Begin training a plant during the dormant season following planting.
This pruning technique works best for shrubs such as overgrown spirea, forsythia, cane-growth viburnums, honeysuckle and any other multiple stemmed shrubs that are otherwise healthy. Within one growing season, these shrubs will look like new plantings, full and natural shaped.
Apr 20, Spring-flowering shrubs, such as lilac and forsythia, develop buds that will display the following year during the previous year’s late summer and early fall. If you prune during fall or winter, Estimated Reading Time: 5 mins.
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May 24, Pruning often stimulates flowering and can improve the structure or form of a shrub. Pruning methods Shearing Oversheared azaleas. Using manual hedge clippers or electric shears to swiftly cut through shrubs to prune them into a variety of geometric shapes. It is the quickest method of pruning. Plants suitable for this pruning: Cotinus (smoke bush) Forsythia Magnolia Syringa (lilac).