(Carya illinoinensis) The northern pecan and the southern pecan are very different from each other in hardiness, nut size, and length of season required to ripen. The nuts grown in Texas, southern New Mexico and Georgia are the southern variety. The biggest limiting factor in growing the tree for nut production is heat units. Northern pecans, like their southern cousins, need the heat units to fill the nuts completely. Our generic seedlings are grown from stock in northern Kansas in a colder area than ours. Our named varieties are from isolated self pollinating stands in Nebraska and grow true to type on their own roots. The nut size may not be as large as the southern types, but they have the fine flavor for which pecan is known and can develop a crop in central and northern New Mexico unlike the southern varieties. With named varieties it is best to have at least one of each pollen type (designated as Type I or Type II) for best kernel fill and pollination. These are seedlings 12”- 24” and will take 5-7 years for the first crops.