i'll sometimes get signs of overfeeding at those concentrations. this is my garden, fed those strengths. once a week i make up enough water with 150 ppm of cal mag to get 10-15% runoff when i water. that gives them some calcium, and also flushes out the exhausted salts that may be left in your medium. at the rate they usually need water, it ends up being feed, feed, cal-mag to runoff, repeat.

Excellent, thank you for your post Roger.

It'll be a while before it dries out now probably almost a week.

I have 3 others but they aren't showing any symptoms. Would it be a good idea to just water them in the morning (pots were fairly light before I left for work) with a small amount of cal mg added? Then when the G13 is dried out I will get all 4 back on the same schedule?

I'll try the cal mg until runoff on the other 3. Next feed won't be for about a week after tomorrow...

Thank you again, I think I've over researched and now it's all mud and there are too many different answers.

Would just like to provide an update and take the chance to ask somebody to chime in.

Let it dry out mostly and have continued on, just did a light feed consisting of distilled water approx. 140ppm + 150ppm of Grow Big + roughly 60ppm Cal Mg. Total was around 350ppm or so.

Ph was checked at 6.4 give or take to allow for instrument error.

Here is the plant in question:

Can still still the slightly yellowed leaf tips up top which I am only assuming as an amateur that this was nute burn. The clawing seems to have stopped. I noticed a couple leaves at the bottom which you probably can't see in the picture has almost what looks like rubbing marks or lacerations but this is also around the edge of the bucket so I'm thinking it had itself pressed and folded/rubbing on the outside lip of the pot..

Feedback and advice is very much appreciated!!!!

And one shot of the group.

a little overfed, pretty good otherwise. you need to find some kind of tubs to put your pots in so they don't leak all over your tent when you water. that's just asking for pests, and mold and mildew.

Milkycat123 said:

How do I recognize salt build up? I'll water just with distilled water the next 2 watering and go to a weaker nute mix next feeding.

I've been feeding at about 600-700 ppm. Not sure what the correct amount is there are way too many different opinions out there.

Thanks for posting guys I will update again in the morning.

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Stop flushing it so much what are you trying to accomplish by flushing the shit out of it? flush only if there's a problem.

The exception to that is about once a month do what Rodger said above, flush 30% -40% through it, check runoff in and out at that point for best results, good luck!

Roger A. Shrubber said:

a little overfed, pretty good otherwise. you need to find some kind of tubs to put your pots in so they don't leak all over your tent when you water. that's just asking for pests, and mold and mildew.

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Yes I have that vacuumed up just decided to snap shots first I guess. I'm hoping to see improvements this week and I have made my own trays they are just not shown. Reduced the amount of feed like suggested.

Thank you again for posting.

Roger A. Shrubber said:

if you don't over feed, you never need to flush. if you do get salt buildup in your pot, you run 3 to 4 times the pot volume through it nice and slow, then give it a 1/4 strength dose of nutes.

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Good advice. Some people will add something like Clearex instead of low dose nutes, Much depends on why you are flushing.
JD