Plant a Red Blossom Leek in Sunsong Ranch. You can purchase seeds from Merchant Greenfield in the Halfhill Market.
Grandpa once told me that the smell of leeks will keep crocolisks off of your property. He must have had a point... he always grew leeks, and I never saw a crocolisk anywhere NEAR his farm.
We're pretty far from the water... but I suppose you can never be too sure.