Pollarding techniques are a form of very heavy crown reduction and only performed on deciduous trees such as: Willows, Oaks, Horse Chestnuts, Beeches, Limes, and London Planes etc.

Trees with very heavy crowns and branches such as Willows and Horse Chestnuts tend to be prone to break outs and splits. Pollarding is a method of reducing the weight on those branches considerably, thus reducing the risk of failure. Pollarding causes the tree to generate extensive new growth and once pollarded, it is important to re-pollard or perform a normal crown reduction, every two – three years, to maintain the crown's ideal balance.