The pilot reported that during the landing roll on his first landing to his newly constructed airfield; the airplane's left main wheel came in contact with "something" and bounced in the air. The airplane veered to the left, the left wing tip struck a branch, continued to veer to the left and impacted a tree, which resulted in substantial damage to the left wing spar.

The pilot reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.