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Ok flushed the plants with pure water before the 12 off spell. Come back tonight to find, the leaves looking just as dead or dieing and weird growth on one of the buds, that I nipped off, but hope it wasn't a hermie. These plants have survived spider mites and various other ailments, and now...

Thanks for the reply, the first post showed burn from the light source after I sprayed them. The last three has me baffled, the leaves are hanging limp and lifeless about half way up, and are turning yellow. some of the leaves display the claw, and when the soil is a little drier I guess a...

Hi, new issues developed seemingly overnight. In the fourth week of flower now, and the leaves seem to be taking a kicking, seems to be centred on the middle up. It's affected most of the plants, some are displaying yellow leaves with dark patches as shown, and others are dark rust coloured...

Cheers dude, could well be that. Seemed to come up not long after the spray so makes sense. The PH is 7, and I have been frying them with too many nutes, so your suggestion seems most likely. I'll check on her later, and see how she's looking.

Plant has just gone into 12 hours natural light and 12 hours dark. Sprayed it recently with bi-carb due to what I suspect was mildew. Anyway today these brown spots have appeared on the newest growth. Any ideas? Cheers

Dark green leaves, clawed ends, brown spots, that eventually become holes. Is this nitrogen toxicity, or plants to close to the light source, or both? Will just add the spots start of darker green before turning brown, some of the dark green streaks are visible before they turn. Cheers

The soil is Bio Biz light mix btw.

Cheers, flushed them, the leaves are brown and withered, but new growth is coming through, so lesson learnt I think, might be able to save a couple of them. Thanks.

Gave them weak nutes with cal-mag and the problem has not improved. The seedlings growth has screeched to a halt, and the new leaves which are taking an age to come through, are cmoing through yellow. Tried an epsom salt foliar feed, but I honestly have no idea what to do now. Anyone? Cheers

Cheers, have done, will wait and see. PH 6.5

Moved under HPS to see if situaton improves as still in first 2 weeks, can't give any nutes, but no new leaves are developing. Think I've fucked it, but no idea how, will see if the pot dry out a little more and then try some cal-mag, as I'm out of ideas.

All the seedlings afflicted now, and no progress in growth over night. Any ideas, never seen this type of damage before.

You'll be fine, most growers have made the odd error like this, but as a one off, this shouldn't affect anything.

Cheers, I've moved the light to about 18 inches, and will give its next shift at this range with the 300 watt led. All of the plants are showing symptoms of the yellow leaves, starting in the middle of the first pair and then spreading outwards. Got me stumped.

Will check the PH, but never had problems with the water in the past. The soil id from the hydro store and has perlite mixed in. Will put under the HPS for the next 18 hour shift and see if the problem worsens/improves. This may answer the problem regarding the light. Thanks for the response.

No nutes, growing in soil. I noticed the stretch as well, but kept the light high, as I thought I may be bleaching the leaves.

Hi, I'm trying a 300watt led for the first time, the light is positioned about 30 inches above the plants as per manufacturers spec. However the plants's leaves are starting to yellow in the middle, and the leaves appear to be relatively small. Any ideas, as I'm considering just going back to...

Another plant is now just starting to show signs of the same thing, I've flushed both plants and just crossing my fingers now, as I have no idea what is up.

Problem not getting better, and black spots spreading to leaves higher up. Still only affecting one plant, all the others cool. Any ideas, or is this plant fucked? Cheers again.

Thanks for the ideas, I haven't used the bug spray, but will use some cal mag. Cheers