Although their antics are fun to watch, squirrels can be a real nuisance when they dig up your newly planted bulbs. The simplest way to prevent problems is to plant bulbs they don't like to eat. Here are some of the bulbs found to be distasteful to squirrels (the ones in bold are available for purchase now):Allium, Anemone, Arum, Camassia, Daffodil, Fritillaria, Galanthus, Leucojum, Muscari and Scilla.
Plant tulips and crocus, on the other hand, and you're putting out the equivalent of catnip for your cat (or chocolate for me). That doesn't mean you can't enjoy these beauties, it just means you have to outsmart the squirrels. There are two ways to approach this: place a barrier between the bulbs and the squirrels, or use a deterrent — something the squirrels avoid.
Some gardeners go so far as to dig out the entire planting bed, line it with chicken wire, plant the bulbs and then wrap the chicken wire up the sides and over the top of the bed. The squirrels can't dig through the wire mesh but the bulbs can easily grow through the holes.
Squirrels are particularly attracted to newly planted bulbs — when the diggin' is easy! Covering the planting area for the first month or two after planting may be enough to let the soil settle and trick the squirrels. You can cover it with anything squirrels can't dig through but rain can permeate, like chicken wire, hardware cloth or window screens. Planting bulbs later in the fall, after the squirrels have done most of their food cacheing, may prevent some loss of bulbs, too.
There are a number of repellent sprays on the market that may help deter squirrels, with mixed reviews on how effective they are. You may need to reapply them frequently, especially after a rain.
Instead of planting a solid bed of tulips and crocus, you can try interplanting with some of the bulbs mentioned above that are usually avoided by squirrels. That may offer some measure of protection.
You can use the old "if you can't beat them, join them" attitude and set up a special squirrel feeding station. By offering the squirrels a ready supply of easy-to-access food, you might keep them from digging.
Tidy up after planting, too. Don't leave bulb debris (like the papery "tunics" that fall off tulip bulbs) around the planting area, because it acts like a breadcrumb trail to the bulbs.
Hopefully, these techniques will help you foil foraging squirrels this fall, so you can enjoy colorful blooms next spring.