My first challenge so dont be too harsh hehe. Not expecting to get amazing results for this one but figured I had to start somewhere.
Shot against green card, levels, curves, shadow/highlight, a little clone brush to remove unwanted bits and some usm.
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Like the shadow except for the hair-like bit arching over the right edge of the planter. Looks like you had a hair on your lens or mirror. Try cloning that out (subject to DPC rules, of course)
Cropping this so just the shadow on the wall is the shot would have met the challenge and been a pretty decent photo in all regards. As it is, the orange, brown and black of the bonsai subject detract from the green on green theme and push this towards dnmc.