Juniper Turning Yellow on inner foliage

Paradox · Jun 30, 2013

Anyone ever see this before?

I have a couple of Junipers whose inner foliage is turning yellow.
Ive seen them turn brown from being inside or from lack of water and heat scorch.
This is not what this looks like

All of the outer foliage is still green
they have new growth popping out in various places

It hasnt been that hot for that long, they have been watered, not over watered.

They dont have spider mites or other bugs that I can see.
It doesnt look like a fungus.
2 different species involved: J. pro nana and San Jose

Brian Van Fleet · Jun 30, 2013

Every year. They shed some 1-2 year old growth, which is consistent with what you're seeing.

october · Jun 30, 2013

Brian gave you a good answer. They do shed in early Summer. With the foliage that you have on your juniper, it is sometimes tough to spot things like scale though. The scale kind of hide where the needles emerge. Did you look close in between the needles on the stems just to make sure?

Rob

Paradox · Jun 30, 2013

Thanks guys,

I thought that is what it might be since it was more than one tree and 2 different species, but I wanted to be sure. It was kinda freaking me out a bit.

Rob, I did look, but maybe not deep into the needle clusters. I did some work on them today, just some thinning in some areas. I would think I would have seen scale if it were there, but Ill check again tomorrow to be sure.

flor1 · Jul 2, 2013

We're getting the same thing in N Georgia never had it before but been so wet hear think its just to much water and not enough sun.

MidMichBonsai · Jul 2, 2013

I had this as well in a couple of nursery procumbens that I picked up. One was particularly bad but I trimmed all of the yellow out and it has really opened up the tree and helped me see the structure so that I can make better decisions when it goes for it's first styling. I'm hoping this will also encourage some interior buds that will be more mature and not quite so leggy.

Thanks for posting!

Paradox · Jul 22, 2013

Update,

Yep, that's all it was: shedding old foliage. They all have nice new green growth on top and some are pushing new growth on the old wood in different spots.

I didn't see any shedding last year with the two juniper I had so seeing the yellowing this year, with the juniper problems reported elsewhere got me worried.

october · Jul 22, 2013

That is good news. The thing with shedding is although it is a natural function, sometiems it goes on for a while. For trees in the landscape/wild it is fine. However, as far as bonsai. If you have nicely structured pads on a juniper, this "shedding, can really thin them out sometimes. It can make you worry. However, even when the tree drastically thins itself out, it usually replaces those areas in time.

Rob

coh · Jul 22, 2013

I've got this happening on my tall shimpaku (I started a thread about it earlier this year) and the amount of yellowing is somewhat alarming. But...I've been spraying to prevent mites and also using a fungicide, so there's not much else I can do. Hopefully the plant knows what it is doing. If not...I'll have one less tree to figure out how to style (or, one more spot in the yard for something new).

Chris

october · Jul 22, 2013

coh said:
I've got this happening on my tall shimpaku (I started a thread about it earlier this year) and the amount of yellowing is somewhat alarming. But...I've been spraying to prevent mites and also using a fungicide, so there's not much else I can do. Hopefully the plant knows what it is doing. If not...I'll have one less tree to figure out how to style (or, one more spot in the yard for something new).

Chris

Yes, thats what I mean about the worrying. The shedding can go on for so long that the aesthetics start to become compromised. Not a problem for landscape trees, but bonsai, which is largely for aesthetic purposes, yes.

Rob

Juniper Turning Yellow on inner foliage

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