Portulacaceae
Moss Rose (Portulaca grandiflora): The Ultimate Care Guide
Portulaca grandiflora
Extremely low-maintenance: requires full sun, infrequent watering, and well-draining sandy soil. Perfect for borders, ground covers, containers, and rock gardens. Thrives in heat and drought.
Every 7 days
Direct sun
15° - 35°C
20% - 50%
Categories
What is Moss Rose?
Moss Rose (Portulaca grandiflora) is a easy-care plant from the Portulacaceae family. Portulaca grandiflora, commonly known as Moss Rose or Rose Moss, is a popular annual succulent native to South America (Argentina, Brazil, and Uruguay). It produces brilliant, rose-like flowers in shades of red, pink, orange, yellow, white, and purple that open only under direct sunlight. This droug...
Moss Rose grows up to 20cm, with spread of 30cm, watering every 7 days, 15°C – 35°C, 20–50% humidity. It is not suitable for indoor environments and safe for pets.
Unlike many tropical plants, Moss Rose tolerates watering mistakes. Best for beginners. Unlike many popular species, Moss Rose is safe to keep around pets.
How to Care for Moss Rose?
TLDR: Moss Rose needs Direct sun, watering every 7 days, and temperatures between 15-35°C with 20-50% humidity.
How Often Should You Water Moss Rose?
Water only when the soil is completely dry, approximately every 7-10 days. Moss Rose is highly drought-tolerant — overwatering is the primary cause of root rot and plant death.
How Much Light Does Moss Rose Need?
Requires full sun for at least 6 hours daily. Flowers open only in direct sunlight and close at night or on cloudy days. More sun means more blooms.
What Is the Best Soil for Moss Rose?
Use sandy, well-draining soil or a cactus/succulent mix. Avoid rich, moisture-retaining soils. Poor, dry soils actually promote better flowering.
What Pot Should You Use for Moss Rose?
Terracotta or clay pots with drainage holes are ideal. Shallow, wide containers work well as ground cover displays. Avoid pots without drainage.
Care Schedule
Fertilize
Every 30 days
What Is Moss Rose and Where Does It Come From?
Portulaca grandiflora, commonly known as Moss Rose or Rose Moss, is a popular annual succulent native to South America (Argentina, Brazil, and Uruguay). It produces brilliant, rose-like flowers in shades of red, pink, orange, yellow, white, and purple that open only under direct sunlight. This drought-tolerant, low-maintenance plant thrives in hot, sunny conditions and poor soils.
How to Propagate Moss Rose?
Seed Sowing
Seeds are very fine — mix with sand for even distribution. Germination is best at 21-27°C (70-80°F). Self-seeds readily after first season.
- 1 Scatter seeds on the surface of moist sandy soil — do not cover, as they need light to germinate
- 2 Press lightly to ensure good soil contact
- 3 Place in a warm, sunny location
- 4 Mist gently until germination occurs
Materials needed:
Stem Cutting
No rooting hormone needed. Keep barely moist until rooted — do not overwater.
- 1 Take a healthy stem cutting 5-8 cm long with 2 nodes
- 2 Remove lower leaves
- 3 Let the cut end dry for 1-2 days to callous
- 4 Insert into lightly moist sandy substrate
Materials needed:
How Big Does Moss Rose Grow?
TLDR: Moss Rose can reach up to 20cm tall with Fast growth rate.
Max height
20cm
Spread
30cm
Growth rate
Fast
Foliage
Deciduous
Plant Uses
Ornamental
Great for decoration
Ground Cover
Soil coverage
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Moss Rose?
TLDR: Moss Rose is susceptible to 5 known diseases. Monitor regularly for early detection.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Crown Rot
Crown rot is a serious fungal disease that attacks the crown (base) of the plant where the stem meets the soil. It is caused by various fungal pathogens including Phytophthora, Fusarium, and Rhizoctonia. The disease thrives in waterlogged conditions and can quickly spread to kill the entire plant if not addressed promptly.
Powdery Mildew
Powdery mildew is a common fungal disease caused by various fungi species including Erysiphe, Podosphaera, Oïdium, and Leveillula. It affects over 10,000 plant species worldwide. The disease thrives in warm, dry climates with high humidity and appears as a distinctive white powdery coating on plant surfaces.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Fun Facts
Moss Rose flowers open only in sunlight — on cloudy days, the blooms stay tightly closed
It is native to South America and naturally adapted to survive intense heat and drought
A single plant can self-seed and return to the same spot year after year
Despite its delicate appearance, it can thrive in scorching heat above 35°C with minimal watering
Frequently asked questions
How often should I water Moss Rose?
Why are my Portulaca flowers not opening?
Is Moss Rose toxic to pets?
Can Moss Rose grow in poor soil?
Does Moss Rose come back every year?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Peace Lily | Easy | Low light | 4d | ⚠️ |
| Swiss Cheese Plant | Easy | Partial shade | 10d | ⚠️ |
| Golden Pothos | Easy | Low light | 8d | ⚠️ |
| ZZ Plant | Easy | Low light | 18d | ⚠️ |
