Is this Phosphorous deficiency? Lime green growth, red/purple stems, bronze spots

FML is all I can say.

Organic grow, switched to flowering 3 days ago. Everything had gone perfectly up until now. About a week or so ago all new growth is bright green, I notice bronze spots. Stems had been purple/red for a while but now it's extending to the middle of the leaf lines (I don't know what they are called). Growth has come to a sudden halt. I feel that months of work are about to go into the trash can.

My research indicates it's phosphorous deficiency. Can someone please help me out.

ps. Initially I thought it was N deficiency so I gave an organic plankton supplement that is high in N and it backfired and resulted in N tox. You can see the lower leaves are dark green, shiny and clawing. Plus slightly burned tips

Was the soil pre cooked/loaded with lime or some sort Mg? The one pic all i see is yellow,is it the light doing that?

myke said:

Was the soil pre cooked/loaded with lime or some sort Mg? The one pic all i see is yellow,is it the light doing that?

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Yes it was pre cooked with lime. Not sure about the light, I had moved it close but put it up a a good few inches again to see if it's that.

No I’m asking if your light is making your plant appear yellow. What’s your light? Can you take a pic with natural light?

Also how long has that plant been in that pot?

More info on food,do you top dress with something ? EWC?

Most certainly light bleaching but need more info to give proper help. Raise your light to the absolute top and let the plant recover. I would keep it at the absolute top and raise the humidity.

Don't follow manufacturers numbers. Follow the plant, it's very easy to get light bleaching with powerful LED panels.

Wastei said:

Light bleaching. Raise your light to the absolute top and let the plant recover.

Your light is way to close. Don't follow manufacturers numbers. Follow the plant, it's very easy to get light bleaching with powerful LED panels.

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Yes,missed the pic with the light in it.For sure too close if at full power.Explains all that yellow.

myke said:

No I’m asking if your light is making your plant appear yellow. What’s your light? Can you take a pic with natural light?

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This has been a long growth, I think 4 months now. Some pics under natural light

Wastei said:

Most certainly light bleaching but need more info to give proper help. Raise your light to the absolute top and let the plant recover. I would keep it at the absolute top and raise the humidity.

Don't follow manufacturers numbers. Follow the plant, it's very easy to get light bleaching with powerful LED panels.

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It's a TS1000, a pretty weak LED but it was at like 11 inches I think in the pics and 100% power. I guess I already ruined the plant since light bleaching reduces potency

Keep up with top dressing.Plant looks good,I dont see any N tox that you mentioned.Led lights seam to use up Mg a lot.Makes sense work a plant hard they need more food.A transplant to a bigger pot would sure help her flower out.

myke said:

Yes,missed the pic with the light in it.For sure too close if at full power.Explains all that yellow.

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SamRD said:

It's a TS1000, a pretty weak LED but it was at like 11 inches I think in the pics and 100% power. I guess I already ruined the plant since light bleaching reduces potency

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It's not all about the total wattage. It's what diod and at what rate they run and at what distance. You'll find the same diods in all wattages, ranges and sizes. It's better to think in terms of watts per square feet than total wattage.

11 inches is way to close for any LED panel. Just raise it and let them recover. There's so many new growers totally ignoring this or they don't even spot it. I think you're on the right track, I think you got the right eyes for this hobby. Cheers and all the best of luck!

SamRD said:

This has been a long growth, I think 4 months now. Some pics under natural light

View attachment 4950958View attachment 4950959View attachment 4950960View attachment 4950961

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run that light at about 20in above canopy and I would give her a little nitrogen. I had the same issue one time

Thanks for the help. I have raised the light to let the plant recover, top dressed with some lime and adding a slight bit of nitrogen