I have a Larch pseudolarix bonsai. Recently had some pest issues, mainly due to overwatering on my behalf. This has been rectified. I'm new to Bonsai etc.

This little Larch is sat in completely the wrong soil. It's all peat by the looks, bought from a garden center. I also have a tiny carmona that is dire need of repotting too - as water doesn't penetrate the top of this soil.
So I am looking to repot really soon, I know the general rule is Spring time. But I am wondering if I can do it now, rather than have my trees sat in a bad mix for another 6/7 months.

It's mid summer here in the UK, and it's fairly mild now. But am wondering what affect this will have heading into autumn after a repot.

Again, I have been reading many many online sources and the more I read, the more I get conflicting information.

My plants are mainly indoor, they get tonnes of light all day. But they also get lots of air and wind, as they are situated by large french doors.

Any help or advice is appreciated.

Here is a picture of my trees location. Bit of nice evening sun coming in now. And a close up of the larch soil.

The golden larch should be outside if you want it to live. I would not re pot at this time of year but you could drop on to a bigger pot without disturbing the roots The other one is not hardy and grows all year so it can be done anytime.

Thank you. I have moved the tree outside now. Hoping this helps it a little bit.

I seem to be getting attacked by every pest imaginable at the moment. Larch has mealy bugs and some fungal gnats. Carmona has an aphid green fly infestation and my Chinese elm seems to also have fungal gnats and spider mites.

Nightmare all in one.

Have changed watering habits to reduce over watering. Switched from solid to liquid fertiliser for the time being. Have also treated the plants with rose clear ultra to kill off the aphids and have a bottle of SB plant invigorator to be more proactive with pest control. I now also have a cider vinegar mixed fly trap by my trees to try and catch those pesky gnats.

I'm hoping that these changes should see improvement in the trees health. But what a learning curve straight off the bat eh.

Nothing like learning whilst being chucked in the deep end.

I sincerely wish they all get well soon!

Just an update for you all on the larch. It has been outside for a week or two now. And seemingly happy out there. But I have just noticed black spots on the trunk. Or should I say patches of black.

I've watered it once since it's been outside and we have had some rain.
I also cleaned and removed all the moss growing from the top of the soil and it has returned very quickly.

I fear that the soil is just too retentive and this is harming the tree. Have attached pics of what I'm talking about.

How much of a risk is it to repot now? Because I fear this may be root rot and it will likely die anyway.

Thanks again folks.

larch will most likely die if repotted when in leaf.

Yeah that's what i thought. I have found out through some advice that Hydrogen Peroxide in the soil may help with root rot. Do you think this is a good avenue to go down?

I think way to many people think they have all sorts of horrible diseases in their plants, when in fact nothing is wrong with them.

I would never pour peroxide on my plants. Instead I would focus on prper care for the plant given the substrate it is growing in.