I suppose if you're simply looking for emergency cover and you want to cover the garden with something that will dissipate the impact of the hail stones, then simply getting a plastic painter's drop cloth (cheap at Home Depot, cheaper yet at Big Lots or Harbor Freight) and anchoring it down over the garden with a few things like tomato cages to stand up under it to keep the plastic off of everything, and you might be able to dodge more trouble.

My yard is soggy and the lawn is now overgrown. It's too wet to mow. I'll have to time this right, to mow but when it isn't bright sunlight. I'm off the drugs now, but I'm supposed to stay out of the sun for a while yet. Hard to do in Texas in July!

SRS