Japanese Maple ‘Bloodgood’

[Balbs]

I’ve had this for a few years.
last week I moved it into my greenhouse for protection when Henri came through. The next morning I let it get an hour of sun in the greenhouse and the leaves all got scorched. Sorry for the bad picture. Any words of wisdom? Just try and let it recover? Is there enough time before winter?

 

[zanduh]

whoa that’s a little beyond scorch, those leaves are toasted right off. Do you know what temperatures you had during Henri in the greenhouse and were you watering during this time? I got a little sunburn on my more fragile deshojo during the 90 degree days here in ct but nothing like that. If we can determine what the cause was we can say if this has a chance to recover.

 

[Balbs]

So it was this past Monday. The tree was in the greenhouse during the storm but I didn’t get out to it until about 10am on Monday, when the sun was out. Unsure of the exact temps in the greenhouse, but I can download that info from my sensors. I had other JMs in there, but none suffered like this. Actually, hardly at all. The plants were well watered even that day since I have an automated watering system in the greenhouse.

 

[WNC Bonsai]

Certainly an interesting way to defoliate a tree! I’d remove the old leaves and hope it pops a new crop before the first frost.

 

[zanduh]

Did you happen to put a new application of fertilizer on the tree before putting it in the greenhouse? Otherwise I agree with Cofga

 

[AcerAddict]

I have two Bloodgoods, one in the ground as a landscape tree and one I'm training for bonsai, so this hurts me to see. Looks like the weather up there is going to stay somewhat warm well into September, so you may see some more leaves if you defoliate. Both my Bloodgoods are still spitting out some new buds and leaves, but we won't start cooling down significantly here until early October.

 

[Balbs]

new application of fertilizer

No, not recently. What’s on the soil in the photos is an old application.

 

[Canada Bonsai]

I let it get an hour of sun in the greenhouse and the leaves all got scorched

I had other JMs in there, but none suffered like this. Actually, hardly at all. The plants were well watered even that day since I have an automated watering system in the greenhouse.

That's not a 'Bloodgood' Japanese Maple. I don't know what it is though.

1 hour of sun alone is not enough to do this to your maple, especially if you had other maples in the same environment that were fine. This tree likely did not receive water (or dried out faster than others for some reason).

I would check very carefully that automatic watering system

Was the tree especially close to an intake or exhaust fan in your greenhouse in contrast with your other maples?

 

[Balbs]

That's not a 'Bloodgood' Japanese Maple.

That’s what the tag at New England Bonsai said. What makes you say it isn’t bloodgood?

Not close to the fans, or at least not closer than the others. It was on the same shelf where it’s shown in the first picture, so higher off the ground and closer to the panels than the others. When I took it back out of the greenhouse, the soil was wet.

 

[Juanmi]

How is the water quality where you live?
Japanese maples don't enjoy hard water, if its roots get some limescale they won't be able to feed the tree

 

[Underdog]

I have 2 in pots and one in the ground. Looks just like my bloodgoods.
That said I'm no expert but, I'd cut it back and expect it to bud back. You are fortunate enough to have the protection from an early frost. There is still time. One of mine is still pushing new leaves.

That said, there is still something missing from this puzzle.

 

[Canada Bonsai]

That’s what the tag at New England Bonsai said. What makes you say it isn’t bloodgood?

The fact that the leaves in the image you posted are not the leaves of a Bloodgood Japanese Maple. There are number of factors I could point to, but for starters the serrated edges on your tree are a dead give away

Bloodgoods are terrible for bonsai, and I'm surprised New England Bonsai sells them for this purpose. Perhaps they are Bloodgood seedlings. If the tree survives, at least you know that it isn't a Bloodgood

Here are a bunch of images from the google search you could have done:

 

[rockm]

Yeah, not Bloodgood. Someone mislabeled it. As shown, bloodgood leaves are that deeply "cut" and serrated.

That damage looks to me to be heat and sun-related... I would keep my fingers crossed, as that catastrophic leaf damage is probably an indication this tree also has root damage from whatever happened to it.

 

[AcerAddict]

Could it be a Tamukeyama or a Suminagashi? Both of those have dark red leaves that are somewhat deeply serrated, but aren't quite a full-blown lace leaf cultivar like Crimson Queen or Viridis.

 

[Firstflush]

If your neighbor is using or near a ball field, park or green belt where herbicides are being used for weed contro, they can easily float on the breeze and kill your plants. Just a thought unless you have figured it to be a water issue already.

 

[hinmo24t]

for henri ialmost moved trees into garage but realised its like a +20* in there all closed up = 110* lately
i bet inside greenhouse was hottt

good luck as well, it was a great looking maple i think. maybe it will survive
because maples burn leafs off easily as defense mech

 

[Forsoothe!]

Bloodgood ain't no good for bonsai...

but it can make nice second-class trees!

 

[Balbs]

serrated edges

Thanks, I’ll take a closer look at the leaves when they hopefully come back in and see if I can do some IDing. I should have some earlier pictures as well.

 

[Balbs]

How is the water quality where you live?
Japanese maples don't enjoy hard water, if its roots get some limescale they won't be able to feed the tree

My well water is pretty hard.

 

[Pitoon]

Good catch @Canada Bonsai definitely not a 'Bloodgood'.

@Balbs yours looks like a typical red leaf JM. Those leaves have very large edge serrations. Unless you did some serious pruning to force the tree to produce immature foliage I really doubt thats a 'Bloodgood'. The leaves look like they dried out from not being watered. Are the branches starting to blacken?

I've attached a 'Bloodgood' that I have as a landscape tree on my property and a rooted cutting. Note the edges of the leaves. They are also beginning their fall transitional colors now.