Hibiscus trionum grow and care – shrub of the genus Hibiscus also known as Flower of an hour or Bladder hibiscus, Hibiscus trionum annual and used as ornamental plant for the leaves and flowers, can grow in subtropical, mediterranean, temperate, desert or tropic climate and growing in hardiness zone 5+.
Leaves color green in rhomboid deeply lobbed shape.
How to care: Add fertilize at least once, put mulch to keep the soil moist, organic matter and humus
What is the best way to start growing? Plant / Seed / Vegetative Reproduction – cutting
Is it necessary to graft or use vegetative reproduction? No, it’s easier to start by seeds and not need to start by cutting, in cold climate it is possible to sow it in the winter indoor and start by cutting the end of the winter after the last frost to take it out
Difficulties or problems when growing: Invasive
Recommended planting season? End of winter to summer in hardiness zone 10b, spring in hardiness zone 5-8, spring to summer in hardiness zone 9-10a but better in the spring
How to plant: Dig hole bigger 50% more than the roots ball, add to the hole, organic matter, dead leaves and hummus put back some soil and mix it, after this put the plant cover lightly but strong enough that won’t fall put support for the plant if needed, if the plant is not stable consider to prune, water it twice in the first day and every day for two weeks.
Pests and diseases: Nematode, galls, aphids, mealy bugs
Pruning season: All growing season
How to prune: Just for design
Size of the plant: 30-50cm, 12-20 inches
Growth speed in optimal condition: Fast growing / Medium growing
Water requirement: Average amount of water / Big amount of water (especially in the desert and in hot summer climate)
Light conditions in optimal condition for growing: Full Sun / Half Shade (will bloom better in full sun)
Is it possible to grow indoor as houseplant? No
Growing is also possible in pots, planter, flowerpot or containers: Yes, when growing in container need at least 10-15L (2-3 gallons) can grow in bigger, soil can be potting soil, mixture of peat soil and perlite or other light mixed soil, water it regularly and care when put bottom for the pot be aware not to let the water stay there too many days, need to add humus, organic matter, fertilizer and mulch to cover the soil to keep it moist.
Bloom season: Spring / Summer / Autumn
General information about the flower Trumpet shape in white or yellow color, the inner part is red-bordeaux
Pollination is done by: Bee, self-pollination
How to grow Hibiscus trionum from seeds
Sowing requirement: Moist soil, temperature 15-26C (59-80F), humidity, full sun or half shade
Saving seeds and care until sowing: Dry and dark location
Sowing season: End of winter to summer in hardiness zone 10b, spring in hardiness zone 5-10a but better to do it by the temperature 15-26C (59-80F),
How to plant: Plant in soil that stay moist and don’t let the soil dry
Planting spacing: 3*5cm to transplant and better not to transplant it before 5 leaves, direct it’s depend how the
Depth of Sowing: 0.5-1cm (0.25-0.5 inch) but cover lightly
Conditions for seeds germinate: Full sun, moist soil
Watering requires for Seeds: Average amount of water / Big amount of water
Germination time: 10-20 days
Condition of seedling: After five leaves possible to add fertilizer, put mulch
Alternative names: Flower of an hour, Bladder hibiscus, Venice mallow