Hibiscus moscheutos 'Sparkle' EXTREME SPARKLE swamp mallow, hardy hibiscus
Symbivit Tric (arbuscular)
Symbivit (arbuscular)Hibiscus
Swamp mallow and its hybrids have been sought after plants for the past few years now. They are perennials with sturdy stems that have large, tropically looking flowers. This variety was bred by Cornelis A.Oostveen from the Netherlands who specializes in large-flowered hardy hibiscus and has introduced some of the finest compact varieties such as Oak Red, Extreme Hot Pink, and Extreme Magenta. Patent No. PP21798 was issued in 2011.
EXTREME SPARKLE is a unique swamp mallow variety with medium large flowers - 18-19 cm across. They are not pure white like older varieties, their petals show prominent pink venation towards the pink eye in the centre. Flowering begins in August and depending on plant's age and fertilizing new flower buds can be formed till September or October. Deciduous leaves are deep green, ovate with a narrow tip, and in autumn turn golden yellow with red veins.
The breeder claims an overall plant height of 50-60 cm, however, hardy hibiscus sizes can vary a great deal with location so count on a little less in poor or compacted or sandy ground, and perhaps a lot more in fertile, moist or wet ground. Its has upright stems yet the plant gets wider than tall.
The plant is dependent on regular watering and feed supply. Use fertilizers with enough phosphorus for abundant flowering, or any other quick-release fertilizers where nitrogen is not predominant. Any fertilizing has to stop by end September. Still, nitrogen-based fertilizer is useful when the plants wakes up from dormancy in mid spring, but should not be used longer than 8 weeks. Hardy hibiscus emerges very late, sometimes as late as in late May.
Last update 13-08-2018
For healthy growth and profuse flowering it needs a sunny location with a lot of moisture which can be achieved by good mulching. The soil has to be fertile and permeable, never let it dry out either in summer or during dry winters - its fleshy roots need some moisture also in winter. Hardy to min. -23�C (USDA zone 6). Cut back the plant only a few centimetres above ground level in spring.
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- STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
- DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
- EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
- STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
- HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
- SHRUB - a woody plant with branches growing bushy from the ground level.
- HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
- FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
- GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
