First Grow. Strange symptoms.

Hi
These are 2 weeks old and havent reached 8cm. I find that odd.
Do you guys have any ideia what the LIGHT GREEN stain on the edge of the leaves are?
I though maybe Nitrogen def., but I think they're too young for an NPK deficiency. I have no clue.

Wassup dude. If they're getting enough light then you shouldn't worry about height, some strains are real lowriders. That could be a nitrogen deficiency. I use guano for nitrogen, a little bit is good for a long time. You can give them small amounts of nutes in a week and it will boost them up. Good luck.

Iron (Fe) - Starts with interveinal chlorotic mottling of immature leaves and in severe cases the new leaves become completely lacking in chlorophyll but with little or no necrotic spots. The chlorotic mottling on immature leaves may start first near the bases of the leaflets so that in effect the middle of the leaf appears to have a yellow streak.
Manganese (Mn) - Starts with interveinal chlorotic mottling of immature leaves and, in many plants, it is indistinguishable from that of iron. On fruiting plants, the blossom buds often do not fully develop and turn yellow or abort. As the deficiency becomes more severe, the new growth becomes completely yellow but, in contrast to iron necrotic spots, usually appear in the interveinal tissue.
Zinc (Zn) - In some plants, the interveinal chloratic mottling first appears on the older leaves and in others, it appears on the immature leaves. It eventually affects the growing points of all plants. The interveinal chlorotic mottling may be the same as that for iron and manganese execpt for the development of exceptionally small leaves. When zinc deficiency onset is sudden, such as the zinc left out of the nutrient solution, the chlorosis can appear identical to that of iron and manganese without the little leaf.

What kind of dirt you're using is very
helpful info in giving a good diagnoses!
Cause it looks like a nute deficiency or
ph issue!

Aside from what you think you have got going on, make sure that you berry the stems way lower at your next repot

Kind

Thnks for the tips guys! pH was a bit high, managed to buy a decent meter now. \m/

Managed to get ph from 7.9 to 7. Something else is wrong. Still no change.
The soil was mixed with manure previously. May that affect somehow?

Anyone???
pH, rH, Temp everything normal... what's going on!?
I could only get mine hands on these nutes..some kinda "shake n grow" but I diluted them in warm water today and a fed them a little of that..Are these % ok?

Forgot to say...haven't used nutes until today! That looked liked a N def. But what do I know! The Burning occurs veeeery slowly.
Help.

Your ph was a little high at 7.9 Check out this thread on nutrient lockout, good advice there....https://www.rollitup.org/general-marijuana-growing/8596-nutrient-lockout-explained.html If you've got lockout, then giving them more nutes will add to the problem.

GUYS!!! IT'S GETTING WORSE!
I fed them just a bit yesterday of that stuff to add the N, but look what happened this morning! It looks like the rate of yellowing has increased a lot! And look at those stains..
Notice the new growth doesn't suffer from that until they are at least +/- 1 week old. WTF is going on!?!!
The last pic is a pot filled with plants that I am 95% sure they're male, with the same soil as the my girls. So soil and pH is not an issue. First everyone though it was lack of N, I gave N and this happened. What do I do now?

The damage is on the older leaves, meaning it's a deficiency of one of the mobile elements. Nitrogen, phosphorous, potassium, magnesium, or zinc. Not that you aren't giving them enough, it's that they get locked out by too much of something else. Potassium is locked out by sodium, so if you have a water softener, (which may account for your high ph) stop using your tapwater. K can also be locked out with too much manure.

Ultimately, all of these elements work together, so a disruption in one will have a cascading effect on the rest of your plant. You'll start to see other deficiencies that can be misleading to the original cause. This is exactly why I don't go cowboy with my nutrients, everything I use is engineered to be used with cannabis, and I use it sparingly.

Also, 3 plants in one pot will use more of the available nutrients, leaving the soil with a lower salt concentration than just one plant.

My opinion? Use less manure, mix in 2 tsp dolomite lime per gallon of soil, and try to get some Foxfarm products.

Thanks.
I'll try to get better stuff next time
But you see, I am in Africa..Kinda hard to get the right stuff. And in case you're wondering, no, I can't plant outdoors I live in a flat =)
The pot with "plants" are just for fun..I don't really pay attention to them, just wanted to try out many ways of topping and fimming.
Won't the dolomite lime lower pH a lot?
so what should at this point? would a flush help in anyway???

Sure, flushing would be a good idea. Lime will actually balance the ph. PH is determined by the amount of certain elements in your soil, namely hydrogen for acidic, and calcium and other mineral deposits for alkalinity. If you have more of one type and less of another, your PH will be up or down. Since your plants use cal and mag, your soil will tend to drift towards acidic if it is not replaced. Lime replaces those elements when it's used in the right concentrations.

That's a very rudimentary and noobish explanation, but it's what I got

Thanks m8! I'll Update.

How will I notice the change? Is there chance of regeneration or I wait and see if new growth stays ok?

If your soil is alkaline then the adding of lime will not help. Was the manure fully composted before adding and what percentage of the soil was manure? Someone says Africa and i instantly think is the water quality suitable for growing plants. Peace

Im using bottled water with 6.8 pH. The soil was taken from a garden which I know had manure mixed in, but cant be accurate in %. Im guessing 60% soil, 40% manure.

Flushed. It's much worse. They're curling from the blades to the veins. downwards.
Do I prune to concentrate on new growth or leave the burning leaves to act as toxic disposal?

that soil does not look optimal could be playing a role in lack of nutes