I've been cold stratefying in the fridge and planting germinated chestnuts in pots outside on the patio. I did NOT mark them particularly because truthfully, I didn't think they would grow. I know I've planted some from the Korean Hmart market and some from Whole Foods market. They might have been Korean (the really big ones) and regular (Italian?) chestnuts.
I was thinking that the seedling with small clusters of pale colored leaves in the right photo at the base of pecan seed/sapling was almost certainly chestnut, but I discovered these big-leafed seedlings growing out of another pot in the back of the patio (Left photo)
Are they chestnut seedlings, too?