Answer: I haven't a clue as to what "Tigerize Shoemack" might be. However, I wonder if whoever wrote the sign meant "Sumac". If so, sumac (Rhus) grows in full sun and depending upon cultivar can grow from 2-8' tall. Since you've seen the plant, you might be able to go online and look at pictures of sumac. Perhaps you'll find the plant. I hope so!
Q&A Library Searching Tips