Grow moss rose in full sun and sharp drainage. The tag may also say Portulaca. Flowers often close at night and on cloudy days.
Give it full sun, sharp drainage, and heat
| Factor | Recommended | Avoid |
|---|---|---|
| Light | All-day sun — six or more hours of direct light | Shade that keeps flowers shut and stems soft |
| Soil | Sandy, rocky, or lean ground that drains fast | Heavy wet clay around the stems |
| Water | Water to settle a new plant, then let the surface dry before watering again | Keeping the bed wet after the mat is established |
| Heat | Hot, dry beds, rock walls, and crevices | Cool, wet starts before the soil has warmed |
| Bloom | Expect flowers to close at night and on cloudy days. Newer hybrids stay open longer in dull weather | Expecting open blooms in rain or heavy shade |
Moss rose is a succulent annual mat. Full sun and fast drainage are the site. Flowers close from sundown to sunup and often stay shut on cloudy or rainy days; that is normal, not a missing fertilizer. [1] Newer hybrids stay open longer through the day, but they still need sun. Wet soil is what rots the stems. [2]
Does moss rose come back every year?
It is a frost-tender annual. Plants die with frost. Seed often drops and volunteers return the next warm season, usually less showy than the parent mix.
Where is the best place to plant moss rose?
The hottest, driest bed you have that still drains. A rock wall, a gravel strip, or the front of a hot border. Skip shade.
Do moss roses spread easily?
Each plant makes a low mat about 10 to 12 inches across. It also self-sows. Deadhead if you want fewer volunteers.
Set a nursery pack after frost
Wait until frost risk has passed and the soil is warm. Slide the root ball out intact — moss rose resents torn roots. Set the crown at the same depth as the pack, and space plants about 6 to 12 inches apart so the mats can knit without staying wet. [3] Water to settle, then let the surface dry between waterings.
- Confirm moss rose (Portulaca), not a garden rose and not an ice plant.
- Pick full sun and ground that drains, even if it is sandy or rocky.
- Wait until after frost when the soil is warm.
- Water the pack, then slide the root ball out without tearing it.
- Set the crown at the same depth as the nursery mix. Space plants about 6 to 12 inches.
- Water to settle. After new growth, let the surface dry before watering again.
Deadhead or shear if the mat gets straggly
Pick off spent flowers if you want more bloom and fewer seedlings. If the mat looks thin by midsummer, shear it back so new growth and flowers follow. [4]
- Deadhead spent flowers if you want to limit seed.
- If bloom slows or the mat looks straggly, shear it back. New growth should follow.
- Do not keep the bed wet to “push” bloom. Sun and drain do that job.
How do I keep my moss rose blooming?
Give it full sun. Deadhead spent flowers, or shear a tired mat in midseason. Wet shade shuts it down.
Should moss roses be cut back?
Yes, if the mat looks straggly. A midseason shear tidies it and can restart bloom. Do not treat it like a shrub rose prune.
Are you supposed to deadhead moss rose?
Yes, if you want more flowers and fewer volunteers. Leave the seed if you want next year’s seedlings.
Use a draining pot or hanging basket
A hanging basket or a wide pot in full sun works if the mix drains and you empty standing water from the saucer. Water when the top of the mix is dry. Do not sit the pot in a tray of water.
Do moss roses do well in pots?
Yes, in a draining mix in full sun. They spill over the rim of a hanging basket. A soggy saucer rots the stems.
Pair it with other heat lovers
Partners should want the same hot, draining ground: zinnia, nasturtium, and other sun annuals. Keep a vigorous trailer from smothering the low mat.
Not a garden rose, ice plant, or dwarf jade
Moss rose is Portulaca. A “moss rose” on a rose-nursery tag is a garden rose with mossy sepals — a shrub with a different prune and a different winter. Ice plant is Delosperma, a hardy succulent carpet. Dwarf jade / elephant bush is Portulacaria. Read the Latin on the tag.
Is moss rose a real rose?
No. The summer annual is Portulaca. A moss rose in a rose catalog is a garden rose with mossy buds.
Are moss rose and Portulaca the same plant?
Yes for this page. Moss rose, rose moss, and Portulaca on a bedding tag are the same succulent annual.
Are portulaca and ice plant the same thing?
No. Ice plant is Delosperma. Both like sun and drain, but they are different plants with different winter hardiness.
Showy moss rose or common purslane
Culture is the same hot sun and sharp drain. Habit is the choice. Do not treat a shop list of extra series names as a different plant.
Showy moss rose (P. grandiflora) is the needle-leaf carpet with rose-like singles, semis, and doubles in hot colors. Common purslane (P. oleracea) has flatter, spoon-shaped leaves and a weedier sprawl; it is the edible relative, not the flower show.
Is moss rose invasive?
It self-sows. Volunteers are common and often less showy than the mix you bought. Deadhead if you want fewer seedlings. It is not a turf takeover.
Set it in full sun and sharp drainage, water lean after it takes, deadhead or shear if the mat tires, and read the tag so you did not buy a garden rose.
FAQ
Are extra shop names extra plants?
No. Names such as Happy Hour, Sundial, or Fairy Tale use the same sun and drain. This page covers the two catalog plants.
Can I eat moss rose?
Common purslane is the leafy edible. Showy moss rose is grown for flowers. Do not treat a bedding mix as a salad crop.
What is Portulaca?
Portulaca is the Latin genus for moss rose and purslane.
Is this a garden moss rose?
Not if the tag says Portulaca. A moss rose in a rose catalog is a garden rose, not this annual.
Can I grow moss rose from cuttings?
Broken stems can root if the mix stays barely moist. Seed or a nursery pack is the usual home start.
Related guides
Recommended plants
References
- [1] NC State Extension -
https://plants.ces.ncsu.edu/plants/portulaca-grandiflora/ - [2] University of Wisconsin Extension -
https://hort.extension.wisc.edu/articles/moss-rose-portulaca-grandiflora/ - [3] Wayne County Cooperative Extension -
https://wayne.ces.ncsu.edu/news/plant-spotlight-moss-rose/ - [4] University of Arkansas Extension -
https://www.uaex.uada.edu/yard-garden/resource-library/plant-week/moss-rose.aspx
This note is part of Portulaca Guides.
More first-season notes by plant are gathered in How to Grow Guides.
Updated: Reviewed by Bosquelle Editors