
Photos below are by season, and dated, to show you strongest bloom times; which is summer, in the SF Bay Area, but expect blooms sometimes 3/4 of the year, if you’re one of the lucky ones! In northern California, expect semi-dormancy in the winter. If you have a mild microclimate/location foliage may remain all winter. You might even have some blooms in January and February.
NOTE: This is part 1 of Bougainvillea series. (Part 2 Here)
‘Bougainvillea Calendar’
photos through the seasons
WINTER ~
Bougainvillea in February

Bougainvillea – famous Crooked Lombard Street, San Francisco. Winter (Light Blue home with Bougainvillea growing against front of home)

Bougainvillea in winter. Crooked Lombard Street. SF

Winter Bougainvillea. Less foliage at bottom. Crooked Lombard St., San Francisco

Bougainvillea in February, winter, San Francisco, CA

Bougainvillea in winter San Francisco
SPRING ~
Bougainvillea in April

Bougainvillea spring San Francisco

Red Bougainvillea close up spring. SF, CA

Bougainvillea in spring, Belvedere, CA
SUMMER ~
Bougainvillea in June

Bougainvillea Summer, SF

Bougainvillea example with two different colors growing together. Beautiful. Presidio Heights, San Francisco. Summer.
Bougainvillea in July

Bougainvillea and blue Jacaranda tree flowers

Red espalier bougainvillea in a pot. Berkeley, CA. July
Bougainvillea in August

Bougainvillea August

Bougainvillea August

Bougainvillea August

Purple Bougainvillea swallowing San Francisco house. Summer. Presidio Heights.

Red Bougainvillea- and white Plumbago. August. Berkeley, CA
FALL ~
Bougainvillea in October

Red Bougainvillea, Fall, Sea Drift, Stinson Beach, CA
Bougainvillea in November

Red bougainvillea in fall. Pacific Heights, San Francisco

Purple Bougainvillea in fall with both fresh and dead flowers/bracts. Pacific Heights, San Francisco

Purple Bougainvillea with lots of spent (dead flowers) in fall. Pacific Heights, San Francisco
Conclusion
Love Bougainvillea and want to learn more about this exceptional plant? See what the difference is between Bougainvillea vine and Bougainvillea shrub form ( Part 2).