Planting Methods and Key Technical Points for Sorbaria kirilowii

Sorbaria kirilowii, scientific name: Sorbaria kirilowii (Regel) Maxim, also known as ganchailang, Kirilow's false spirea, spike-shaped t-degree stove, pearl tree, ganlangchai, rice curtain, and fish-roe flower shrub, is a shrub up to 3 m tall with spreading branches; the branchlets are cylindrical, slightly curved, smooth and hairless, green when young and reddish brown when old; the winter buds are ovate, acute at the apex, hairless or nearly hairless, reddish brown. The pinnate compound leaves have 13~21 leaflets, measuring 21~25 cm long including the petiole and 7~9 cm wide, smooth and hairless. It is a neutral tree species that prefers a warm and humid climate, likes light but also tolerates slight shade, and has strong cold resistance; it is distributed across many provinces and regions in China. It can be used as an ornamental plant and has high ecological value.

Morphological Characteristics

Shrub, up to 3 m tall, with spreading branches; branchlets cylindrical, slightly curved, smooth and hairless, green when young and reddish brown when old; winter buds ovate, acute at the apex, hairless or nearly hairless, reddish brown. Pinnate compound leaves with 13~21 leaflets, 21~25 cm long including the petiole and 7~9 cm wide, smooth and hairless; leaflets opposite, spaced 1.5~2 cm apart, lanceolate to oblong-lanceolate, 4~7 cm long and 1.5~2 cm wide, apex acuminate, rarely caudate, base rounded to broadly cuneate, margin sharply double-serrate, both surfaces hairless or with short pubescence in the vein axils, pinnate reticulate veins, lateral veins 15~23 pairs nearly parallel, prominent beneath; petiolules short or nearly absent, hairless; stipules membranous, linear-lanceolate, 8~15 mm long, apex obtuse or acute, entire or slightly serrate at the tip, hairless or nearly hairless. Terminal large dense panicle, branches spreading obliquely or slightly erect, 7~11 cm in diameter, 15~20 cm long, hairless, slightly white-powdery; pedicels 3~4 mm long; bracts linear-lanceolate, apex acuminate, entire, 2~3 mm long; flowers 5~7 mm in diameter; hypanthium shallowly campanulate, hairless on both inner and outer surfaces; sepals oblong, apex rounded-obtuse or truncate, entire, sepals about nearly equal in length to the hypanthium; petals obovate or broadly ovate, apex rounded-obtuse, base broadly cuneate, 4~5 mm long, white; stamens 20, equal to or slightly shorter than the petals, inserted on the edge of the disk; disk round-cup-shaped; carpels 5, hairless, styles slightly shorter than the stamens. Follicles long-cylindrical, hairless, about 3 mm long, styles slightly lateral, curved outward; sepals persistent, recurved, rarely spreading; fruiting pedicels erect. Flowering period June~July, fruiting period September~October.

Growth Habits

It is a neutral tree species that prefers a warm and humid climate, likes light but also tolerates slight shade, and has strong cold resistance. It is not demanding about soil, is relatively tolerant of drought and poor soil, and prefers moist, fertile, well-drained sites. The tree has a graceful form, elegant leaves, and large, luxuriant inflorescences; the small white flowers are as white as snow and fragrant. The spherical buds about to open are round and smooth like strings of pearls, and the flowers bloom like plum blossoms. The flowering period is long, up to 3 months, blooming successively; after the flowers fade, cutting off the inflorescences allows it to continue producing new flowering branches, and the second bloom is even denser and more beautiful, with the flowering period extending all the way to October.