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Pat from Ontario Oregon writes

Can Hi - Yield 2, 4 - D Selective Weed Killer be used to kill goatheads (puncturevine) surrounding our Arborvitae trees?

Answer:

Hi - Yield 2, 4 - D Selective Weed Killer is not labeled to be used around trees for broadleaf weed control. Roundup Quick Pro can be used to spot treat actively growing weeds around desirables as it will not leach in to the soil on only kill the weeds/grasses where applied. 

Southern Ag Surflan A.S. Herbicide is labeled for pre-emergent control of puncturevine weeds around arborvitaes trees. Pre-emergents should be applied before the weeds start to germinate in early spring though summer and after increased rainfall. Seedlings can stay in the soil for 3-6 years so repeat applications will be required each season to gain control. 

Answer last updated on: 08/29/2021

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