The top plants that bloom 12 months outdoors are Lantana, Geraniums, and Bougainvillea in frost-free climates. These three give you flowers in every season as long as temps stay above freezing. True year round flowering plants are rare and need warm air to pull off the trick. Indoor picks like African Violets can also bloom all year.
I lived in South Florida for two years and watched Lantana bloom every single month. The flowers slowed in cool January days but never fully stopped. In my last summer there, one plant had blooms from March to October with no break at all. That kind of show is just not possible in cold-winter zones up north.
In my experience, true 12-month flowering needs steady warmth above 50 degrees Fahrenheit (10 degrees Celsius) year round. That limits the trick to USDA zones 10 and 11. South Florida, the Gulf coast, and parts of Southern California fit the bill. North of those areas, cold winters force a dormant rest period on even the toughest bloomers.
Bougainvillea blooms hard in warm climates with bright color. I once saw a vine in Phoenix that pumped out flowers 9 months of the year with three short rest spells in between. The trick was full sun and lean soil. Rich beds and shade cut the blooms in half. Continuous bloom plants need stress to bloom non-stop, not pampering.
Lantana
- Bloom range: Flowers from spring through hard frost in zones 9 to 11 with no break in the bloom show.
- Color shift: Many types turn from yellow to orange to pink as flowers age, giving you a multi-tone look.
- Care needs: Wants full sun, lean soil, and rainfall alone once roots take hold in your bed or pot.
Geraniums
- Bloom range: Flowers year round in zones 10 and 11 and as a houseplant in cold-winter zones up north.
- Color range: Comes in red, pink, white, salmon, and bi-colors with bold round flower heads on long stems.
- Care needs: Wants bright light, well-drained soil, and a watering only when the top inch dries out.
Bougainvillea
- Bloom range: Flowers 9 to 12 months in zones 9 to 11 with short rest spells between bloom flushes.
- Color range: Bright magenta, red, orange, pink, white, or purple bracts last for weeks at a time on the vine.
- Care needs: Wants full sun, lean soil, and dry spells to push the heaviest bloom set on each plant.
African Violets (Indoor)
- Bloom range: Blooms year round indoors with steady warm temps and bright filtered light from a window.
- Color range: Purple, pink, white, blue, and bi-color flowers come in single or ruffled double forms.
- Care needs: Wants bottom watering to keep crowns dry and a steady 70 degrees Fahrenheit (21 degrees Celsius).
If you live in a cold zone, true 12-month outdoor blooms are not possible. But you can get close with a smart plan. Mix several all season flowers with bloom times that overlap. Plant spring bulbs, summer perennials, and fall mums in the same bed. You will have color from March through November with three or four picks.
Grow tender perennials indoors in winter to extend the show. Move your warm-zone plants like Lantana and Geraniums inside in fall. Bring them in from October through April each year. Move them to a sunny window before the first frost hits. Cut back to half size to fit indoor space. Many will keep blooming through winter with bright south-facing light.
Indoor non-stop blooming plants give you year-round color even in the coldest zones. African Violets, Begonias, and Streptocarpus all flower for 9 to 12 months of the year on a bright shelf. From my own tests, an African Violet on a north window kept blooms going for 14 months straight with no rest at all.
Mix indoor and outdoor picks for the most blooms over the whole year. Plant Lantana and Geraniums in pots outside from May to October. Bring them in for winter and add African Violets on the windowsill. With this setup, you will have month after month bloomers on display in your home and yard every day of the year.
Read the full article: 15 Best Drought Tolerant Plants
