Ohhh. Wait I thought that was a planter pot. You have it in a tire on the ground, right?
Whoops I should've looked closer. Don't I look dumb.
How big is your plant?
Flowering happens, prematurely, when plants are root bound. Which may not be your case after all. Lol sorry. Flowering also happens, with changes in temperature, and hours of sunlight. Summer and winter solstices. You can trick a plant into not flowering or flowering (known as forcing) if you can manipulate these.