Any ideas?

I have 2 plants that are the same age, in the same size pots, same soil and using plain water for feeding. One looks great and this is the other one. All the new growth is kind of yellow and the tips of the leaves are brown.
I adjust the PH of the water when I feed them to between 6.0 and 6.5 but the soil PH always reads close to 7.0 by the time of the next watering.

The tips of the leaves on my other plants looked like that until I cut the light back to 18/6 so I plan on doing that today for these. I just haven't encountered the yellowish looking new growth before.

Is that a clone or is that a seedling?

Well from what I can see she looks like you might have hit her with a little too much nutes. I see signs of nute burn in the lower growth (which is still green) and yellowing at the top. I'd say give her a good flush and then hit her 1/4 strength. You caught it quick enough, she should bounce back nicely.

stoner84 said:

Well from what I can see she looks like you might have hit her with a little too much nutes. I see signs of nute burn in the lower growth (which is still green) and yellowing at the top. I'd say give her a good flush and then hit her 1/4 strength. You caught it quick enough, she should bounce back nicely.

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my thoughts exactly.

glassblower3000 said:

my thoughts exactly.

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It's a clone that I've had for a little over a week.
It can't be nute burn (i don't think))because I haven't given them any nutes yet. I was planning on starting them on nutes at the next feeding but now I'm not so sure.

Dezracer said:

It's a clone that I've had for a little over a week.
It can't be nute burn (i don't think))because I haven't given them any nutes yet. I was planning on starting them on nutes at the next feeding but now I'm not so sure.

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Well if you haven't fed yet my next question is what type of soil are you using? If you are using any sort of pre-nuted soil (such as Miracle Grow, or Scotts) than it might be to hot for her. If your not using pre-nuted soil, I'm still going to say that she is burned. Probably just hit a "hot spot" in the soil pushing out roots.
Now depending on what type of soil you have her in is how you should approach this. If she is in non-nuted soil than just follow through with the flush as planned.

If she is in pre-nuted soil (time released) than there is really two schools of thought on how to approach this. The first and what I would recomend is to let her go pretty dry, then water deeply, and repeat. throughout. The MG has time released nutes everytime you water, so by letting them get nice and dry between waterings you cut down on the amount of nutes released.

The other way to approach it and what works better for larger plants in MG is to flush really well first, and then let the soil get nice and dry.

Hope this helps.

stoner84 said:

Well if you haven't fed yet my next question is what type of soil are you using? If you are using any sort of pre-nuted soil (such as Miracle Grow, or Scotts) than it might be to hot for her. If your not using pre-nuted soil, I'm still going to say that she is burned. Probably just hit a "hot spot" in the soil pushing out roots.
Now depending on what type of soil you have her in is how you should approach this. If she is in non-nuted soil than just follow through with the flush as planned.

If she is in pre-nuted soil (time released) than there is really two schools of thought on how to approach this. The first and what I would recomend is to let her go pretty dry, then water deeply, and repeat. throughout. The MG has time released nutes everytime you water, so by letting them get nice and dry between waterings you cut down on the amount of nutes released.

The other way to approach it and what works better for larger plants in MG is to flush really well first, and then let the soil get nice and dry.

Hope this helps.

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Thanks. I'm using Fox Farm soil (ocean forest) and I try to let all of the plants get dry before watering. Once I read your reply though, I think when I watered the two newbies last time this one wasn't dry and I just gave it a little to have the meter read the same as the Green Kush. Maybe that screwed it up or something.
Both plants will be ready by tomorrow for water so maybe I'll flush this one just in case and water the other one as usual. I'll wait until next watering to start Veg nutes too just to be certain.

Dezracer said:

Thanks. I'm using Fox Farm soil (ocean forest) and I try to let all of the plants get dry before watering. Once I read your reply though, I think when I watered the two newbies last time this one wasn't dry and I just gave it a little to have the meter read the same as the Green Kush. Maybe that screwed it up or something.
Both plants will be ready by tomorrow for water so maybe I'll flush this one just in case and water the other one as usual. I'll wait until next watering to start Veg nutes too just to be certain.

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Fox Farm has great soil, but it can be a little hot for newly rooted clones. I'd go ahead and flush at the next watering. Ocean farm should have enough nutes to feed her for a few weeks. If it were me I'd give it 2-3 weeks (after she went into that soil) before I start hitting her with veg nutes. Lookin good bro, nice eye to catch that.

Dezracer said:

Thanks. I'm using Fox Farm soil (ocean forest) and I try to let all of the plants get dry before watering. Once I read your reply though, I think when I watered the two newbies last time this one wasn't dry and I just gave it a little to have the meter read the same as the Green Kush. Maybe that screwed it up or something.
Both plants will be ready by tomorrow for water so maybe I'll flush this one just in case and water the other one as usual. I'll wait until next watering to start Veg nutes too just to be certain.

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I dont use soil but I have read that fox farm is not the best soil for seedlings or clones, you need to wait until they are more mature to handle that hot of a soil.

stoner84 said:

Fox Farm has great soil, but it can be a little hot for newly rooted clones. I'd go ahead and flush at the next watering. Ocean farm should have enough nutes to feed her for a few weeks. If it were me I'd give it 2-3 weeks (after she went into that soil) before I start hitting her with veg nutes. Lookin good bro, nice eye to catch that.

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Thanks!
These are only the second pair of plants I've ever grown so I'm a total noob. The first pair are in flower right now and looking awesome. I burnt a couple leaves by not getting to them right after the lights came back on. they grew so much in the dark period that they were touching the lights so when everything came on it burnt a couple leaves a little. Other than that though it's gone really smooth so far and I hope it stays that way.

I just fed the big girls and flushed the little ones with airated water that was adjusted to 6.0. I waited 15 minutes and checked the soil ph and it's now at about 6.5 and 6.7 for the two of them. I guess I'll give it a couple days and see how it reacts.

As far as the soil being hot. I used the same soil for the other two plants and they were just fine. The Green Kush is doing really well too so I wouldn't be so sure about that.

I read here on RIU earlier today that a Zinc deficiency can look just like that and that it can be caused by the ph being too high and causing lockout. that's why I flushed with a low ph to try and bring it down.