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

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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1 Comment To "Where to poison tall weeds, top of weed or base/root"

#1 Comment By Alisma On 04/27/2017 @ 9:51 pm

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 ^[1]
Also, different herbicides are designed for broadleaf plants vs. grass, so choose an appropriate one for your situation.

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