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Rose moss, key points to know

Rose moss flower
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Low, crawling stems spread into a mat studded with silky flowers in bright, varied colours, the whole thing never more than four to eight inches high. Rose moss (Portulaca grandiflora) is the answer to a hot, dry corner: give it full sun and well-drained soil and it asks for almost no water in return.

Rose moss at a glance
Name Portulaca grandiflora
Family Portulacaceae
Type annual
Height 4 to 8 inches (10 to 15 cm)
Exposure full sun
Soil ordinary, well drained
Flowering early summer to mid-autumn

Blooming all summer long and easygoing, it knows how to decorate your garden as well as your pot arrangements and garden boxes.

Planting rose moss

Preferably in spring for rose moss plants purchased in nursery pots, spacing plants 32 inches (15 cm) apart.

For the sowing, sowing in a sheltered place in February-March or sow directly in the plot in March and April. Thin to 6 inches (15 cm).

Three ways to start rose moss, compared

Rose moss can be bought as young plants or raised from seed, either under cover or straight in the ground. The route you choose mainly changes when you start and how you space the plants.

Three ways to start rose moss, compared
Method When Spacing
Plants bought in nursery pots spring 15 cm (6 in) apart
Sowing in a sheltered place late winter to early spring thin to 15 cm (6 in)
Direct sowing in the plot early to mid-spring thin to 15 cm (6 in)

Whichever method you use, the plants go on to flower from early summer right through to mid-autumn.

Trimming rose moss

Remove wilted flowers.

Learn more about rose moss

This very beautiful annual, that crawls along and spreads out, blooms beautifully with varied and bright colors.

Easy to care for, rose moss only requires very little water and even resists droughts and dry spells.

It will be perfect for your rock gardens, along stone walls, and also in garden boxes, pot arrangements and suspended plants.

Smart tip about rose moss

No need to water, even in hot weather.


Credits for images shared to Nature & Garden (all edits by Gaspard Lorthiois):
Floating in the wind by Lê Vỹ under Pixabay license

Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.

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