Black-eyed Susan (Hibiscus trionum) is a plant in the annuals and biennials category that can grow 50cm – 1.5m tall and 10cm – 50cm wide.
This plant has several common names including: black-eyed Susan, bladder hibiscus, bladder ketmia, devil’s head in a bush, flower of an hour, flower of the hour, goodnight at noon, modesty, trailing hollyhock, Venice mallow or Venus’s mallow.
This is a deciduous plant that takes 1-2 years to reach full maturity.
Plant profile
Common name: black-eyed Susan, bladder hibiscus, bladder ketmia, devil’s head in a bush, flower of an hour, flower of the hour, goodnight at noon, modesty, trailing hollyhock, Venice mallow, Venus’s mallow
Scientific name: Hibiscus trionum
Plant type: Annual / Biennial
Habit: Columnar / Upright
Height: 50cm – 1.5m
Spread: 10cm – 50cm
Foliage: Deciduous
Sunlight: Full Sun
Soil: Loam, Sand
Moisture: Well drained
Garden type: City & Courtyard Gardens, Informal Garden, Patio & Container Garden, Sub-tropical
Planting type: Flower borders and bedding
Seasonal colors
| Season | Stem | Foliage | Flower | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
How to plant Black-eyed Susan (Hibiscus trionum) – Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, via Wikimedia Commons
Cultivation profiles – Growing Black-eyed Susan (Hibiscus trionum) – S Molteno, CC BY-SA 4.0, via Wikimedia Commons
