Thursday, July 3, 2014
How pecan branches can tell a story
second flush of vegetative growth. If you remember back to last summer, we experienced a dry early summer followed by a wet period beginning in late July. The sudden resupply of soil water encouraged two buds right below the nut cluster to break and grow. In the photo above, yellow arrows point to these second-flush shoots.
froze emerging buds killing all exposed green tissues. In the photo above, the orange arrows point to frozen buds still clinging to the tree. Fortunately, pecan trees are not so easily defeated by a little cold weather. Buds lower on the second-flush shoot were fully dormant at the time of the freeze. These buds survived the cold and grew into this year's new shoots.
In the end, a simple, close inspection of twig growth tells the recent life story of this tree. Weather conditions caused a secondary vegetative flush in 2013 but froze emerging buds in 2014. However, in spite of the weather, this pecan tree produced nuts in 2013 and 2014.