Top leaves turn brown and curl upwards

Hello,

I have a big problem. pH 6.5 feed water feed water 3 weeks after last repot. 1.0-1.1 EC total with GHE flora series. Day 30 of flower.
2 days ago I slept at a friends house and came back seeing this (getting worse):




Thanks
findus

Plants look good.
What you seeing is natural maturation of the leaves and expect to see more
No worries, my friend

Jimdamick said:

Plants look good.
What you seeing is natural maturation of the leaves and expect to see more
No worries, my friend

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Thanks for replying. Bad thing is that they turn brown and get dry. These pics few days old. If i twist the leaves they become dusty...
They don´t look like the normal autumn colour
Like the 14th grow and never had this

Look at this:

Some strains mature differently than others.
It might be normal for that plant. Is it the only one doing it?
The plant look great otherwise.
I wouldn't worry about it personally

Jimdamick said:

Is it the only one doing it?

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No, more and more plants / tops doing this now. I watered today with 1.0 EC and the drain had 0.8.
I will increase the EC anyway I think.

Thanks

Hi Findus,
I would not consider that to be normal...with all due respect to Jim. My first thought was light burn till I looked at the picture. I would not increase feeding. That's not the answer...though I would suggest bumping up Mg. I see dark tips, burning on the edges and interveinal chlorosis. In fact maybe drop the ec of nutes when you add more Mg so the ec stays the same. Just less food and more calmag or Epsom salts...whatever you use.
JD

It looks like a Mg issue to me as well

maybe salt excess in the soil? and this can burn the old leaves. But... your problem its locate only in the top leaves?

The margin curling could be from too low of humidity or possibly heat stress from the light, the brown tips would be from salt buildup/nutrient burn. The other discoloration in the laves from stress or again overfeeding. Some strains like Bubba Kush will get purplish looking leaves in week 6-8.

Hey guys,
thanks for replying! I think they aren´t overfed. I got the problems 7-8 days after the last feeding (0.6EC, after that pure water). Always a good amount of dran, will check the roots as soon as the pot get lighter.

JohnDee said:

Hi Findus,
I would not consider that to be normal...with all due respect to Jim. My first thought was light burn till I looked at the picture. I would not increase feeding. That's not the answer...though I would suggest bumping up Mg. I see dark tips, burning on the edges and interveinal chlorosis. In fact maybe drop the ec of nutes when you add more Mg so the ec stays the same. Just less food and more calmag or Epsom salts...whatever you use.

Click to expand...

Could be Mg or light burn. But I´ve never seen a Mg deficiency looking like that.... Will Add more Epsom and lower the EC.

Rblade said:

But... your problem its locate only in the top leaves?

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Yes that is the problem...

My old leaves look exactly like a potassium deficiency. Maybe they have a huge K def?!

AquaTerra said:

The margin curling could be from too low of humidity or possibly heat stress from the light, the brown tips would be from salt buildup/nutrient burn. The other discoloration in the laves from stress or again overfeeding. Some strains like Bubba Kush will get purplish looking leaves in week 6-8.

Click to expand...

Humidity and temps kinda perfect. Maybe lightburn. I don´t have the typical burned tips from nutrient burn.
The problem always starting at the edges.

Hope i get a good yield. I don´t even have a single gram at home......