Nitrogen Mayday!

Well if its too much N, you'd never know it by looking at the plants because they are suuuuuper yellow. It used to be just the older leaves on the one plant, but it has now progressed to the leaves around the buds and the edges are starting to turn yellow. Rhizome told me to feed according to the label, which would explain the high PPM. I read around and found that in flower you can feed up to 2K and its not too bad. There's no signs of nute burn and its been 5 days, so IDK. I just don't want my plants to consume themselves anymore, they've got about 3.5 weeks to go still!

Rhizome - My roots are sitting in a little bit of water, about a half inch or so, due to poor bin design and the fact that I broke one of my new ones during the mayhem from a few days ago. The roots are pretty black but I think its just from the LK because they've looked the same since I started using it. They don't smell or anything. The res is about 70 degrees. I quit using the Hanna because I ran out of reference solution, so I've just been using the liquid kit. I haven't tried foliar feeding because I am in flower and I thought spraying the plants when they were flowering is bad because of mold? My humidity stays low around 30%.

Anyway to get that water out of there?

LK shouldn't turn roots black- stain 'em from pure white, sure... but not turn em black.

Foliar feeding in flower is not as bad as allowing everything to die.

This yellowing- is it even across the leaf? Do the veins remain green?

Well, the roots aren't really black black, but they are definitely stained a dark color from the LK. I don't suspect the roots because they pretty much look the same as they always have. There's really no way to get the water out other than fix my bins, but I was hoping to do that after harvest. My flower room has some serious design issues but I don't think its possible to change everything that needs to right now while its up and running. Also, the yellow started when I was using the new bins where all the water drained, so I don't think its part of the issue, but I could be wrong.

The leaves turn completely yellow, from the edges in, and stay that way for a day or two, then shrivel up completely and turn brown.

Running CalMag?

No I don't use Cal Mag. Should I? I use tap water and thought it was only necessary if you use RO or distilled water.

The yellowing " from the edge in" followed by the sudden mortality is making me wonder (strongly) about a calcium def.

You pretty much always want to use Calmag w/ PBP, unless your water is signifigantly Ca hard.

Drop the superthrive, too- it'll delay finish.

I would have a look at one of the troubleshooting guides- don't have links handy, but googling " jackerspackle" will get you to the old OG version.

I don't think that your problem is N.

I'll try and pick up some Cal Mag today. Thanks a lot Rhizome!

Don't just throw chemistry at it- look at the guides and see if the pics match what you're seeing.

Lotta things will cause yellowing.

DJ - Just because you are putting nutes into your reservoir doesn't necessarily mean that your plants are taking up those nutrients. They could be locked out. This is often caused by pH issues.

Just for the hell of it, take some of the water that is sitting in the bin and check the pH. Knowing your run-off pH should give some more insight into what your problem is.

PC :smokin:

I did the Jackerspackle thing and it told me overfert. I am pretty confident that pH is not the problem. I check it pretty often and its always within range. However, I will check the bin pH once the lights turn on tonight and see what it says. I think I am going to try to change the res again and not put in as much nutes so my PPM is a little lower.

The pictures of calcium deficiency I have seen don't really match what I see on my plants. The edges of the leaves in the pics of Ca deficiency look burnt and almost rusted, where as the yellowing I am seeing is a straight, bright, solid yellow throughout the whole leaf, and then the leaf will shrivel and die within a day or two.

The more I read, the less idea I have of what the problem really is.