I've done a few tests and realized that cherry blossoms aren't growing when there is a flower (picture for reference) one block above the blossom and within 1-2 blocks. Not sure the limit on height since some block collision happens with it too. They still grow when there is 2 blocks stacked next to it or with another tree but only issue is with flower. That I tested
Linked issues
Attachments
Comments 1

Thank you for your report!
We're actually already tracking this issue in MC-228758, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote or any additional information to the main ticket it would be appreciated.
Please be sure to use the search feature before creating a ticket to see if the issue has already been reported.
Quick Links:
📓 Bug Tracker Guidelines – 🛠 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 💬 Mojira Discord