How to Grow Portulaca (Moss Rose): Succulent Groundcover for Sun and Neglect

How to Grow Portulaca (Moss Rose)

Portulaca (Portulaca grandiflora), also called Sun Rose or Sun Plant, is a Brazilian native that forms a 3–6 inch mat of succulent leaves and brilliant, rose-like flowers in rose, yellow, white, orange, red, purple, and pink. Butterflies love it. Superb as groundcover along walks, on slopes, in rock gardens, and around foundations. Spreads easily; seeds need light to germinate—do not cover.

Edible note: Seeds edible raw or cooked; ground into soups and sauces.

Propagation

Sow seeds directly (press in, don’t cover) or indoors 6 weeks early (heat mat helps). Germinates 10–15 days. Transplant after frost, 10 inches apart. Established plants root from cuttings. Prolific self-sower—plant where you want it to return.

How to Grow Portulaca

• Light: Full sun.
• Soil: Loose, sandy/loamy, sharply drained.
• Water: Drought-tolerant; water only in extreme drought. Containers: let dry between waterings.
• Fertilizer: High-nitrogen at planting; high-phosphorus before bloom. No more needed.
• Maintenance: Deadhead for more blooms. Prune for neatness. Ensure air flow to prevent rot. Frost-tender—cover if cold threatens.

Bloom Time

Summer.

Pests & Diseases

Aphids, gnats, snails/slugs. Stem/root rot in wet soil—avoid with sharp drainage and raised beds. Fungicide in humidity if needed.