Again. When you started those seeds what is the dli usually. 30000lux 18hrs with my crees comes out to about 30 mol. Thats much more than a seedling uses. Thats the recommended minimum for fruiting tomatoes in greenhouses. And wheat corn beans those are field crops. There is lots of selective breeding or genetic engineering that goes into those products also. In nature there are no tilled fields. Most seedlings start under at least a thin cover of weeds or bushes or trees and they start much earlier when the sun is not that strong.
Yeah uv and too much light does that. I don’t know where you’re from but in full mediterranean sun, my seedlings would get fucked. Thats just how it is.
Now anycase, why do you think he is having problems with all his 25 seedlings? Why do you think all his plants are wilting as if they are trying to stay away from the light? That plant is not rootbound. 80F with a 60-70 humidity. Which seems fine (ok could be a little cooler but its fine). So whats the problem there?
Actually it doesn't matter. We would disk the field and then drill the wheat. Their was no brush or weeds to Shadow it from the sun.
When we no till instead of working the ground up we use row cleaners that mount of the front of the planter and it cleans the row of debris because you want bare dirt exposed for your seed bed. Why? You want full direct sunlight. It warms the soil and you have direct sun on the seedlings so they grow off quick.
We start corn planting here between April and late June. June 22nd is the highest peak of the sun. We plant beans from may to middle of July all in peak sun. Wheat is planted from late September to early November. That's not because of the sun but because you can't let the wheat get too big or the winter cold will damage it. That's called winter wheat. Up north from here they plant their wheat in the full sun of May and June as it is too cold for winter wheat.
I have a small plot that I plant in just regular corn that's not hybrid or GMO. I raise that and feed it to the chickens and I save that seed for next year's garden. Been done for decades and decades. That corn has been around for a very long time. It's also planted in bare dirt straight sun.
Im in the south. I've lived on a farm my whole life so did my dad and his dad and my grandad's dad and so forth.
As far as his plants go he should be able to stick his finger in the soil and tell if it is overwattered or not. If he was growing under dim light and then flipped on some powerful cobs and put them 12" away then they will wilt.
I'm not their so I don't know what he has done or the condition of his soil.
But to say seedlings can't withstand full sun from the get go is silly. I could go outside right now and plant a bean in full sun and it will do exactly the same thing those other 5000 cannibus seeds I have planted in full sun have done. ... Grow like a champ.