Hibiscus syriacus
Rose of Sharon, tree mallow, Syrian ketmia: despite its species name, this hibiscus does not come from Syria but from East Asia — a misattribution by Linnaeus that has remained in botanical nomenclature. It is the only truly hardy hibiscus in our climates, capable of producing tropical-looking flowers in the open ground, even in cold regions.
Characteristics:
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Late and long flowering: from July to October, with single or double flowers in a range of colors, at a time when most shrubs have finished flowering.
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Hardy shrub: deciduous foliage; once well established, it withstands temperatures down to -15 °C.
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Late leafing: its leaves do not appear until May — do not assume it is dead in spring; this is its natural growth pattern.
Sowing advice:
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Position: sunny, warm and sheltered from cold winds; this is essential for abundant flowering.
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Soil: ordinary, deep, moist and well drained. It tolerates lime but is equally sensitive to prolonged drought and stagnant winter moisture. Adding compost at planting is beneficial.
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Method: soak the seeds for 24 hours in lukewarm water, then sow them in pots under cover in spring (20 °C). Germination requires patience; allow several weeks. See how to sow seeds.
Planting advice:
- Transplant into the open ground or into a large pot at least 40 cm deep, ideal for balconies and patios.
- Seed-grown plants produce flowers in varying colors, often different from the parent plant — that is the great appeal of propagating from seed.
Care advice:
- Water generously during the first few years and during droughts, especially when grown in a pot.
- Prune at the end of winter: Rose of Sharon flowers on the current year's wood, so hard pruning encourages flowering.
Benefits for biodiversity:
- Its large open flowers are frequently visited by bees and bumblebees, which push their entire bodies inside to reach the pollen.
- Its late-summer flowering fills an otherwise lean period for pollinators, when most shrubs have already finished blooming.
Uses:
- Flowering hedge, standalone specimen, border or container growing. Its flowers are edible and make an attractive addition to salads.
Symbolism:
Hibiscus syriacus is the national flower of South Korea, where it is called mugunghwa, the “flower of eternity”: its continually renewed flowering symbolizes the perseverance and immortality of the Korean people.
Harvesting your own seeds:
Leave the capsules to turn brown and dry completely on the shrub in autumn, until they open into five valves, then collect the brown, fluffy seeds inside. See how to store your seeds.
Our commitment to Quality: at SemiSauvage - Permaculture, we grow and select our seeds with respect for all living things as our guiding principle. Based near the Auvergne Volcanoes, we choose reproducible, non-hybrid varieties, tested for their germination rate, carefully sorted and packaged, with no chemical treatment. Our conviction: to give gardeners back the ability to sow, year after year, seeds that truly belong to them.
Add an exotic and sustainable touch to your garden with these Hibiscus syriacus seeds.
