Something is eating my hostas from underground. I notice that some of the leaves are chewed through at ground level and when I look closer and dig the plant up, it has been chewed on and there is very little of the plant left. Is this voles?
The pests would be voles, mice or even squirrels or chipmunks. If you see damage to the roots or find burrows, you will need to take steps to get rid of these pests.
My sister in-law gave me some Royal Standard Hosta that she dug up out of her garden two weeks ago. They have been sitting on their patio with not much water. Is their any chance that they will survive? I live in Minneapolis by the way.
If you go ahead and water them thoroughly now they should be ok. Of course, the plant is getting ready to go into dormancy for winter and will require little watering during that time. Hopefully by mid to late spring, the hosta (which is quite hardy) will begin to emerge and regular watering can be resumed. Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/ornamental/foliage/hosta/growing-hosta-plants.htm
Can I transplant hostas from a pot to a permanent place in my garden in October?
As long as you can ensure that it gets plenty of water, it should be fine to transplant now. This article should help with that: https://www.gardeningknowhow.com/ornamental/foliage/hosta/transplanting-hostas.htm
Want to remove them from soil this fall and hold "somewhere" and somehow over the winter then replant in the spring. How do I do that without killing them?
It would probably be better to transplant them to their new location now rather than wait for spring. The plants will go dormant and be fine over winter. This article will help: https://www.gardeningknowhow.com/ornamental/foliage/hosta/transplanting-hostas.htm
However, you can also plant them in containers and keep them over winter, either outdoors near your home or unattached garage. Depending on your region, you may want to wrap the pots or add some mulch and water once a month to prevent them from drying out completely.
When is the best time to transplant hostas?
This article should help with that: https://www.gardeningknowhow.com/ornamental/foliage/hosta/transplanting-hostas.htm
Workers building a new deck for me felt compelled to stomp most of my emerging hosta crowns and also ones that had started to leaf out. A "master gardener" told me that they will come back this year. I don't believe that to be true. Hostas crown but once a season, don't they?
They should be ok and regrow this year. They are amazingly hardy plants. Mine normally have their initial crown eaten off by winter starved deer and they always come back fine and do well for the rest of the summer.
When can I divide hostas?
As long as you can ensure that they get plenty of water, it should be fine to divide and transplant them now. This article should help with that: https://www.gardeningknowhow.com/ornamental/foliage/hosta/transplanting-hostas.htm