The “Mother” tree of Grizzly Clonal Walnut Rootstock™ shown above is a Tulare variety grafted onto a seedling Paradox rootstock.  It thrived when all the rest barely survived in an orchard that faces many challenges.  Our early data indicates this rootstock is indeed a bigger, tougher more productive tree.  The orchard was planted in the 90’s as a replant site after removal of extremely large Serr Trees.  Much of the orchard is very sandy soil, so the replants had to contend with replant disorder, heavy populations of lesion nematodes, generally low nutrition and poor soil structure.  It’s no wonder that the average walnut tree struggles!  It is from this orchard that we found and cloned Grizzly Clonal Walnut Rootstock™