Been reading here for a couple months now but haven't had a real reason to post until now. I have a DIY hydro system with 6 plants in it that are on day 24 of flowering. One of them is looking really bad, while the rest are fine. The leaves are drooping badly, it looks as though it isn't getting water or something, even though it is. The crazy part is that the other 5 plants are all fine, which leads me to believe it's not the water. This just started happening yesterday and has gotten much worse since then, in the past 24 hours or so.

They are under a 1000W HPS. PH has been kept at a constant 5.8-6. The res gets changed weekly, with the last change being last Thursday. I use GH nutes (Grow, micro, bloom, koolbloom and floralicious bloom) and have monitored the PPM closely. Nothing has changed at all recently.

Any ideas what is going on here? This sucks.

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couple more pics... There is some white moldy looking stuff growing on the top of the rockwool. It's not like the typical stuff, or the other 5. I don't know if you can see from the pic, it's not that great. Also there's a shot from further back.

The leaves at the tops of the buds are staying upright still, so far.

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is it possible that this plant is closer to the light or for some reason gets hotter

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Hey Uncle Sam,
I am not a pot grower, i just think the girls look pretty... and smell good

Thanks for the response. It is in the center of the light's area, but as soon as I noticed it yesterday, I raised the light about 8 inches. There's a fan blowing right across the tops under the light. Temp at the very top of the canopy is about 82-84. Also, the other plant that is right under the light is fine.

Actually, that other plant is not 100% fine, it has some yellowing on the leaves that has started to develop over the past week or so. The problem plant never yellowed though, so I don't see the two as being related.

that pic is wicked rot. pull the plant and hope it doesn't spread to the others. you need to post pics of the whole setup. looks as if you need more air up top and on the bottom.

I agree, looks like rot or mold starting. Does the light hit there? Does the drip system go right there? I had the similar thing, the roots were actually choked out in the res by the others. I had to pull it. Cut it right out.

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Chiceh
Peace, Love & Weed

Sprinkle some baking soda on that white fungus looking stuff.

Do Not water the baking soda into the rez.

The alkalinity should kill the mold.

Rot? What is rotting, you mean that white stuff on the rockwool?

Here's a pic that should pretty much show how the setup works, and one of the canopy so you can see that the adjacent plants are fine. It's a scrog, so they're all touching each other all over the place. It isn't anything that is spreading to the other plants at all, the limp leaves from the problem plant are intertwined with the healthy leaves of the others.

The plants are on 16 in. centers, and there are two rows of three. Three in front and three in back. It's the front center plant that is in trouble.

I watched when the water came on, or listened rather, for the overflow to start flowing. The problem plants site was already flooded properly, just as they all were, so no blockage.

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Forgot to describe the system.

The whole thing just fills and drains, right to about half inch from the top of the plant site. The roots are hanging in air, no medium except what's in the 3 in. net pots. It works great, have grown plenty of plants successfully with similar setups.

That's obviously the overflow you see there, which goes right into the res through the clear tube. The black tube is the fill/drain.

The sensor for that thermometer is right up in the canopy.

Looks like I will probably have to pull that plant today as it continues to get more and more droopy. The weird part is the stems are still all strong, just all the leaves are completely lifeless. Still totally green though, no brown or yellow.