Good afternoon everyone,

I am new to Bonsai and have recently been getting very into it. I purchased several trees which I've since moved to bonsai pots and started trimming after their spring growth.

Four of my trees are growing indoors. Some of these are tropical, but I've read they all do well indoors (two ficus ginseng, a chinese elm, schefflera).

I live in Canada so temperatures are high at the moment but can be dropping below 10C at night, plus they get into a negatives in winter. This is why these trees are not outdoors, though I could keep them out during the summer if that's advised.

Two of my trees have developed white bark on the lower portions of the trunk. They are watered with tap water and I'm hoping this is the cause and nothing to worry about. I would appreciate any advice you're able to give. Are my trees in danger?

I will post a photo shortly.

Thank you.

Adding a photo, hopefully you can see this well enough.

i dont see the white bark your talking about. but do you guys have hard water? i could be calcium build up.

any tree will thrive much better outdoors.