Sorbaria sorbifolia, more commonly known as false spirea, is a deciduous shrub native to central and northern Asia; produces a large roundish mass, 1-2 meters high and as wide; the stems are thin, dark, arched; they bear numerous large pinnate leaves, consisting of small oval or lanceolate leaves, with a serrated edge, dark green. From late spring until mid-summer it produces long panicles of white flowers, very showy, which bloom slowly. There are varieties with young leaves that are light green or reddish. Shrub of easy cultivation, very common in gardens; to obtain a compact and very dense shrub it is advisable to prune the plant in early spring, so as to keep the lower part densely branched. It produces numerous suckers, which develop rapidly, so it is advisable to remove them if you want to contain the size of the plant.
Regarding the correct exposure of false spirea plants it is appropriate to say that Sorbaria sorbifolia prefers sunny or semi-shady locations; it is a rustic shrub that does not fear the cold and bears even intense and prolonged frosts without problems.
Thanks to its resistance, this plant can be grown without problems in the open ground and where the winter climate reaches even rigid temperatures.
As far as water supply and watering methods are concerned, it is good to say that, as a general rule, Sorbaria sorbifolia, being a rustic variety, is satisfied with rain water. In the case in which one incurs a period in which a strong drought predominates, above all in the summer period, then it is advisable to water the plant, verifying that between one watering and the other the ground is well dry; in winter it does not need watering, as the shrub is in vegetative rest on arrival and the first cold of autumn.
The false spirea plants adapt to any soil, even to the common garden soil; at the time of its planting it is advisable to enrich the soil with soft universal soil rich in organic matter.
In the spring, spread a slow release granular fertilizer at the foot of the plant.
Check that the soil allows proper water drainage, as water stagnation could cause root rot that would compromise the correct development of the plant.
The multiplication for this type of shrubby plants takes place by seed at the end of winter, in February-March, keeping the seedlings in a sheltered place; or it propagates by semi-woody cuttings, in exact, remembering to wet the cuttings very frequently and to cultivate them in a not too dry place, leaving them to develop before finally planting them.
Falsa spirea - Sorbaria sorbifolia: Pests and diseases
In general, this type of plants, being rustic, are not affected by pests or diseases, although it can happen that aphids attack floral panicles. In the presence of parasites it is advisable to promptly intervene by using specific products available in numerous formulations on the market, so as to effectively and quickly counter the spread of the problem.