Squirrels love flower bulbs and will dig them up as fast as you plant them. The good news is there are some varieties of flower bulbs that squirrels don't eat because they don't taste good to them. Feeding squirrels is one deterrent. Enclosing bulbs in mesh cages when planting them, and keeping the thin brown bulb skins, known as wrappers, that fall off the bulbs during planting picked up, helps protect bulbs from hungry squirrels.
The strong onion smell and taste deter squirrels from eating allium bulbs under most circumstances. Extremely hungry squirrels may eat these bulbs, but when choosing flower bulbs that squirrels don't eat, allium bulbs are a pretty safe bet. Other plants in this family include garlic, onions and chives, all plants that squirrels detest. Allium flowers come in a variety of sizes and colours. They are hardy in U.S. Department of Agricultural hardiness zones 4 through 9, depending on variety.
Daffodil bulbs do not taste good, which is why squirrels do not eat them; however, as with allium, if they are hungry enough, according to the University of Illinois, they will eat them. Narcissus, which is the botanical name and jonquil are other names for daffodils. While these names all refer to daffodils, the flower shapes, colours and sizes vary considerably. Most daffodils are fragrant, but there are a few that are not. Daffodil bulbs naturalise. A few bulbs, and a few years could lead to a rather large patch of flowers. Depending on variety, daffodils are hardy in USDA hardiness zones 3 through 10. Bulbs plants in warm climates may not survive year to year without an artificial chilling period. Achieve this by digging them up and placing them in the refrigerator crisper for several weeks.
Hyacinth bulbs are toxic, according to Ohio State University, which is why squirrels and other rodents do not eat them. Hyacinth grown in the garden need good drainage. Put a thin layer of small, sharp stones in the bottom of the planting hole to help with drainage, but may help deter rodents. The flowers are highly fragrant. They make excellent long lasting cut flowers as well. They are hardy in USDA hardiness zones 3 through 8.