Deficiency or excess

I’ve had the same when used AN nutes. They’re too heavy on nitrogen.

The tips are starting to show signs from over feeding and the yellowishness is probably a slight magnesium deficiency caused by the high percentage of coco coir in your mix. Feed slighly less, or less often and add some cal-mg to your line up and things should improve, although there is really nothing that wrong right now. No one grows 100% perfect plants ever! As for the holes, sometimes they just happen for no reason..........no plant will ever grow 100% perfect leaves, 100% of the time!

sigh. 3 causes of your issue. (yellowing leaf tips) #1, Light is too close, is it? #2, your plants lack nutrition, FEED them! #3, poor watering practices. If your light distance is ok, and you're not watering the shit out of them keeping the soil saturated all the time, then the only other thing that will cause yellow leaf tips is lack of nutrients, namely Nitrogen, as i said initially. Your entire plant is in need of more nutrition than what it's getting.

They look a touch anemic. The yellow tip could be the lack of nitrogen, and the overall paleness of your leaves. Take a look at the bottom leaves and note if you see any discoloration or fading green or yellowing starting at the leaf tip and working it's way towards the leaf stem. Nitrogen deficiency typically starts at the bottom of the plant. Your growth tops are usually a lighter shade than older growth simply because it's newly developed plant matter. But fading green on the upper portion of the plants can be a lack of Sulfer. Nutrient deficiencies and toxicities manifest in so many different ways. It all depends on severity of the situation. When I initially had a look at your plants my first thought was early nutrient burn, because i saw some of your leaf tips are turned downward. But not all of them are. I also don't see any yellowing on the lower half of your plants which makes me question it being Nitrogen. But some of your leaves look like it's in the very early stages of nitrogen deficiency and just a general lack of food. I didn't take a look at your journal so i have no idea what you are feeding, what strength and how often. I also don't know the other spec's of your space, like VPD, light distance, temperature, humidity. But just looking up and glancing at the thumb nails i immediately see a anemic plant that needs food. They are a pale light green and they should have a more lush mid green colour to them. If they were dark green then they are over fertilized. My guess is your plants are under fed. But to know for sure you can leave it a few more days and see how it develops. Then post again with a new question and pix of the progression. And try to include pix of the bottom of the plant, mid plant, and top of the plant. Not just close ups of the affected area because determining an issue takes a view of all of the plant sometimes.

Manganese deficiency. Google the chart and look at Manganese. Not magnesium.... Manganese. The first stage of deficiency has burnt tips, yellowing in the middle and dark green edges. I believe this may be your problem. I would test runoff ppms and ph no matter what. Getting a EC or PPM count will tell you if you have a toxicity, or a deficiency. Also ph, see if it's out of wack in the runoff. If so, these can lead to the plant not being able to uptake nutrients thus looking like a deficiency. The answer will always start in the runoff. Getting those numbers let's you know where to start. But guessing based off the leaves, I would say early stages of Manganese deficiency possibly caused by the lack of it, or due to ph not being correct. Goodluck. Please consider selecting me as the answer so I can be entered for a chance to win grower of the month contest I would really appreciate your support growmie 🙏 😃