After reading up on bonsai care I decided I should probably use another soil mix for my birch. However I should probably also leave it alone for a while to give the poor bastard a chance. But I didn't.
Lately I've been quite harsh on this poor little birch with all the repotting and so and I probably shouldn't do anything at all to it except give it some daily TLC. But I didn't and snipped a shooting twig between my fingernails.