Hello Saundra!

Thank you for contacting Ask Extension about your Hosta and Gladiolas.  

Slugs and Snails are a good possibility for the holes in your hosta plant leaves.  This also happens to Gladiolas.  Without pictures, I can only advise you from your description.  Here are some remedies.

Slugs and Snails

Slugs and snails are major pests of hostas that can cause large, irregular, unsightly holes on the foliage. Slime trails are also a dead giveaway that these mollusks are eating your hostas. Since slugs and snails need a moist environment to survive, they usually hide during the day and feed at night.

Control:

• Use baited traps in the early spring and after rainfalls during the rest of the growing season.
• Thin the leaves of crowded hosta plants to increase air movement. This helps the dew and raindrops on the remaining leaves dry out faster and makes them less attractive to slugs and snails.
• Scatter a light layer of sand (especially coarse sand) around your plants because slugs and snails don’t like to cross dry, coarse textures.
• Mow regularly and remove debris near your hosta plants to remove hiding places and help keep these pests off your hostas.
• Plant slug-resistant hostas. Check with your local nursery about such varieties.

https://www.canr.msu.edu/resources/hosta-pests-and-diseases

Hostas need to be watered during dry periods and fed with light applications of fertilizer every six to eight weeks. The one problem gardeners have with hostas is that slugs like to munch on them. You can help this situation by not watering them in the late afternoon.

https://www.facebook.com/photo/?fbid=<personal data hidden>126952&set=gm.<personal data hidden>11447

Here's a resource with several natural remedies for this problem.

https://drecampbell.com/natural-homemade-insecticides/

I hope this helps you to keep your garden healthy.  I have also heard that crushed dried eggshells scattered around each plant prevents the slugs and snails from getting on them. 

I hope this helps.  Please let me know if you need to know more information.