Yes the soil is amazing. I have seng growing in other areas that were planted in the fall of 2007 that have roots and tops that are not half as big as these.
When I planted these about 5 years ago I bought seed from multiple sources. I drew a map and a few other spots of the seed I planted but have since lost it. Back then I kind of thought it might be important to know where the seng seed came from. However, if I knew then what i know now, I would have made sure I took better care of the darn map.
There were seed suppliers that I bought seed from in WI, MO, MD and OH. I cannot remember for the life of me which ones I put seed down from at the good spot. I just know I put seed from one at the top of the hill and one from another at the bottom of the hill.
Both suppliers seed did pretty good.