Hostas getting sunburned (I think)

I just planted some hostas in the front of my house that is shaded all morning and gets some afternoon sun. Knowing hostas need more shade I still thought these would be ok once my Maple fills out with its leaves. The interesting thing is, they are mainly Patriot hostas which I read can do well in sun? They are starting to get white spots as if something is sucking the life out of them and turning a bit yellow on the edges. Could it be lack of water? Thought it was kind of impossible to kill off a hosta and I'm getting worried. Any ideas? I've had this variety at my old house and never had issues with it in some sun.

If they were grown in shade, and you have just planted them in more sun than they were used to they could sun burn.
You could rig up some partial shade to help them acclimate. Remove the shade a little at a time over a couple of weeks.

Im not entirely convinced the problem is SUNBURN, especially as you mention there are white spots, yellow edges, this sounds more like damage caused by either slugs / snails or some other pest that likes the delicate taste of Hosta's.

Try to go out later on in the evening, even with a torch IF it's too dark, then search for the pests, look carefully UNDER / Back of the leaves, Most pests that like to eat our leaves hide underside of the foliage where predators cant find them (or plant owners LOL)
It might be easier to hand pick and kill by stamping on culprit's if any, if your too squeamish for that, take out a bucket of boiling water and drop the said pests into this, or any other method you like.
There are sprays, pellets and even live killers that will only live on slugs / snails that you mix with water and the little slug eating bugs get washed into the soil, killing the pesty snails / slugs.
Whatever you use re ANY type of treatment for garden pests, cures for diseases etc, make sure you use them on a dry STILL day, you dont want a breeze sending the sprays everywhere BUT the right area you are trying to fix. I much prefer going the NON chemical way however, it's a matter of choice, remember with chemical use, other good insects get killed also. even birds can become affected when the eat the dead slugs etc, they might also feed any chick's, always use the dose recommended on the box, bottle etc, as too strong a dose can do more harm then good, dosage guidance also applies to any feeding you do with plants.

Lastly, while your out searching for the munchers on the Hosta's, scrape away a little soil and stick your finger down into the soil, IF it's dry, you need to give lots of water, if still damp, leave off watering for several days.
As well as a little shade (and yes, they do like a small amount of sun) Hosta's like a damp place too, IF you can make a little more damp, add plenty of humus / leaf mould mulches that wont dry out the soil undenieth, will be great,
These plants are normally tough as old boots BUT for some reason the snails / slugs etc treat them like a night out on the town, also earwigs like to nibble the leaf and these only come out at night to feed, to trap those little insects with the pincher's at their rear end, place shreded newspaper / straw in a small flower pot and place it upside down onto a garden cane, placed above the plants, go search the paper in the pots in the morning and look see IF any earwigs are trapped or hiding out till the following night, either stamp or burn / drown the earwigs (Very fast movers LOL.
Hope this helps a little or send in a picture (close enough to see the damage) that might help more people too.
Best Regards.
WeeNel.