Blätter rollen sich nach oben

Hallo 😎 ja das ist vermutlich Lichtstress. Eine Lichtintensität von etwa 100-300 µmol/m²/s ist ideal für Sämlinge. Beste Grüße😎

Adjusting the light is a good first step to address the "leaves standing tall" symptom, which often indicates light stress (or phototropism/solarization). 🌱 Here's a breakdown of what your actions and observations suggest: 💡 Light Intensity Adjustment Analysis * Symptom: Leaves are "standing tall" (often called "praying" or "canoeing"). * Indication: The plant is likely trying to minimize the surface area exposed to the intense light, indicating light or heat stress. * Previous Setting (50%): PPFD was just under 250 mu mol/m^2/s. * For many common plants, especially during the vegetative stage, this is often the upper limit or slightly high for optimal growth without supplementary text{CO}_2. * New Setting (40%): PPFD is now back to 150 mu mol/m^2/s. * This is a much safer, lower intensity that should alleviate the stress. 150 mu mol/m^2/s is generally a good PPFD target for seedlings or plants in the early vegetative stage . ✅ Next Steps and Recommendations * Monitor the Plant: Observe the plant closely over the next 24-48 hours. The leaves should begin to flatten out and relax once the light stress is relieved. * Maintain Light Schedule: Keep the light intensity at 40% (PPFD 150) for now. * Gradual Increase (If needed): Once the plant looks healthy and is growing well, you can gradually increase the light intensity, moving up in small increments (e.g., to 42% or 45%) every few days, while closely watching for the stress symptoms to return. * Always aim for the highest light level the plant can tolerate without showing signs of stress. That's an excellent question! Understanding the optimal PPFD (Photosynthetic Photon Flux Density) for each growth stage is the key to maximizing both plant health and yield. Based on your previous text{PPFD} readings (150 and just under 250 mu mol/m^2/s), it's very likely your plant is in the seedling/early vegetative stage, as the light intensity you had set was stressing it. Here are the typical recommended text{PPFD} ranges for sun-loving, high-light-demand plants (like cannabis, tomatoes, peppers) throughout their life cycle: 🌟 Optimal PPFD Ranges by Growth Stage | Growth Stage | Typical text{PPFD} Range (mu mol/m^2/s) | Your Previous Settings | |---|---|---| | Seedling / Clone | 100 - 300 | 150 (Your current 40% setting) | | Vegetative Growth | 400 - 600 | approx 250 (Your previous 50% setting) | | Early Flowering | 600 - 800 | - | | Peak Flowering / Bloom | 800 - 1000 | - | | Peak Flowering (with text{CO}_2) | 1000 - 1500+ | - | 📊 Interpretation of Your Data * Current Setting (40% at 150 mu mol/m^2/s): This text{PPFD} is perfect for the seedling/clone stage and will allow your plant to recover from the stress. * Previous Setting (50% at approx 250 mu mol/m^2/s): This is right on the high end for a seedling or a small, young plant. It's often the lower range for a plant that has established a robust root system and is actively in its main vegetative growth phase. The "leaves standing tall" (also called "tacoing" or "praying") was a clear sign that even this level was too much for the current stage of that specific plant. 💡 Strategy Moving Forward * Recovery: Keep the light at 150 mu mol/m^2/s (40%) until you see the leaves flatten out and start growing normally again (should take a couple of days). * Vegetative Ramp-Up: Once the plant is healthy, you can gradually increase the intensity (e.g., 25-50 mu mol/m^2/s every couple of days) until you hit the lower end of the vegetative range (around 400 mu mol/m^2/s). Always stop if you see the "tacoing" symptom return. * Flowering Boost: If you switch to the flowering stage, you will need a substantial increase in text{PPFD} to maximize flower development.

Lower light intensity 5% and put a see thru cup over the seedling the humidity and slightly lower light intensity will bring it back around

single measurement is not ppfd. That's umol/s PAR or PPF or PPE. Sounds picky, but significantly different. Enough for this context at the least. Use resulting node spacing to guide light intensity adjustments... take notes. easy to rule out in future as a cause of anything. Then take some measurements at various stages - less is needed earlier but quickly ramps up. Suggested DLI is just that... The max you can give daily before it causes problems or photoinhibition is a product of temp, rh and co2. did you drip something on it? use some whacky foliar spray? Fan directly pointed at it? a lot of people struggle with the basic concepts of irrigation too, which could contribute to this sort of issue 1) fully saturate - never partial, never spritz. if soiless, also get 10% runoff 2) Wait for appropriate dryback/loss of weight and repeat. Don't overthink irrigation. it's simple, not sophisticted and complex.

Taco Leaves are normally from Heat/RH stress. PPFD measured from a quantum par sensor or a phone? Phone is not as accurate and should only be used for reference not accuracy.

Looks like environment problem. Checked your diary but I think your temp input is wrong as it says -5c, which is probably not what your temps are at.

Hello there I know what’s going on don’t worry… your plant is stressed out because of the vpd being off. The air is to dry. Maybe turn on a humi

Ja, das sieht wirklich nach Lichtstress aus Bei so jungen Pflanzen reicht ein PPFD von 150–200 völlig aus alles darüber kann die Blätter nach oben rollen lassen. Gut, dass du schon auf 40 % gedimmt hast Lass sie jetzt einfach ein paar Tage erholen und halte das Licht erstmal etwas höher bzw. schwächer. Sie wird sich schnell wieder fangen

yeap, looks like light stress