Pruning is typically done in the dormant season, winter. It's good to start after harvest and finish before the weather starts to warm up in the spring. Try and finish by April.
hazelnut pruningCut all but 4 to 5 trunks, and cut all other "watersuckers" that grow each year, and do nothing else. This is proven for best yields. This is for common filibert (Corylus avelana), for Turkish hazelnut (Corylus colurna) leave just one trunk, anyway it grows usually as big tree, so pruning is not necessary.See pictures on: forestryimages.org
Another name for the hazelnut tree is a Filbert.
Your English is incorrect, should read, "How do you prune an olive tree?"
You can prune it but the symmetrical shape that makes it attractive will be wrecked. If you do prune only tip prune.
If you wanted to prune a tree, you will need a Class 1 fulcrum.
The tree, Hazel (Corylus avellana), does produce hazelnuts.
AnswerIt was not really necessarily because normally on the packet it say they are natural, so NO they are not normally sprayed.I know this because i have a hazelnut tree and I don't spray them and they are never bitter so if you are a hazelnut lover get a hazelnut tree.
Hazelnut (Corylus) is a small tree or shrub with a fibrous root system so the do not grow big roots, at the most twice the spread of the tree.
Corylus avellana the hazelnut tree.
prune them
A hazelnut is a tree nut. Its scientific name is Corylus avellana, and is normally used in foods such as nut spreads, breakfast cereals, and desserts such cookies or cakes.
A hazelnut tree will produce nuts about four to five years after it has been planted. However, these nuts may be small in size or few in number. It can take another two to three years for the tree to become heavy producer.