I Want my Bonsai to get BIGGER!Unless you work to prevent that, as long as you can keep it alive, your bonsai will inevitably get bigger. But left in a bonsai pot and trimmed so that it doesn't look like my "lock-down" hair, it will take a long, long time.
Dry winter air is a killer and sadly there really aren't many options to change it. But at least if you understand the cause, you can watch out for the effects.
How will you care for your bonsai over the winter? Generally, winter is a time to rest and just about every tree needs a period of slowed growth. Trees from a temperate climate have their rest period triggered by shorter daylight hours and lowered temperatures. Native trees can handle the cold but that is not the case for all bonsai trees, particularly tropical and subtropical trees