Apex domains cannot have CNAME records.
Question and response
Question
dig hoehnenlandscaping.com. NS
Answer
hoehnenlandscaping.com. 5 NS ns-764.awsdns-31.net.
hoehnenlandscaping.com. 5 NS ns-575.awsdns-07.net.
hoehnenlandscaping.com. 5 NS ns-1832.awsdns-37.co.uk.
hoehnenlandscaping.com. 5 NS ns-1691.awsdns-19.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0