Contorted Filbert

Corylus avellana 'Contorta', also called Harry Lauder's walking stick, is a slow-growing deciduous ornamental hazel with strongly twisted branches. Its contorted framework remains a distinctive feature as the plant develops its rounded, multi-stemmed form. ## Form and season NC State reports a height and width of 8–10 feet and lists USDA Plant Hardiness Zones 4a–8b ([NC State Extension](https://plants.ces.ncsu.edu/plants/corylus-avellana-contorta/)). The Royal Horticultural Society gives a broader mature size range of 2.5–4 metres in both height and spread; these are published estimates, not a guarantee for an individual site ([RHS plant profile](https://www.rhs.org.uk/plants/97648/corylus-avellana-contorta/details)). Yellow hanging catkins appear in spring before leaf-out ([NC State Extension](https://plants.ces.ncsu.edu/plants/corylus-avellana-contorta/)). The RHS rating H6 is specific to the UK and is not a USDA zone. ## Conditions Full sun to part shade and moist, well-drained soil suit this selection; NC State notes that it tolerates occasional dryness once established and advises avoiding wet conditions ([NC State Extension](https://plants.ces.ncsu.edu/plants/corylus-avellana-contorta/)). Root suckering can occur, especially on grafted plants, so inspect the base and remove shoots that obscure the intended contorted framework ([University of Connecticut Plant Database](https://plantdatabase.uconn.edu/detail.php?pid=132)). ## Fruit Fruit reports conflict: NC State describes edible nuts and the RHS says brown fruits sometimes follow, while the University of Connecticut cultivar note says plants do not fruit ([NC State Extension](https://plants.ces.ncsu.edu/plants/corylus-avellana-contorta/), [RHS plant profile](https://www.rhs.org.uk/plants/97648/corylus-avellana-contorta/details), and [University of Connecticut Plant Database](https://plantdatabase.uconn.edu/detail.php?pid=132)). Treat fruiting as variable and grow it primarily for its ornamental stems. ## Maintenance Root suckering can occur, especially on grafted plants, so inspect the base and remove shoots that obscure the intended contorted framework ([University of Connecticut Plant Database](https://plantdatabase.uconn.edu/detail.php?pid=132)). Remove dead or damaged branches as needed and preserve the twisting structure with selective pruning.