🌸 Flowers & Ornamentals for Zone 13
The best flowers to grow in Zone 13 — with variety tips, planting times, and care notes.
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Growing flowers in Zone 13
Flowering plants serve the garden in multiple roles: ornamental colour, pollinator support, and cut flower production. Annual flowers bloom for a single season and are replaced; perennial flowers return year after year once established. Understanding the distinction — and your zone's winter hardiness limits — is essential to building a lasting flower garden.
Zone 13 at a glance
- Last frost
- None
- First frost
- None
- Climate
- Tropical Hot — Hawaii (lowest elevations), Guam, American Samoa
- Soil notes
- Volcanic and coral-derived soils. Young lava flows are extremely infertile; older volcanic soils are deeply rich. Coral-derived soils on Pacific islands are alkaline and require acidification for many crops.
Popular flowers for Zone 13
Sunflowers
Annual; easy from seed; pollinators love them.
Zinnias
Heat-loving annual; prolific when cut regularly.
Marigolds
Annual; repel pests; excellent companion plant.
Coneflowers (Echinacea)
Native perennial; drought-tolerant once established.
Black-eyed Susan
Native perennial; very hardy and long-blooming.
Peonies
Perennial; long-lived; requires cold winters.
Dahlias
Tender perennial; dig tubers in cold zones.
Lavender
Perennial in Zone 5+; fragrant and drought-tolerant.
Cosmos
Annual; fast from seed; attracts beneficial insects.
Rudbeckia (Black-eyed Susan)
Perennial; blooms late summer into fall.
Tips for growing flowers in Zone 13
- 1
Plant pollinator-friendly flowers near vegetable beds to improve yields through better pollination.
- 2
Deadhead spent blooms regularly to extend the flowering season on annuals.
- 3
Cut perennial flowers back by one-third in early summer (the "Chelsea chop") to delay bloom and extend the display.
- 4
Leave some seed heads standing in autumn for overwintering birds and beneficial insects.
- 5
Build soil fertility aggressively — compost, biochar, organic matter
- 6
Grow traditional Pacific staples: breadfruit, taro, coconut, banana