A question...

has anyone grown any decent buds just by simply growing in soil with no additives, and just water for feeding?

With a big enough container and good soil, sure. If we think of decent as the same thing.

like dank buds

The quality will be good, the quantity will suffer more compared to a well-fed plant.

not yet this year i am going to take 50 seeds out in the woods and plant themgo back one more time to pull males when they start to flower. and the last time willbe to cut them down. this is going to be an experament, thats all.i want to see what is to become of them with just plain oldmother nature. i well not have to water as to where i willplant them. very good water tableto just plant and forget welli will during myelk bow hunting season willlook at the from afar. just to see if the are growing. my dank will be in the green house getting all the goodie goods.