- You Will Get 5 Seeds Of Hardy Pecan Tree Carya Illinoinensis King Nut Native Fruit Tree Seeds. - Description: - Name: Hardy Pecan. - Other Common Names: King Nut / Illinois Nut Tree / Carya Pecan / Hicoria Pecan / Big Shell Bark. - Scientific Name: Carya Illinoinensis Syn. Carya Olivi Formus. - Color: Yellowish Green Flowers / Brown Nuts. - Plant Seeds: Outdoors After Danger Of Frost / Indoors Weeks Before Last Frost / Cold Stratify. - Bloom Time: April – May. - Harvest: Oct – Nov. - Hardiness Zone: 5 – 9. - Plant Height: 75 - 100' +. - Plant Spacing: 6 - 10' For Production / 40 - 60' For Long Term. - Light Requirements: Sun. - Soil & Water Preferences: Average.