Why are my seedlings curling/crisping? help please

Grow Cycle Seedling
1

Hi all,

Hoping someone can help me troubleshoot. I’m a first time grower growing in a germination tray with a 7 inch humidity dome and a 48w T5 light directly on top of the humidity dome. I planted my seeds in root riot starter plugs and added clonex solution for nutes. My seedlings have been in the humidity dome for 1 week and 2 days now (planted on March 8th). The temperature in the dome is about 70-75F and the relative humidity is always around 85-90. For some reason some of the seedlings have started to crisp up; the true leaves look completely been burnt/dried up. I’m afraid I may have kept them too long in the humidity dome but the odd thing is some of my other seedlings look perfectly ok. I got scared so I took the humidity dome off lol. Does anyone know what the problem could be? I’ve only watered them twice since planting them since I didnt want to overwater. Here are pictures of them:

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Perhaps the leaves got wet from too much humidity and the light started burning the leaves. Definitely a good idea to open up the dome or remove. Just keep an eye on them losing the humidity. Did you put a lot of clonex? It could be burning them as well. I don’t usually feed for about 2 weeks unless the cotyledons start turning Yellow. I’ve had seedlings get hungry after just 5 days…but maybe it all depends on strain and environment.

1 Like
3

I only put 3ml in a 16oz water bottle. pretty much used the entire bottle on the 72 cell tray. I think you might be right about the light burning the leaves because of too much humidity. Before I took the dome off there were water droplets on pretty much all of the seedlings and their leaves. Do you think my seedlings look healthy? I think they might be too stretchy but I dont know enough… also I lowered the lights to 5 inches from the canopy. Hopefully that helps

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What ph does the water has? You mist them with clonex water? How often?

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I just used one of those 16oz bottled water that you can buy from anywhere. I then added 3ml clonex into the water bottle. I didn’t test for PH or PPM but usually bottled water should be less than 10ppm if I’m not mistaken. I also didn’t mist or spray at all, I just poured directly over all the root riot starter plugs and left the humidity dome on for a week. the second time I watered them (after the first week)I was careful not to water directly on the seedlings and made sure to water the root riots only. So in total I only watered twice since planting them

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They praying , looking for light and thirty, they look dry to my opinion, how hot does it get in there ?

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It’s usually always 70-75F. sometimes at night it drops to 68F but never below that. After removing the dome it’s been about 40-50 RH

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Just not sure that was my input ,I really dont start seeds that way

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Ok i think we can rule out ph and overwatering…
stretching is mostly light related. Maybe tweeking things in this sector might solve the issues.

Any how i would up pot them and burie the stem all the way leaving e
everything from the Cotyledon upwards at light

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Two issues: 1…lack of water and air 2…light is NOT up to the job.

1–I will mist n water twice a day until roots are showing. Humidity dome needs to be removed for a few minutes daily, allowing fresh air.
2—ur babies should not be that tall…weak light makes them stretch like that. as other suggested…bury excess stem in growing media.

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It might just be me, but once the seedling comes up I think it’s time to repot. You would be surprised at how much better they would grow and develop.