This rootstock is resistant to many soil-borne diseases and parasites. Graft heirloom varieties to this root stock to improve their performance to these issues and cold as well.
 
 
 
Make sure the stem of your new plant closely matches the shape and diameter of Supernatural root stock. 
 
 
 
To graft, mist regularly. When both plants (Supernatural and Heirloom)  have 2 true leaves and stems are 1.5-2.0 mm in diameter, slice both seedlings with a razor 1/2" below the cotyledons at a 45-60 degree angle. Place a tube clip (whose diameter is slightly less than the stems diameter) half way down on the cut end of the lower piece of rootstock (the piece with the roots). Insert the top part of the scion into the tube so the cut surface aligns perfectly with that of the rootstock.