Can anyone help me diagnose this?

Darknes01 · Feb 21, 2020

Hi guys,
I have some weird brown spots on some of my leafs on 1 or 2 plants out of 12. so i cant figure out what it could be, if they all had it ok but why only 2 to 3 plants showing this?
also what the heck is this ?
RDWC setup with ec of 1.7 ph 5.9 water temp 63 and using Southern AG

fragileassassin · Feb 21, 2020

They look almost like theyre turning purple?
Could be phosphorus, cold, or just genetics.

Darknes01 · Feb 21, 2020

fragileassassin said:
They look almost like theyre turning purple?
Could be phosphorus, cold, or just genetics.

Can't be the cold since they have seen some really really cold days and never had this color.
Also they are northern lights auto flower.
I feed them Lucas formula plus calmag and have another setup indoors with same formula for feeding with no issue but different strain( San Fernando OG)
I'm at a loss here

fragileassassin · Feb 21, 2020

Could just be a different phenotype that has slightly different needs if theyre all from the same seeds and only a few are doing it. It might not like the colder water temp. Ive nearly always seen purple that wasnt supposed to be there blamed on phosphorus or cold and the two share a pretty close connection.

Darknes01 · Feb 21, 2020

fragileassassin said:
Could just be a different phenotype that has slightly different needs if theyre all from the same seeds and only a few are doing it. It might not like the colder water temp. Ive nearly always seen purple that wasnt supposed to be there blamed on phosphorus or cold and the two share a pretty close connection.

Is there a phosphorus supplement I can give?

fragileassassin · Feb 21, 2020

Are you or planning on using any kind of PK (bud) booster for flower? Or a line that changes ratios during flower?

BrewerT · Feb 21, 2020

I honestly don't think its anything other than genetic expression. If the plants are trucking away and seem fine, it looks more like a blemish or lack of chlorophyll in those acute areas. Nothing to be to concerned with mate. Keep an eye on it, and if it gets worse I would call a pot doctor

Joking aside, it isn't anything to freak about.

fragileassassin · Feb 21, 2020

BrewerT said:
I honestly don't think its anything other than genetic expression. If the plants are trucking away and seem fine, it looks more like a blemish or lack of chlorophyll in those acute areas. Nothing to be to concerned with mate. Keep an eye on it, and if it gets worse I would call a pot doctor Joking aside, it isn't anything to freak about.

I thought this at first too but couldnt find any pictures of any NL autos with purple fan leaves. After another search I am seeing some mentions of it on forums.
So yeah, could also be just that phenotype with some slightly different traits.
I did want to explore it, but I also think you should just watch and wait at this point.

Gond00s · Feb 21, 2020

1100 ppm is quite high prob a unbalance

Darkoh69 · Feb 21, 2020

Im with fragileassasin on this one. Its the cold.

Can anyone help me diagnose this?

Darknes01

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fragileassassin

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Darknes01

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fragileassassin

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Darknes01

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fragileassassin

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BrewerT

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fragileassassin

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Gond00s

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