Moles don't eat bulbs or
plants, they eat grubs and worms. They can dig up the bulbs and
plants, however, while tunneling looking for food. Voles on the other hand will eat bulbs. They don't create the upper tunnels that moles do...they dig under the ground and eat whatever vegetation they can find. You might want to try to get rid of the mole before you
plant there. I find that the best way to do is to just wait until you see the earth moving and shove a spade or shovel into that spot and kill it. All those so called mole killers you see at Lowe's , etc. (like mole killer pellets)don't work because moles won't eat them since they aren't a grub or a worm.