Bulbs?

if they are all more or less in one place, you can place chicken wire or similar over the bulbs. the bulbs will grow thru the holes but the squirrels can't get thru the wire.

Try Netting around the bulbs

I put a plastic berry basket over my bulbs.

I used window screening over mine until they started coming up, but that won't stop them from digging once you take it off. They can be persistent!

I get a couple different peppers in the spice dept. in the dollar store, mix them together and sprinkle it on the soil around the bulbs. Works great in potted plants when they’re looking for places to bury their nuts.