There is a big tree next to the shop. Will lush foliage affect Feng Shui?

It doesn't matter. On the contrary, if you cut it off or something, it will matter! Didn't you see that in The Three Kingdoms, Cao Cao hurt the towering trees with his sword and soon went west? Moreover, when Liu Bei was in the village, there were big trees in front of his house, which were flourishing. At that time, some people said that there must be sages in Liu Bei's family, and it really happened!