I got my start of garlic many years ago in the grocery stores where I shop. The garlics we liked I saved cloves from and planted at the proper time. It took a couple years for it to acclimate to our climate but is now very prolific if one of the seed heads falls to the ground or I don't get all of a bulb removed from the ground. This years entire crop is from volunteers from last year. I plant them around the roses and never have had problems with insects or black spot on my few roses.
There are many fewer snakes in our yarden since we got Moses Peacock about 9 years ago. He has not been a problem in the garden but we did have one who was. That one didn't stay here long.
Our banty chickens are afraid of the hornworms if they are very large. I too just break off the stem it is attached to. Then I just stomp on it.
GOD bless and keep each of you.
EvaMae