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Buckthorn and Honeysuckle herbicide questions

15 years ago

I have been cutting and and painting the stumps of Common Buckthorn this fall with Garlon 4 in mineral oil (1 part G4 to 3 parts oil). I am wondering how long into winter can I do this and still have it be effective? Will it work even after the soil is frozen? Also, will Garlon 4 in oil work on shrub honeysuckles (Tartarian and Morrow)? I have found conflicting information on this, some sites I have read say Garlon is not effective on honeysuckle and others say it is.

Comments on your experience with killing buckthorn and shrub honeysuckles would be nice too.

Thanks

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