My trees are dormant in mild temperatures? (Answered)

No, I'm afraid this will happen no matter what the temperatures are. Plant dormancy is tied to the seasons, not just the temperatures. I believe the only way to have outdoor harvests year round is to disable winter and probably autumn as well. You can use Tempest to move the holidays around so you don't end up missing any if you want. Not actually move them, I mean insert extra Spooky and Snowflake Days into spring or summer.