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My friend gets hair from the salon to put around her trees so deer won't eat the leaves, she stuffs it in cut up old pantihose in about 4" long tubes. maybe would work for squirrels too. I think bloodmeal works best when put around the bulbs in the ground when first planted.
I have heard that a light sprinkling of bloodmeal on the soil will keep squirrels away. Try it around the blooms and bulbs they seem to go for. Make sure it's bloodmeal and not bonemeal. (sometimes confused at the garden center)
Although I have not tried this myself, I wish I had heard of it before a particularly cheeky squirrel made brunch out of some much-anitcipated blooms in my small townhouse's garden several years ago. The first offense was to the first rose bloom outside my diningroom window. Each morning when I opened the blind, I would note progress on what I knew would be my very first rose of the season. I looked forward to an update each morning. The day the rosebud burst into bloom was the day I opened my blind to find the whole head had been snapped off, leaving a headless stem. The second offense was to a lily that I carefully selected and mailordered from a place in the states called Whiteflower farm. Of course it was more expensive that a lily from the local garden center, but it was a new one and I was treating myself, a rare thing. One day when I was out in the garden to check its progress, I found it all dug up with the remains of the bulb laying as scattered, tear-shaped pips. Oh-I almost forgot. I tried growing sunflowers for my daughter that year as well. The sunflower seeds ended up being dessert!
Good luck.
Maybe you could put out some nuts and seeds for the squirrels, away from your plants. Try putting an animal deterant around your garden, look in the garden centres.