A new and distinct cultivar of winter-hardy, herbaceous, perennial, hybrid Hibiscus plant named Summer Carnival comprising an upright habit of multiple, well-branched, basal stems producing flowers near the top of the plant. Flowers are hot cerise, and the calyces display light green sepal centers and pale yellow margins while in bud and after flower drop. The foliage is primarily three-lobed, deeply incised, and grayish-green with creamy irregular margins frequently blushed with reddish purple. The stems exposed to high ultraviolet light develop reddish coloration.

A new and distinct cultivar of winter-hardy, herbaceous, perennial, hybrid Hibiscus plant named Holy Grail comprising a rounded mound habit of multiple, well-branched, basal stems producing flowers from the bottom to the top of the plant from late July to early September. Flowers have petals with strong red with dark red shiny eye set off with column of light yellow pollen. The foliage is ovate to rarely three-lobed, and deep mahogany-colored and the light green calyces provide sharp contrast.

A new cultivar of Hibiscus plant named Lanchippewa that is characterized by its uniform flowers that are bright orange in color with pink and yellow veins, its floriferous habit with flowers that last for 2 to 3 days, its early blooming and freely flowering habit, its compact and self-branching plant habit, and its foliage that is resistant to pathogens common to Hibiscus, including Pseudomonas sp., Phythium sp., and Phytophthora sp.

A new cultivar of Hibiscus plant named Lanwyaconda that is characterized by its uniform flowers that are shades of pink in color being darker pink in the centers and becoming light rose on the edge of the petals, its flower petals with wavy and curled edges, its floriferous habit with flowers that last open over 3 days, its early blooming and freely flowering habit, its strong flowering stems with upright facing flowers, its compact and self-branching plant habit, and its foliage that is resistant to pathogens common to Hibiscus, including Pseudomonas sp., Phythium sp., and Phytophthora sp.

A new and distinct cultivar of Hibiscus plant named Ivory Wind, characterized by its upright, uniformly mounded plant habit appropriate for container production; freely branching habit, dense and bushy appearance; glossy dark green-colored leaves; uniform and freely flowering habit; large ivory white-colored flowers with dark red-colored centers; and good postproduction and garden performance.

A new and distinct Hibiscus plant having large, yellow colored flowers with a white colored throat that last for several days on the plant over a long flowering season.

A new and distinct Hibiscus plant having white colored flowers with light yellow colored highlights that last for several days on the plant over a long flowering season.

A new and distinct Hibiscus cultivar named MINSYPIN3 is disclosed, characterized by large, single, pink flowers with a darker eye, up to 12 cm in diameter. Plants are well-branched, upright and vigorous. The new variety is a Hibiscus, normally produced as an outdoor garden or container plant.

A new and distinct Hibiscus cultivar named MINSYRE10 is disclosed, characterized by large, single, dark magenta flowers with a darker eye, up to 11 cm in diameter. Plants are well-branched, upright and vigorous and have been observed to have some resistance to Sclerotinia. The new variety is a Hibiscus, normally produced as an outdoor garden or container plant.

A new and distinct Hibiscus cultivar named MINSYMACWHI1 is disclosed, characterized by large, white flowers with large red eyes. Plants are floriferous and tolerate wet conditions well. The new variety is a Hibiscus, normally produced as an outdoor garden or container plant.