Common sunflower (Helianthus annuus)

Clare of London, you made me think of other options… Humane Squirrel Deterrant: Gather as many oyster shells as you can find on a riverside after a proper storm, scatter half of them around your garden or plants; with a heavy rock (or tool of choice - mallet come to mind) - smash the other half until they become shards. Place oyster shards around plants and especially in areas where earth has been freshly tilled and fertilized. Squirrels will look at this, curse, and move on: They know. Since I own a Kaffir lime tree I double the protection with the inhumane use of natural barbed wire (enormous thorns on the tree limbs). Got squirrels? Get oysters.