How to Grow Pacifica Periwinkle
Wikimedia Commons
Pacifica Periwinkle
Catharanthus roseus 'Pacifica'
flowerPacifica is a compact, heat-loving annual cultivar of Madagascar periwinkle (vinca) renowned for its prolific flowering and disease resistance. It produces cheerful five-petaled flowers in pink, white, red, or bicolor combinations and maintains a tidy mounded habit ideal for containers and garden beds. This cultivar is particularly valued for its ability to thrive in hot, humid conditions and resistance to fungal diseases.
Looking for a specific variety?
When should you plant Pacifica Periwinkle in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Pacifica Periwinkle timeline · Pittsburgh, PA (Zone 6b)
-
Plant Pacifica Periwinkle
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Pacifica Periwinkle blooms
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Pacifica Periwinkle dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-11 as an annual; perennial in zones 10-11. Best performance in zones 5-9.
Sign up free to see if Pacifica Periwinkle grows in your zone — and get a personalized planting timeline.
Get my Pacifica Periwinkle timeline →Growth Stages
Seedling
7-14 days to emerge; 2-3 weeks to first true leavesTiny seedlings emerge with 2 rounded cotyledons. First true leaves are small and elongated.
Keep soil consistently moist but not waterlogged. Provide bright indirect light indoors. Maintain 70-75°F for best germination. Avoid damping off by ensuring good air circulation.
Transplant Ready
2-3 weeks after emergenceSeedlings develop 2-3 sets of true leaves and are 2-3 inches tall. Roots begin filling seedling cells.
Harden off seedlings by gradually exposing to outdoor conditions over 7-10 days before transplanting. Feed weekly with diluted balanced fertilizer. Pinch tips if seedlings become leggy to encourage branching.
Vegetative Growth
3-4 weeks after transplanting outdoorsPlant develops bushy, compact form with multiple branching stems. Foliage is glossy green and dense. No flowers present yet.
Water moderately. Begin fertilizing every 2 weeks with balanced or slightly phosphorus-rich fertilizer. Space plants properly to ensure good air circulation. Plant outdoors after last frost date when soil warms to 60°F+.
Flowering
4-5 months until frost, continuous with good careFlowers begin to appear at branch tips. Plant produces continuous blooms throughout the season. Flowers are 5-petaled with contrasting center eye. Multiple colors available depending on variety.
Continue regular watering; increase slightly during bloom to support continuous flowering. Deadhead spent flowers to encourage more blooms, though Pacifica is self-cleaning. Fertilize every 2 weeks with phosphorus-rich formula to promote flowering. Watch for pests and disease.
Decline/Frost Kill
Late fall until first frostFlowering slows and plant deteriorates as temperatures drop below 50°F. First frost kills annual plants. Foliage may blacken.
Enjoy flowers as long as possible. No overwintering needed unless in zones 10-11 where perennial growth may continue. Collect seeds from mature flower pods if desired (though seeds may not come true).
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray foliage with water to dislodge. Use insecticidal soap or neem oil. Improve air circulation. Avoid overhead watering.
-
Use yellow sticky traps. Spray with insecticidal soap or neem oil weekly as needed. Remove heavily infested leaves.
-
Spray with water to dislodge. Use insecticidal soap, horticultural oil, or neem oil. Encourage natural predators like ladybugs.
-
Remove by hand or prune heavily affected stems. Spray with horticultural oil or neem oil. Monitor regularly for early detection.
-
and
(fungal)
Ensure good air circulation. Water at soil level only, not foliage. Remove affected leaves promptly. Avoid overhead watering and evening watering. Apply fungicide if severe.
Uses
Not for consumption
CulinaryCatharanthus roseus contains toxic alkaloids and is not edible. All parts of the plant should be considered poisonous if ingested. [source]
Pharmaceutical source
MedicinalCatharanthus roseus is a historical source of vincristine and vinblastine, powerful alkaloid compounds used in cancer chemotherapy. However, extraction should only be done by pharmaceutical professionals; garden plants should not be used medicinally. [source]
Container and bedding ornamental
HouseholdPacifica periwinkle is primarily grown as a colorful ornamental plant for borders, containers, hanging baskets, and mixed plantings. Its compact habit and prolific blooming make it ideal for brightening patios, balconies, and garden beds throughout the summer. [source]
Pollinator support
WildlifeThe abundant flowers provide nectar and pollen for bees, butterflies, and other beneficial insects, making Pacifica a useful plant for supporting pollinator populations in gardens. [source]
Cut flower and display
CraftIndividual Pacifica flowers or short sprays with foliage can be used in small floral arrangements, corsages, or pressed flower crafts due to their delicate appearance and bright colors. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Pinch or deadhead spent flowers regularly to encourage continuous blooming (though Pacifica is largely self-cleaning). Pinch tips of young transplants 1-2 weeks after planting to promote bushier growth. To collect seeds, allow a few flowers to mature into seed pods; they will dry on the plant and crack open, releasing small brown seeds.
Fun Facts
- 🌱 Pacifica is named after the Pacific Coast and was bred for improved heat tolerance and disease resistance compared to older periwinkle cultivars. The series revolutionized periwinkle breeding by producing compact, self-cleaning plants ideal for modern landscapes.
- 🌱 Catharanthus roseus is native to Madagascar but is now naturalized in tropical and subtropical regions worldwide. It has been traditionally used in folk medicine for centuries, though modern use is limited to pharmaceutical extraction in controlled settings.
- 🌱 The Pacifica series comes in multiple distinct colors and patterns, including solid pink, white, red, and salmon varieties, as well as bicolor forms with contrasting eye centers. All share the same excellent heat and disease tolerance.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Pacifica Periwinkle planting timeline
Tell us your zip code and we'll calculate exactly when to start Pacifica Periwinkle seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Pacifica Periwinkle timeline →