Whats wrong with them ?

Hey Wizthc! It’s totally normal for plants to look a bit droopy right after a heavy watering, especially if you let the soil get really dry beforehand—it’s like they’re having a "food coma" while the roots adjust to the sudden moisture. Since your pH (6.4), temp (23-24°C), and PPFD look pretty much spot on, you don't need to stress too much. The droopiness should disappear within a few hours as the plants pick up the water and the oxygen levels in the soil stabilize. Just make sure you aren't watering too frequently now; keep that wet-dry cycle going so the roots can breathe. If they stay droopy for more than a day, you might be giving them a bit too much at once, but based on the photos, they look healthy and vibrant. Keep doing what you're doing, they look like they’re off to a great start. Happy Growing, Growmie!🌱🏻

u need to increase P ppm at least by half then u'll be gold

Actually, looking closer at the lighter green shading between the veins on your lower/middle leaves, you might be seeing the start of a Magnesium deficiency. Two possibilities here: 1. The Light: 550 PPFD is quite a lot for them right now. If the light is too intense, the plant's metabolism runs faster than the roots can provide Mg, causing that fading. 2. The "Droop" connection: Since they are droopy from watering, the roots might be struggling to breathe. If the soil stays too wet, Magnesium is one of the first things they stop absorbing. My tip: Don't dump a ton of CalMag in yet. Let them dry out first so the roots can function again. If the new growth stays pale or the yellowing between the veins gets worse, then add a light dose of CalMag to your next feeding.

too wet / cold root zone

In my opinion everything you described actually sounds pretty solid. The slight drooping after watering can happen, especially if you let them dry out a bit before. Some plants react a bit more sensitive than others, so it’s normal that not all of them look the same. Personally, I tend to run a slightly lower pH in this stage, but that really depends on the nutrients you’re using. When I run BioTabs (organic), I don’t really measure pH at all. With mineral nutrients like Canna, I usually go closer to around 5.5–5.8. You can also support them with foliar feeding, spraying under the leaves where the stomata are. I’ve had good results with Boom Boom Spray from BioTabs. If you’re using mineral nutrients, you might also want to try something like Cannazym to support root health, especially after dry-back phases. Overall though, your setup and parameters look good. I wouldn’t overreact, just keep things consistent. If you have more questions, feel free to reach out. Have fun and good luck with the grow. Happy Growing 🙏

Hi Wizthc, Parameter looking good don´t think you did something wrong.... Do you have clones from a mother plant, F1-generation seeds, or just feminized seeds? "F1 hybrids (first filial generation) typically show high uniformity in many traits, but not automatically in all. High uniformity: F1 plants are usually very similar in appearance, growth rate, and habit because the parent lines contribute more consistent, balanced traits." Otherwise it's not surprising that they grow differently, depending on which gene branches were inherited as dominant.

They look pretty healthy. One shows some minor lockout on new growth, but that could be genetics. Your RH is a little low, which can cause transpiration issues, and the soil looks a touch dry but not sure what you're running. Honestly, minor tweaks, these look pretty healthy.

you need more than 1 dripper at the base of those plants. Looks like large volumes of the medium aren't getting wet. ~500 ppfd is fine for 18hours of operation. if running lights longer that could be too much.

...but in general: Your plants look very healty, no reason for worries.

This is interesting. Seems like the plants in corners and edges (where there is less wind, so higher humidity) have fresher leafs. Seems like the humidity is just a little too low.