Kwanzan Cherry Help

[Hump]

Nuts,

I bought this last fall, and didn't repot this spring because I wanted to leave it be for a year. Before now there was never any roots coming out of the bottom, but after just looking I have TONS popping out. Will it be okay until spring, or should I repot it now even though it's risky? I haven't done much with this tree, as it kind of been a back burner one. I bought it labeled as a kojo no Mai, but found after it leafed that it's not. Which is okay, I still like the science behind trying to bonsai everything.

Side note: The blossom of increased roots must be due to this powder supplement I've been using in my watering. Its supposedly a professional strength microbial superpack that's supposed to encourage mycorrhizal fungi . Since it also has the goods such as Kemp, molasses, fulvic, humic, and Amino acids I figured why not try it. I bought it thinking okay, couldn't hurt but probably not all the hype it says, but wow this stuff has all of my trees growing endless roots.

 

[Hump]

Bump

 

[Forsoothe!]

So, slip pot it to a larger size to bridge to next spring.

 

[Pitoon]

You could slip pot as @Forsoothe! suggested into something larger or just trim those roots off. I would not do any major root reduction until it goes dormant.