Tropical Hibiscus
- Hardiness
- 9-11
- Mature size
- 4-10 ft (pot: 3-5 ft)
- Growth rate
- Fast
- Pollination
- Hummingbirds
- Bloom season
- Dinner-plate blooms all summer — each lasts a day, plant blooms for months
Hibiscus
Family Malvaceae
Hibiscus brings the garden its biggest, boldest summer flowers — wide silken trumpets that hummingbirds and bees treat as destinations. It comes in two personalities: tropical hibiscus, the glossy patio showpiece, and hardy hibiscus, the rose mallow that dies back and returns with dinner-plate blooms.
Which type you choose decides where it lives — across the two, hardiness spans zones 4 through 11, from a pot wintered indoors to a perennial that shrugs at northern cold. Either way the flowers are enormous and the pollinators grateful. Pick your hibiscus and give summer a headline.
Attracts hummingbirds
Attracts bees
Which hibiscus do you have?
Hardiness differs across the 2 hibiscuss in this guide, so pick yours and this panel answers for that one.
Enter it once; every plant page remembers.
Tropical Hibiscus
- Mature size
- 4-10 ft (pot: 3-5 ft)
- Growth rate
- Fast
- Pollination
- Hummingbirds
- Bloom season
- Dinner-plate blooms all summer — each lasts a day, plant blooms for months
Hibiscus · Common problems
Common hibiscus problems
Pests, diseases and weather to keep an eye on.
Nothing common enough to list for hibiscus. Watch it like anything else in the garden, and check the plants growing next to it.
Hibiscus · Which one do you have?
The 2 types this guide covers
Where these differ, the key facts above give the span across all of them. Each type’s own figures, as the catalogue records them:
Hardy Hibiscus (Rose Mallow)
- Hardiness
- 4-9
- Mature size
- 3-5 ft
- Growth rate
- Very Fast
- Pollination
- Bees; hummingbirds; specialist hibiscus bees
- Bloom season
- Mid-Late Summer — DINNER-PLATE flowers, up to 10-12 inches across
Hibiscus · Growing & propagation
Growing hibiscus
Light, water, soil, propagation and the season’s jobs.
Hibiscus merges several types whose light, water and soil needs differ — the care groups and the growing playbook carry what applies to each.
Hibiscus · Calculators & field guides
A little help in the garden.
Calculators for the figures. Field guides for the hands-on work.
Hibiscus · Yearly calendar
The hibiscus year, month by month
What hibiscus asks for, month by month.
No fixed season calendar for hibiscus — its care follows conditions, not the calendar.
Hibiscus · Ecology & uses
Ecology & uses
What it does for the garden, and what it is grown for.
Hibiscus in the garden system
- Nectary/insectary
Attracts- Hummingbirds, Bees
Deer- Browsed
Protect young plants
What hibiscus is grown for
✓ Not known to be toxicGenerally safe (mild)
Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.
Hibiscus · Varieties & cultivars
Choosing a hibiscus variety
Match the plant to your climate, season and available space.
Compare hardiness, mature size, growth habit, days to maturity and intended use in the seller’s variety description. Where this guide covers several plant types, start with the type you want to grow, then choose a variety for your season and space.
Sources & plant identity
Know what you’re growing.
See where the knowledge comes from.
Hibiscus
The plant, at a glance.
- Plant family
- Malvaceae
- Invasive risk
- Low
Every garden is different.
Hardiness, size and timing vary with your cultivar, soil and climate.
Rooted in research.
University extension research, brought together with hands-on growing experience at Story Thyme Farms.
Explore Hibiscus’s sources4 reference links
for Hibiscus
for Hibiscus
Research from these sources
Publisher marks identify sources, not sponsorship or endorsement.
Questions
Hibiscus questions, answered straight.
Is hibiscus safe for kids and pets?
Hibiscus is commonly eaten and isn't considered toxic, but "commonly eaten" isn't a guarantee for any particular person or animal — allergies, quantity, and which part you eat all matter. One caveat on this one: Generally safe (mild. Never eat a plant you haven't positively identified, and check with a vet before letting pets or livestock graze anything new.
Elsewhere
Where hibiscus sits in the library.
Sunflower
Zinnia
Peony
Daylily