There are a limited number of instances where vegetative matter is used in Jewish ritual.
The only ones I can think of are dipping bitter herbs in salt water at a Passover Seder.
The Lulav and Esrog at Succoth .
Growing up in an apartment we could not have a Succah, but the Rabbi at the little shul where I went to Hebrew School did put one up in his backyard and if memory serves me right, he hung fruits from the eaves or what passed for a roof, on strings and we were allowed to pull them or cut them down to eat on Simchas Torah. Must have been apples, I guess.
But nobody kissed the Rabbi under the apples in the Succah. Oy, what a thought!
SRM