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Q.

Where to poison tall weeds, top of weed or base/root

Zone Seaham, County Durham | kevin added on April 27, 2017 | Answered

My garden's massively overgrown, so I've decided to poison it, but I would like to know if by spraying poison at the top of a weed is ok. Or, is it best to poison it at the base of the weed?

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Alisma
Certified GKH Gardening Expert
Answered on April 28, 2017

It depends on the type of herbicide- some should be applied to leaves, others will be absorbed into the plant through the base/root. First, choose the right type of herbicide, then follow the label instructions. The label will tell you how to use it.

You want a post-emergent herbicide as described in this article:
https://www.gardeningknowhow.com/plant-problems/weeds/using-herbicide-in-gardens.htm
Also, different herbicides are designed for broadleaf plants vs. grass, so choose an appropriate one for your situation.

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