My cantaloupe, rose moss, aloe vera and Depot potato plants are just about 5" high and have been cut about 2 1/2" above the ground and gone! Don't know what it is. I have covered the holes against rabbits. Could it be birds?
Do Birds Destroy Tender Plants?
Certified GKH Gardening Expert
There can be numerous critters that eat tender seedlings, from mice, rabbits, birds, squirrels or even slugs.
Here are some links with more information.