Should I be worried about my young acer trees?

Williamgiddings25

Ive had my young acer trees since seedlings but last couple of weeks they have become very sad. As you can see by leaves. Also when I poke the soil some black small flys appear. I love these plants. 

Im not an acer expert so any advice please. 

Will. 

Dovefromabove

Why are they indoors? They’re outdoor deciduous plants. They need to experience winter and drop their leaves and have a period of dormancy. 

Williamgiddings25

Just because we’ve been having frost where I am and it’s very cold at moment. Is it a problem them being inside?

wild edges

Your probably doing more harm than good keeping them indoors. They need the seasonal change and winter dormancy. Really cold weather isn't great for acers in small pots though so keep it somewhere sheltered or bubblewrap the pot. They hate getting dry though so make sure some water is getting in. I get late frosts here a lot and have had a few burnt leaves in the spring but never bother protecting the plants. With ones so small though I'd probably want some protection when the new leaves come through but only if frost is likely.

What soil are you using by the way? JI no2 is ideal and the tree will do much better than in multipurpose.

Fairygirl

Absolutely  they should be outside. 
Against a wall is ideal, or among other shrubs somewhere, for the reasons wild edges gives, but be aware that they don't get rainfall so easily against a wall, and if they get dried out, that affects them for spring, so they're better tucked in a border where they'll get the best of both worlds.
Anything in a pot requires a lot more attention than in the ground too.

Nanny Beach

everyone is correct, they are quite small would perhaps benefit from being near by the house, a bit sheltered, but otherwise yes, they are trees, are they in proper acidic compost, probably benefit from bigger pots too, watch out for vine wevils.