How to Grow Portulaca Sundial
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Portulaca Sundial
Portulaca grandiflora 'Sundial'
flowerPortulaca Sundial is a vibrant annual flower series known for producing large, colorful blooms that open in sunny conditions, resembling a sundial. These low-growing, succulent plants form dense mats of fleshy foliage and are prized for their heat and drought tolerance. They're ideal for containers, edging, rock gardens, and dry landscape plantings.
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Example Portulaca Sundial timeline · Pittsburgh, PA (Zone 6b)
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Plant Portulaca Sundial
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Portulaca Sundial blooms
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Portulaca Sundial dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-11 as an annual; performs best in warm climates (zones 9-11 as perennial)
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Seedling
2-3 weeksTiny seedlings with thin, succulent leaves emerge within 7-10 days. Plants are delicate and require consistent moisture.
Keep soil lightly moist (not wet). Provide bright light. Thin seedlings to prevent crowding.
Vegetative
3-4 weeksPlants develop branching stems and dense foliage. Fleshy, needle-like leaves become more prominent. Growth is compact and low-growing.
Reduce watering frequency. Provide full sun. Begin hardening off before transplanting outdoors.
Pre-flowering
2-3 weeksPlant forms a bushy mound as stems proliferate. First flower buds appear at stem tips.
Continue minimal watering. Ensure 8+ hours of direct sun daily. Begin feeding with dilute balanced fertilizer if in containers.
Flowering
6-10 weeks (until frost or end of season)Large, papery blooms open in morning sunlight and close by evening or in cloudy weather. Flowers come in vibrant colors: red, orange, yellow, pink, white, and bi-colors.
Water only when soil is dry. Deadheading extends bloom time but is not essential. Maintain full sun exposure for continuous flowering.
Seed Production
4-6 weeksFlowers fade and small seed capsules develop. Plants may become leggy if not deadheaded.
Allow some flowers to remain for seed collection if desired. Cut back leggy growth to encourage branching and re-flowering.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Ensure excellent drainage; avoid overwatering; improve air circulation; remove affected stems immediately
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Spray with water to dislodge; use insecticidal soap or neem oil if severe
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Increase humidity; spray leaves with water; apply neem oil or miticide if severe
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Use yellow sticky traps; spray with insecticidal soap or neem oil
Uses
Edible Portulaca Leaves
CulinaryWhile ornamental portulaca is primarily grown for flowers, the succulent leaves are edible and nutritious in salads and cooked dishes. They have a slightly lemony, crunchy texture and are rich in omega-3 fatty acids. [source]
Container and Landscape Accent
HouseholdPortulaca Sundial is ideal for hanging baskets, window boxes, rock gardens, and xeriscaping projects. Its low growth habit and colorful blooms add visual interest to patios, balconies, and dry landscape areas with minimal maintenance. [source]
Traditional Medicinal Use
MedicinalPortulaca species have been used in traditional medicine for anti-inflammatory and antioxidant purposes. The succulent contains alpha-linolenic acid and other beneficial compounds, though ornamental varieties should not be consumed medicinally without proper identification. [source]
Pollinator Support
WildlifePortulaca flowers attract bees, butterflies, and other pollinating insects, providing a food source during hot summer months when other nectar sources may be scarce. [source]
Cut Flower Arrangement
CraftThe colorful, cheerful blooms can be used in fresh cut flower arrangements for short-term enjoyment. Stems should be cut in early morning and placed immediately in water. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Portulaca is primarily grown for ornamental flowers and does not require harvesting. Deadhead spent flowers to encourage continuous blooming. To collect seeds, allow flowers to fade and mature; collect brown seed capsules and dry completely before storing.
Fun Facts
- 🌱 The 'Sundial' name refers to the flower's behavior of opening in morning sunlight and closing by evening—a trait called nyctinasty. The blooms reliably track the sun's position throughout the day.
- 🌱 Portulaca seeds are extremely tiny (smaller than pepper flakes) and number in the thousands per capsule, making this plant a prolific self-seeder in warm climates.
- 🌱 Portulaca is a succulent that stores water in its leaves, allowing it to thrive in extreme heat and drought where most annuals would wilt. It can survive with virtually no supplemental water once established.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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