Genus guide
Corylus — 13 species
Corylus encompasses the hazels and filberts — multi-stemmed deciduous shrubs and small trees prized for edible nuts and ornamental catkins. They perform best in full sun to light partial shade and prefer consistently moist, well-draining soil with a pH of 6.0–7.5; they are sensitive to waterlogged roots. Cultivars such as 'Cosford', 'Nottingham Prolific', and 'Barcelona' are widely grown for nut production. Pet toxicity varies across Corylus species and growing conditions, so check each species individually before introducing one to a home with cats or dogs.
All Corylus species we cover
- American Hazelnut
- Beaked Hazelnut
- Chinese Hazel
- European Hazel 'Cosford'
- European Hazel 'Nottingham Prolific'
- European Hazel 'Witchford'
- Filbert 'Barcelona'
- Filbert 'Ennis'
- Hazel 'Red Filbert'
- Hazelnut 'Eta'
- Hazelnut 'Winkler'
- Trazel
- Turkish Hazel
Corylus — frequently asked questions
Are Corylus plants toxic to cats and dogs?
Most Corylus are pet-safe. Of the 13 Corylus species we cover, 8 are non-toxic on the ASPCA list and 5 carry a toxic or mildly-toxic rating. Even so, confirm the individual species before trusting it around pets.
How much light do Corylus plants need?
Most Corylus do best in direct sun. If yours stretches toward the window or loses its variegation it wants more light; scorched or bleached leaves mean it is getting too much direct sun.
Are Corylus easy to care for?
Some Corylus suit more experienced growers — several want strong light, sharp drainage or a specific seasonal rhythm. Check the individual species page for the exact regime.
How many Corylus varieties are there?
Growli's care library covers 13 Corylus species and varieties — browse them all above. They share a similar light, water and soil pattern, so once you learn one Corylus, the rest follow closely.
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