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The lower part of the hedge is thin and bare, ie bare branches. The top is flourishing with new growth.

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    Hi Chris, a picture that shows what plant the hedge is made of would help and your location.
    – kevinskio
    Commented Jun 15, 2023 at 13:18
  • If a hedge is only pruned at the top, essentially all growth will be at the top. Sounds like improper pruning. Commented Jun 15, 2023 at 16:10

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At the level of detail provided in the question:

Narrow the top so the bottom gets sunlight.

However, depending on the plant, that may be "too little, too late" to actually bring back where branches have died back to the trunk, in which case the answer is to replace with new plants and keep them trimmed "narrow on the top" to keep them in active growth on the bottom.

Hedges which are vertical or spread outwards on the top do tend to die out on the bottom, primarily due to lack of light.

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  • Yes, two basic principles: 1) hedges get denser if they are pruned frequently; 2) hedges die off at the bottom if they aren't significantly wider at the bottom than at the top. Commented Jun 16, 2023 at 1:02
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I was wondering if you have tried epsom salt on or around your hedges? With pruning it regularly, this could be a sufficient filling for your shrubs!

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    Commented Jun 23, 2023 at 11:53

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