The weather the past several days has been great for grafting pecan trees. There is nothing better that spending time outdoors carving scions and placing grafts. In a previous post, I've documented how I make a 3-flap graft but this year I took some photographs that I hope will shed additional insights into using this grafting technique.
I use the 3-flap grafting technique exclusively on small pecan trees. The tree pictured above (on left) had a single stem and was about four feet in height. To encourage the tree to accept my graft, I cut the stock tree down to about 1/3 of its original height (above, right). Whenever I'm grafting, I always remove a significant portion of the stock tree's top growth to encourage the tree to accept the scion.
Wednesday, April 26, 2017
Wednesday, April 19, 2017
The first tree I came to was a little over six feet in height with a top divided into three main branches (photo at right). For some, this tree would provide the prefect opportunity to place a 3-flap on each of the branches in an effort to increase the likelihood of obtaining at least one good graft. However, grafting close to the top of a tree actually increases the probability the tree will reject the grafts and simply grow around the scions.
bark graft to attach the scion to stock (photo at right). As my usual custom, I then attached a bamboo stake to the tree to protect the scion from bird damage and provide a place to tie up the scion's new shoots to prevent wind damage.
Because I removed so much of the top of the stock tree, this scion will grow with a lot of vigor. I'll trim the scion down to a single shoot about 4-6 weeks after grafting. The combination of vigorous growth and a single shoot will make training this new tree to a central leader shape very easy.
Tuesday, April 11, 2017
|From L to R: Hark, Major, Giles, Faith (11 Apr 2017)|
In contrast, the photo below shows 5 protogynous cultivars with a range in bud stage. The buds on the Goosepond twig are just barely getting started while the Lakota twig has leaves unfurling. Once again the flowering habit of these cultivars is clearly displayed. At this point, catkins of protogynous cultivars are still hidden inside their buds and won't start to emerge for several weeks.
|From L to R:Goosepond, Colby, Kanza, Surecrop, Lakota (11 Apr 2017)|
|Protandrous Faith vs protogynous Lakota|
Monday, April 10, 2017
The twig of the left comes from a tree growing in an Osage silty clay. In contrast, the twig on the right is from a Kanza tree growing in a Cherokee silt loam. Both soils originated as river deposited sediments. The Osage soil is a true river bottom "gumbo" soil while the Cherokee soil is a lighter textured second bottom soil.
The greater the clay content of a soil, the slower that soil warms in the spring. Cold soil inhibits the growth of new roots and with slower root activity bud break is delayed.