The only way I was able to grow crocuses in the open garden when I lived where there were voles was to plant them inside plastic mesh pots sunk in the soil, or up in the rock garden. Also, I had a nice display of Crocus tommasinianus ("tommies" as Mark says) in a patch of lawn. Either voles don't like tommies, or the voles don't like to tunnel among thick grass roots. I have several species of crocuses in the lawn in my new garden, where voles are not present. Today Crocus sieberi, Crocus gargaricus, and Crocus kotschyanus are open in the lawn. Jane McGary Portland, Oregon, USA At 01:04 AM 1/27/2015, you wrote: >Travis, you would have to ask braver and more >crocus wise folk than me. Here any crocus is >smartly devoured by voles. I have given up on >them except tommies which seed and some escape >the gnawing. I will try and get some castor oil/ >ricinus chaff that is good as a rodent repellent >and slightly nitrogenous. It does help a lot! >Â Mark W Brown 1924 route de la mer, 76119 >Sainte Marguerite-sur-mer, France. Â Â Â