Because bougainvilleas are tropical natives, their blooming schedule is dictated by temperature and day length.
The primary season starts in late spring and peaks in the heat of summer. You will often see a secondary, spectacular flush in the fall (September and October) as the nights begin to cool. bougainvillea season
During the height of the blooming period, your goal is maintenance rather than growth. During the height of the blooming period, your
arrives like a whispered secret — first a hint of green, then a riot of papery bracts in fuchsia, orange, coral, and white. It’s the time when walls blush, fences disappear under cascading color, and balconies turn into floating gardens. The hotter and drier the days, the more fiercely it blooms. The hotter and drier the days, the more fiercely it blooms
When the wind picks up, the "paper flowers" detach. They do not wilt like roses; they dry on the branch and fly away like scraps of silk. They carpet the ground in drifts of color, crunching softly underfoot, a confetti parade that lasts for months.