MIRABILIS jalapa (Four O'Clock, Yellow) is a perennial flowering plant native to the Americas. While it is most commonly known for its bicolor flowers, including various combinations of colors, there are also solid color varieties available, such as the Yellow Four O'Clock. Four O'Clock is a herbaceous perennial, but it is often grown as an annual in colder climates. It belongs to the Nyctaginaceae family.
Four O'Clock plants are bushy and can reach heights of 2 to 4 feet (60 to 120 cm). The leaves are simple and ovate, typically green in color. The Yellow Four O'Clock variety produces flowers in a bright, solid yellow color. The flowers are trumpet-shaped and have a pleasant fragrance. They open in the late afternoon and stay open until the next morning, giving the plant its common name "Four O'Clock."
Four O'Clock typically blooms from mid-summer to fall, generally between July and October. The blooming period may vary depending on the local climate and growing conditions. The flowers also attract pollinators such as bees and butterflies.
Four O'Clock thrives in full sun to partial shade. It prefers well-draining soil and can tolerate various soil types, including sandy or loamy soils. It is relatively adaptable and can grow in both cool and warm regions. Four O'Clock is known for its ability to tolerate drought conditions and can handle hot, dry summers.
Four O'Clock is usually grown from seeds. The seeds can be sown directly in the garden after the last frost date in spring. They should be planted about half an inch (1.3 cm) deep in the soil. Four O'Clock plants are low-maintenance and do not require frequent watering. They are relatively pest and disease resistant.
Four O'Clock plants are popular for their attractive and fragrant flowers. The Yellow Four O'Clock variety adds a bright splash of color to the garden with its sunny yellow blooms. They are often used as ornamental plants in borders, flower beds, and container gardens.
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Scientific Name: Mirabilis Jalapa
Common Name: Four O’clock, Yellow
Plant Type: Tender Perennial
Native Range: Tropical America
Height: 12 " to 36 "
Spread: up to 30 "
Habitat: Garden, Waste Ground, Roadsides
Zone: 1 to 10
Exposure: Full Sun
Blooming Season: Spring and Summer
Attracts: Birds, Butterflies, bumblebees, ladybugs and Humming birds
Flower Shape: trumpet like flower
Flower Color: Yellow
Moisture: Dry /Moderate
Water Requirement: Medium, Average Water
Soil Type: Clay, Loam, Sand
Soil pH: 6.2-7.2
Uses: Beds and Borders, Ornamental, Rain Garden, Hedges and Screens, Patio and Containers, Road sides