Apex domains cannot have CNAME records.
Question and response
Question
dig gardenersmuse.com. NS
Answer
gardenersmuse.com. 5 NS ns-806.awsdns-36.net.
gardenersmuse.com. 5 NS ns-1350.awsdns-40.org.
gardenersmuse.com. 5 NS ns-1531.awsdns-63.org.
gardenersmuse.com. 5 NS ns-357.awsdns-44.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0