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It's unfortunate the you have received conflicting advice on such a basic question. From here or here or here

Topping is perhaps the most harmful tree pruning practice known. Yet, despite more than 25 years of literature and seminars explaining its harmful effects, topping remains a common practice.

Topping a tree can cause a cascade of problems

  • sun damage to previously shielded branches
  • insect damage when they move in to the large cut
  • nutrient stress
  • poor growth habit

It is the last that is the most relevant to you when you have a large tree. Should you get the tree topped the new growth at the top will be weakly attached. Sooner or later a wind storm will tear the new branches off. As the owner of the tree you are liable for anything the tree falls on. Your or your neighbour's insurance could have a field day with any claims if it can be shown that poor pruning contributed to any incidents.

Check out this answeranswer to another redwood question for what your tree really needs. If the tree is too big or poorly placed then don't prune it, remove it.

It's unfortunate the you have received conflicting advice on such a basic question. From here or here or here

Topping is perhaps the most harmful tree pruning practice known. Yet, despite more than 25 years of literature and seminars explaining its harmful effects, topping remains a common practice.

Topping a tree can cause a cascade of problems

  • sun damage to previously shielded branches
  • insect damage when they move in to the large cut
  • nutrient stress
  • poor growth habit

It is the last that is the most relevant to you when you have a large tree. Should you get the tree topped the new growth at the top will be weakly attached. Sooner or later a wind storm will tear the new branches off. As the owner of the tree you are liable for anything the tree falls on. Your or your neighbour's insurance could have a field day with any claims if it can be shown that poor pruning contributed to any incidents.

Check out this answer to another redwood question for what your tree really needs. If the tree is too big or poorly placed then don't prune it, remove it.

It's unfortunate the you have received conflicting advice on such a basic question. From here or here or here

Topping is perhaps the most harmful tree pruning practice known. Yet, despite more than 25 years of literature and seminars explaining its harmful effects, topping remains a common practice.

Topping a tree can cause a cascade of problems

  • sun damage to previously shielded branches
  • insect damage when they move in to the large cut
  • nutrient stress
  • poor growth habit

It is the last that is the most relevant to you when you have a large tree. Should you get the tree topped the new growth at the top will be weakly attached. Sooner or later a wind storm will tear the new branches off. As the owner of the tree you are liable for anything the tree falls on. Your or your neighbour's insurance could have a field day with any claims if it can be shown that poor pruning contributed to any incidents.

Check out this answer to another redwood question for what your tree really needs. If the tree is too big or poorly placed then don't prune it, remove it.

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It's unfortunate the you have received conflicting advice on such a basic question. From here or here or here

Topping is perhaps the most harmful tree pruning practice known. Yet, despite more than 25 years of literature and seminars explaining its harmful effects, topping remains a common practice.

Topping a tree can cause a cascade of problems

  • sun damage to previously shielded branches
  • insect damage when they move in to the large cut
  • nutrient stress
  • poor growth habit

It is the last that is the most relevant to you when you have a large tree. Should you get the tree topped the new growth at the top will be weakly attached. Sooner or later a wind storm will tear the new branches off. As the owner of the tree you are liable for anything the tree falls on. Your or your neighbour's insurance could have a field day with any claims if it can be shown that poor pruning contributed to any incidents.

Check out this answer to another redwood question for what your tree really needs. If the tree is too big or poorly placed then don't prune it, remove it.