Please help with this spots!

Hi!
Having some problems with spots on the tip of my "first finger" leafs on my 3 week from seed plants.

I saw them the first time yesterday, and hassen't changed sense then.

They are living outdoors, on my balcony. So i suspect some kind of pests, but I can't see any on the leafs (underside as well). Sines this is my first grow I'm not sure of how to treat the problem.

Here are some pics.


Please help determine the cause, so i can treat my ladies!
More info on the grow can be found hear or in my journal.
https://www.rollitup.org/grow-journals/346150-lowlife-autos-blueberry-lemon-skunk.html

It looks like a calcium deficiency to me.

W33DTU2TLE said:

Hi!
Having some problems with spots on the tip of my "first finger" leafs on my 3 week from seed plants.

I saw them the first time yesterday, and hassen't changed sense then.

They are living outdoors, on my balcony. So i suspect some kind of pests, but I can't see any on the leafs (underside as well). Sines this is my first grow I'm not sure of how to treat the problem.

Here are some pics.
View attachment 1058362View attachment 1058363

Please help determine the cause, so i can treat my ladies!
More info on the grow can be found hear or in my journal.
https://www.rollitup.org/grow-journals/346150-lowlife-autos-blueberry-lemon-skunk.html

Click to expand...

Have you foliar fed your plants with any nutrient solution during the day in the sun. Cause those spots look like nute burn. Or if thats a no then check into having potassium defiency. You may think that you are giving it adequate amounts of potassium when in reality it gets locked up easy by high salinity wheter it be in your water or other nutrients

I don't foliar feed them. But they might gotten some 1/3 strength (2ml sensi grow (a+b), 1ml b52, voodoo juice) om them. Can't say fore sure..
But i think they are a little pale, gave them some 1/2 strength now. (3ml sensi grow (a+b) 1,5 ml b52 voodoo juice.) I keep PH between 5,8 and 6,2. Flush when "medium water" are of more than ,5 pH. (suck some solution up from the bottom of the pot)
And when i flushed i also use sensi zyme and a little bit piranha.

AN are known to have a low salt buildup, but i don't got a EC tester so i can't that for sure. But i flush often. so i think I'm ok in that aria.

All my leaf tips are healthy, so i know I'm not over feeding, but can i be underfeeding? Gave them more food moments ago. half strength. But could thy take more feeding? Craving bloom nuts instead of growth? (no sign of flowers just leafs at stem) (LowLife clams bloom starts a 3 weeks from seed, witch is tomorrow).

[EDIT]
All but one (spotted) are growing a second set of 3-finger leafs. If that is a sign of anything?
The big lemon skunk has yellowish / pale vanes on 1-finger leafs.
All pots have been given the same amount, and strength nutrient solution.

Had spots like that on one of my auto ak-47's early in life, they simply cleared up and that plant ended up becoming the biggest/strongest . So id say dont worry about it