Why acorns dont form

Asked October 20, 2019, 2:46 PM EDT

My oak tree is 15 year old secondary to squirrel planting . The acorns stick to branches and die. No other mature oak trees nearby. Why?

Hennepin County Minnesota oaks horticulture

6 Responses

I can't really see what is going on with your photos, since the images aren't sharp enough. But a possibility that comes to mind is that the acorns were coated with honeydew, a secretion from aphids, and stuck to the tree when they fell. Look at this thread:
https://ask.extension.org/questions/590902

Read here:
https://extension.umn.edu/yard-and-garden-insects/aphids

There is no stickiness or visible aphids although i just saw ants on the immature acorns. The acorns hollow, harden and never fall off.

No wonder the ants were looking into the woody knits. So why do I have no acorns now that i know these are not acorns??

There are a number of reasons why acorn production is low. Some of these are weather and environmental related. Some have to do with the tree's cycle. Read here:
https://web.extension.illinois.edu/askextension/thisQuestion.cfm?ThreadID=20139&catID=195&AskSiteID=87
https://ask.extension.org/questions/376704

It maybe a cycle thing. I will watch the galls more in future. Thank you