Illustration
White Portulaca
Portulaca grandiflora
White Portulaca blooms from June through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing White Portulaca
Plant it in full sun. It prefers low water. It is hardy in USDA zones 10–11. Expect it to reach about 6 in tall and 12 in wide at maturity, in roughly 1 year (not yet checked).
What this means
Written with AI assistance and not yet checked plant by plant against recorded sources, so treat every fact above as a starting point. Its scientific name was checked against botanical registries, an audit keeps its values consistent with the rest of the library, and a July 2026 review re-read the main facts of every plant then in the library against horticultural authorities without recording a source for each, which is why none of that counts as checked here. The source-by-source check is working through the whole library in the open, and a checked plant says so in this row.
When to plant White Portulaca
Wait until all danger of frost has passed, then plant out White Portulaca into warm soil; in most zones that means late spring. Planted then, it flowers from June to September.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 10, the middle of this plant's hardy range, start with zone 10 in January. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does White Portulaca get?
6 intall5 ft 7 inan adult12 inwideSee White Portulaca in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant White Portulaca
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space White Portulaca about 12 in apart, center to center, so each plant has room to reach its full width.
Add White Portulaca to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Good to know about White Portulaca
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
ASPCA rates moss rose toxic to dogs, cats and horses; it holds soluble calcium oxalates, so a large amount eaten can upset the gut or, rarely, harm the kidneys. per ASPCA
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.