A bird? A plane? Golf balls from space?
Hail's a bitch. It's difficult to predict and it can screw up your tenders in a matter of seconds.
Last year it seemed to hail on a weekly basis in April. The gods are angry and they're taking it out on your tulips.
What to do? How to prepare?
Keep heavy plastic, tarps, containers, buckets handy. Cover your most prized possessions before you go to work if hail is in the forecast. Or not.
Now, I'm of the mind where I don't want to be a slave to the garden. I don't think you should have to pop a Xanex just because there a chance of hail. You'd be surprised how much a daffodil can actually take. So your primroses have some bruises. You don't throw the baby out with the bathwater do you?