Hey, I've been recently growing a few weed plants. Presently the seedlings are outdoors 24/7, in direct sunlight (getting sufficient water). Recently however, they're showing up brown spots and bit of the leaves are coming off. (see photo)
http://i44.tinypic.com/25ic02c.jpg
Any advice on what this may be? I was thinking perhaps too much light, damaging the leaves? Maybe some sort of parasite of sorts? I don't water them during the day, as that can damage them when water gets onto leaves and magnify sunlight, so that isn't it.

Thanks

Maybe your putting to much fertalizer on them? If I remember correctly seedling do not need much if any fertilizer on them. And as I look closer maybe you dont have enough dirt in the little containers? Just a thought.

No fertilizer should be used this young period.
Your seedling is dying, and if revived, surely to be stunted.

I suggest you kill it.

Or if you're a desperate motherfucker, flush, transplant into starter cup and give er' a break. Let her(chances are low at this point with stuntage for female, but hope) build up an immune system in the shade, no direct sunlight anymore. No watering after first flush.

Follow that to the exact, and then go from there.

Next time you mess with her at above point will be when starter cup is rootbound and you're burying her stem into the ground/half gal/gal/pot of choice and beginning to feed nutrients.