Discover how to grow portulaca with planting instructions, care and maintenance, pests and disease, and more.
Portulaca Garden Guide
Portulaca Stats at a Glance
Botanical Name: Portulaca grandiflora
Common Name(s): Moss Rose
Height: up to 6 inches
Soil Conditions: Well-drained
Sun: Full sun
Soil pH Conditions: 6.1-7.5
Starting Portulaca from Seed
Portulaca does not tolerate transplanting well and can be direct seeded into the garden as soon as threat of frost has passed in the spring.
To start indoors, fill individual peat pots with a fertile commercial soil starter and moisten. Sprinkle the seeds on the surface of the soil, as they need light to germinate. Place in a room with a constant temperature of 70-75°F. Cover with clear plastic wrap to maintain the soil moisture and temperature. Keep the soil moist. When seedlings appear, remove the plastic wrap and move to a sunny location.
When to Start Seeds: 10 weeks prior to last frost
Time to Germination: 5-10 days
When to Plant Portulaca
Transplant seedlings or purchased plants in the garden as soon as the last threat of frost has passed and the soil reaches 70°F. Can be direct sown into the garden.
Where to Plant Portulaca
Portulaca Plant Spacing
Portulaca Care and Maintenance
Plants thrive in heat and will tolerate drought.
Water during dry spells for optimal growth and flowering.
Water sitting on the soil will encourage fungal rot. Water in the morning to allow the water to drain into the soil.
Shear leggy plants down to 2 inches in the late summer for fall blooming.
The most common pests associated with portulaca include ants, aphids, meal bugs, scale, spider mites, slugs, and thrips.