What's causing this?

I suspect she needs a good feed zaQ, rhizo is not enough at 3 weeks.
Have a look for some similar grows and you should get a basic idea of whats needed.
Good luck
:peace:
 
by week three you should be about 1100 to 1300 ppm..........Micro, veg, and cal-mag..

 
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by week three you should be about 1100 to 1300 ppm..........Micro, bloom, and cal-mag..


Hey, thanks. So you would say feed her with some nuts? It looks like shes been grilled under leds, or maybe thats the lack of nuts? My friend said she look great up until 14 days, and then turning yellow and burning on the edge.

Thanks!
 
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Exact same thing happened to ALL my plants.
Switched to HID and it fixed it about a week later. Later on I tried firing the LED again, and plants got burnt. I am testing for the last time, they're in week 3 flowering right, so they're big and strong.
Looking back, I think it was not the light, but growers mistake. The plants that got burnt the second time, still get burnt because of bad feed. My mistake for having 3 totally different plants in the same grow.

One thing that makes sense though.. I contacted Canna (using coco and their nutes) and they told me that I needed to make the plants transpire so that the nute could be sucked in. They were so stunted, that yeah, I think that HID really helped to kick them back to life.

I almost sold the LEDs, keeping my fingers crossed they're good. Check my sig, will subb this thread!

Good luck mate!
 
I think with each lighting source, you'll find there are nuances... LEDS for example... temperatures are lower... and consequently transpiration... I allow my chamber to run a little high temps to compensate...

also, you'll notice a significantly higher use of Cal MG
 
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