minetest.register_abm({
                nodenames = { options.grow_plant },
                interval = options.interval,
                chance = options.grow_chance,
                catch_up = false,
                action = function(pos, node, active_object_count, active_object_count_wider)
                        local p_top = {x=pos.x, y=pos.y+1, z=pos.z}
                        local p_bot = {x=pos.x, y=pos.y-1, z=pos.z}
                        local n_top = minetest.get_node(p_top)
                        local n_bot = minetest.get_node(p_bot)

                        if nbot and string.find(n_bot.name,"flower_pot") then
                        minetest.log("action","moretrees: "..dump(options.grow_plant).." cannot grow because it's placed on a flower pot!")
                        return
                        end