Annual thinning to keep the plant productive and healthy by removing old or crossing branches.
Expert sources like Fiskars and NABU emphasize several golden rules: Alles über Gehölzschnitt - Verlag Eugen Ulmer Alles Гјber GehГ¶lzschnitt pdf
A radical cutback (often to 10–20 cm above ground) to revitalize old, overgrown shrubs. Essential Pruning Rules Annual thinning to keep the plant productive and