Moles don't eat Hosta, voles do. Moles eat grubs and earthworms. Did you dig one up to see what was there? If it was voles you would see the roots and crown eaten away. Another thing you might see is little tunnels in the mulch or holes alongside a cement patio or walkway. Did you mulch heavily? Voles like that. It allows them to move about easily without being seen. If I think I have voles I usually check by putting a piece of apple under a broken pot and covering it up well. Put it out at sundown and check it in the morning. Voles will have consumed it or eaten it partially.

If you are sure voles are the problem you can do several things. 1. You can trap them. This has limited effect since they breed faster than rabbits. Voles are a major food source for Hawks, Fox, Owls and other predators so they depend on an amazing rate of procreation to survive. 2. You can poison them. This can be effective, but it's dangerous, especially if you have pets. Some people dump poison down a hole and put a rock over it, but the directions on the poison specifically prohibit that as a safe use of their product. The other thing is that predators who eat poisoned voles consume that poison also. There are research reports that show evidence of poison in the systems of Red Tail Hawks. 3. You can go to Dollar Tree and buy a $1 wire wastebasket and plant your Hosta inside that. Leave the rim of the basket one inch above the soil line. This will prevent voles from eating the crown of your plants and they will live to grow for another year. 4. You can try the new systemic tablets from Repellex. I haven't tried these yet, but my sister likes them. You plant a tablet or two in the root system of the Hosta and it makes the whole plant roots, leaves, and flower scape taste like hot sauce. Repels rabbits and deer also. $20 for 50 tablets. Link below.

Here's a picture of a Hosta inside a wire wastebasket. The Hosta in the center has a homemade wire barrier made from hardware cloth. The one on the right has a wire wastebasket from Dollar Tree.

Sorry about your memorial garden. Make sure you know that you are dealing with voles before spending the time and energy to get rid of them. Let us know how you make out.

Steve

Here is a link that might be useful: Repellex systemic repellent

...or chase them into your neighbors yard with:

The Recipe For Organic Vole & Mouse Control
Large Area Applications Using A Hose-End Sprayer

1 - 2 Oz Castor Oil
1 - 2 Oz Dish Detergent

Add the mixture to the jar of the hose end sprayer. Then fill the jar with water. Attach to your hose and thoroughly water every location that you want to deter the pests from. If your hose-end sprayer has a dial, set it to the highest setting.

Here is a link that might be useful: Castor oil hosta control

In my zone 5 garden Blue Angel, Earth Angel, etc. are not showing yet, also no pips under the mulch. Perhaps all your grandson's angels are still there?
Bernd

Jonnyb, I found the video information useful in that I realize we sprayed for voles at the wrong time of year. He suggests to spray in the fall after the first frost, but before the ground freezes. I'll definitely do it again this fall. Thanks for posting!
Karen