Current plant is 6” tall in a bonsai vase. What type of larger pot, soil, and tips for transplanting? Tree grows in more arid environments and stores eater in large bulbous roots.
Typically, you won't transplant the bonsai into a larger pot, unless you want the tree to get larger. If you do choose to, it will only be a few millimeters larger at most. Sizing up too large too fast will result in strange large growth that won't fit the tree.
Repotting will also require trimming larger roots, leaving smaller roots to collect nutrients.
Many times, it will be best just to pull it out of the container, trim the large roots, spread out the smaller roots and repot with a suitable medium of soil and mosses, or even small pebbles to promote drainage.
This collection of articles will guide you on proper bonsai methods: https://www.gardeningknowhow.com/houseplants/bonsai
This is an Indian tree known locally as Parijat. It’s a flowering tree. There was rain recently and this fungus like growth appeared yesterday.
Uh oh. That's Armillaria mycelium. There is no cure for this. As long as it remains dry, the mycelium will have trouble spreading. Any moisture will speed up the damage. The tree will die from this, eventually.