top-working a young tree by grafting both the central leader and three side limbs. Just to remind you of my grafting efforts, the photo at right shows the tree right after I completed the grafting process. By mid-summer all 4 grafts have grown new shoots but at very different rates. Watching this tree grow has taught me a valuable lesson about the nature of apical dominance in pecan trees.
Obviously, a pecan tree will expend most of its energy to quickly re-establish the central leader. This is why, when top-working, a bark graft is traditionally placed it on the central leader. Although the grafts placed on side limbs were successful, these limbs will continue to grow at a slower pace and will eventually become completely dominated by the scion growing on the central leader.
Many novice growers dream of growing several pecan cultivars by limb grafting several types of scions on the same tree. Yes, multiple grafts can be made but a graft placed on the central leader will always dominate the rest of the tree. This is why it is always best to graft a single cultivar on a tree and make that graft on the tree's central leader.
Friday, July 19, 2019
Tuesday, July 16, 2019
Next spring, I'll re-graft this tree on my new central leader.
Thursday, July 11, 2019
I made my third fungicide application today.
Tuesday, July 9, 2019
2 foot rule" of summer pruning and limit the new growth of side shoot to 24 inches.
The photos above present a before and after look at my young Kanza tree. Summer pruning is a good way to keep pecan tree growing into a strong central leader tree. I have found it an invaluable tool for training young trees.