crushed lava

  1. M

    Tar over my Bonsai soil !

    I don't know if anyone else has had tar form on the top of the Bonsai soil. A couple of months ago I re- potted a few of my trees. I make my own soil/mixture. I use Akadama, crushed lava, Pumice, fine gravel , composted bark, and chicken granite. Now a few of my trees have developed watery tar...