camellia buds don’t open
I have had a camellia bush for 8 years, 4 years in Charlotte, NC and I then moved to Myrtle Beach, SC. The result is the same: camellia has buds but they never open (for years).
Bud drop or buds not opening can be due to soil nutrients or even insects.
A soil test can help you determine what may be missing from the planting location.
Neem Oil is a good treatment if you suspect insects. Neem Oil is safe for people, pets and bees.
Here are some links to help you.