Hibiscus syriacus 'Minomb' SUP'HEART
Hibiscus syriacus 'Minomb' SUP'HEART
Rose-of-Sharon
Rose-of-Sharon
| SIZE/TYPE | medium-sized shrub |
|---|---|
| taller shrub | |
| USUAL HEIGHT | 1.5-3m |
| USUAL WIDTH | 1-1.5m |
| LEAVES | deciduous broadleaf |
| COLOUR OF LEAVES |
 green |
| FLOWERS | showy |
| COLOUR OF FLOWERS |
  combined:white and deep red
|
| BLOOMING TIME | July - September |
| LOCATION | full sun |
| SOIL TYPE | neutral to alkaline |
| SOIL MOISTURE REQUIREMENTS | evenly moist (dislikes drought) |
| USDA zone (lowest) | 5 (down to -29°C) |
| WINTER PROTECTION | |
| FOR ZONE 5+6 |
|
| FOR ZONE 7 |
|
| BELONGS TO CATEGORIES |
Deciduous broadleaf Summer blooms Hedging plants |
Rose-of-Sharon deserves more attention for its abundant flowering in summer. These maintenance-free shrubs come from eastern Asia and are the inevitable ingredient of every summer garden which they highlight with a wide range of coloured flowers. There has been a number of cultivars available since its discovery. They have various bloom colours, shapes and sizes, as well as variegated leaves. SUP‘HEART® is an improvement over an older variety Red Heart selected by French nursery Pepinieres Minier. It was granted an EU patent 37690 in 2014.
SUP‘HEART® Rose-of-Sharon produces snow-white, large flowers that are 10-11 cm across, and decorated with a small deep maroon eye. Some flowers have 5 but others bear 6 of them which makes them rather interesting. Flowering begins in July and lasts until all buds have gone - sometimes by end September. The plant grows into a densely branched, upright shrub. SUP’HEART® Rose-of-Sharon was awarded AGM (Award of Garden Merit) by the British Royal Horticultural Society (RHS) in 2020.
It has very decorative leaves that are unique. They are deeply lobed, palmate, mid to dark green and coarsely toothed. If they turn yellow in summer the plant manifests too much water at the roots. They are either over-watered or planted in too heavy soil where it has not established yet.
Pruning is an issue that always gets me started here. Hard pruning leads to larger flowers, that's true, but also production of long, immature, flexible twigs. The only cut I recommend is such that rejuvenates old plans – prune it hard in early spring by 50-75 % and let it grow for another 10 years or so.
Rose-of-Sharon is quite adaptable of soil type. It can take drought but does not look good if dry for too long. It loves moisture fully established plants thrive on occasional flooding in summer, but you cannot transplant it into standing water. Old plants dislike peat. Selective fertilizers enhancing flowering are convenient but not crucial. Place it in full sun only. Fully hardy to min. -27 °C (USDA zone 5) and not suitable for pots.
Last update 20-09-2021
SUP‘HEART® Rose-of-Sharon produces snow-white, large flowers that are 10-11 cm across, and decorated with a small deep maroon eye. Some flowers have 5 but others bear 6 of them which makes them rather interesting. Flowering begins in July and lasts until all buds have gone - sometimes by end September. The plant grows into a densely branched, upright shrub. SUP’HEART® Rose-of-Sharon was awarded AGM (Award of Garden Merit) by the British Royal Horticultural Society (RHS) in 2020.
It has very decorative leaves that are unique. They are deeply lobed, palmate, mid to dark green and coarsely toothed. If they turn yellow in summer the plant manifests too much water at the roots. They are either over-watered or planted in too heavy soil where it has not established yet.
Pruning is an issue that always gets me started here. Hard pruning leads to larger flowers, that's true, but also production of long, immature, flexible twigs. The only cut I recommend is such that rejuvenates old plans – prune it hard in early spring by 50-75 % and let it grow for another 10 years or so.
Rose-of-Sharon is quite adaptable of soil type. It can take drought but does not look good if dry for too long. It loves moisture fully established plants thrive on occasional flooding in summer, but you cannot transplant it into standing water. Old plants dislike peat. Selective fertilizers enhancing flowering are convenient but not crucial. Place it in full sun only. Fully hardy to min. -27 °C (USDA zone 5) and not suitable for pots.
Last update 20-09-2021
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