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Four o'clock

Mirabilis

Also called Four o'Clocks, Umbrellawort, Umbrellaworts

Four o'clock
Photo: Wildfeuer, CC BY 2.5

Mirabilis is a genus of about several dozen herbaceous plants, mostly from the Americas, best known as the common four o'clock (M. jalapa) grown for its fragrant, deep-throated flowers that open late in the day. Many species form tuberous roots that let them survive dry or cool seasons.

Family
Nyctaginaceae (Nyctagin family)
Grows as
Bulb
Light
Full sun, Part shade
Water
Water regularly during growth and let the top of the soil dry slightly between waterings; tubers rot in soggy soil.
Soil
Well-drained garden soil or a loam-based potting mix.
Temperature
18–30 °C; protect below 5 °C, as frost kills top growth (tubers may survive).
How easy
Easy
Safety
Mildly toxic: Roots, leaves, stems and seeds contain raphides (needle-shaped calcium oxalate crystals) that can irritate the mouth and skin; seeds and roots of some species are also reported as purgative.

About

Mirabilis is a genus of plants in the family Nyctaginaceae known as the four-o'clocks or umbrellaworts. The best known species may be Mirabilis jalapa, the plant most commonly called four o'clock.

There are several dozen species in the genus, of herbaceous plants, mostly found in the Americas. Some form tuberous roots that enable them to perennate through dry and cool seasons. They have small, often fragrant, deep-throated flowers.

Uses

Although best known as ornamental plants, at least one species, mauka (M. expansa), is grown for food.

Other Mirabilis plants

Winged four o'clock · Scarlet four o'clock · Mauka · Marvel of Peru · Desert wishbone-bush · Sweet four o'clock · Colorado four o'clock · Heartleaf four o'clock

Text excerpted from the Wikipedia article Mirabilis (plant) by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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