Confused maples

@VenasNursery did you see a lot of leaf curl on oak and redbud this year?

Reason I ask: apparently there are 3 things that can cause fall flowering in plants that set their flower buds on last year's wood:
1) Drought - mentioned here:
extension.umn.edu

Reblooming plants reflect the growing season

Why are spring-blooming plants flowering in September?
extension.umn.edu extension.umn.edu
2) Adequate cooling period followed by heat such that the plant thinks it went through dormancy - here: https://www.purdue.edu/hla/sites/yardandgarden/blooming-out-of-sequence-is-cool/ (also mentions drought).
3) That Purdue article also says "Another factor for some plants is that the flower buds they initiate in late summer do not develop the proper plant growth inhibitor hormones that normally keep the buds dormant. "

So my leaf curl question pertains to #3. We saw a lot of leaf curl this year through much of west and central Ohio - more further north. This is suspected to have been caused by growth regulator herbicide that volatilized and went off site (strong suspicion points to dicamba). I wonder if growth regulator impact could also have changed the development of growth hormones that control blooming????

Drought can explain much of the fall blooming here (I've only seen it on some crabapple, nothing widespread). But now I'm curious.
 
ATH said:
@VenasNursery did you see a lot of leaf curl on oak and redbud this year?

Reason I ask: apparently there are 3 things that can cause fall flowering in plants that set their flower buds on last year's wood:
1) Drought - mentioned here:
extension.umn.edu

Reblooming plants reflect the growing season

Why are spring-blooming plants flowering in September?
extension.umn.edu extension.umn.edu
2) Adequate cooling period followed by heat such that the plant thinks it went through dormancy - here: https://www.purdue.edu/hla/sites/yardandgarden/blooming-out-of-sequence-is-cool/ (also mentions drought).
3) That Purdue article also says "Another factor for some plants is that the flower buds they initiate in late summer do not develop the proper plant growth inhibitor hormones that normally keep the buds dormant. "

So my leaf curl question pertains to #3. We saw a lot of leaf curl this year through much of west and central Ohio - more further north. This is suspected to have been caused by growth regulator herbicide that volatilized and went off site (strong suspicion points to dicamba). I wonder if growth regulator impact could also have changed the development of growth hormones that control blooming????

Drought can explain much of the fall blooming here (I've only seen it on some crabapple, nothing widespread). But now I'm curious.
Click to expand...


Good detective work
 
Round here we have some trees that haven’t fully dropped their leaves yet. Climate change predictions is 6 plus week increase in our growing season.
We have been cold, and dark. Yet not normal.. normal can be fairly wild temperature shifts yet we have had just a moderate paced cooling. Typically we would have our first frost around Halloween. Hasn’t happened yet and only slightly dipping into the high 30’s for our lows. Yesterday was 55 for a high. So not a radical heat wave, just raising the baseline across the board.
 
evo said:
Round here we have some trees that haven’t fully dropped their leaves yet. Climate change predictions is 6 plus week increase in our growing season.
We have been cold, and dark. Yet not normal.. normal can be fairly wild temperature shifts yet we have had just a moderate paced cooling. Typically we would have our first frost around Halloween. Hasn’t happened yet and only slightly dipping into the high 30’s for our lows. Yesterday was 55 for a high. So not a radical heat wave, just raising the baseline across the board.
Click to expand...
We were warm and dry late so things are holding onto leaves...but we also got first snow or the season today which is early... rarely we'll get a Thanksgiving snow.
 
How are the maples looking?

A lot of trees where I live have swollen buds as if it were spring. It's been a warm and dry winter so far but dipping to single digits soon. I'm worried these juicy buds will get scorched....
 
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