Just noticed that my two grafted annona salzmannii trees are handling the cold weather differently
One is grafted onto annona glabra , the other is on annona montana
The tree grafted onto glabra is suffering from the cold, all the leaves are drooping, after it was exposed to only 39F
But thr tree grafted onto Montana is unfazed by the temp drop...and they were sitting side by side in the greenhouse.
I'm wondering if this is becasue annona salzmannii is an evergreen species, and the deciduous glabra rootstock is trying to shut down? Thus interfering with sap flow and tree vigor, during a cold snap?
I was thinking the Montana, which is evergreen, is a better choice as a rootstock, especially if you're exposed to cold weather...maybe it keeps the tree from getting confused? And shutting down?