Saplings and underbrush spray?

got some spots that i need to spray that have a bunch of saplings and vines around? i had them all cut back and was gonna spray in the spring when they started growing but had to go out of town for a month and didnt get to do it so they grew back. can i spray then now, if so what should i use? or should i wait and cut them back when they come back out next year. just want something to spray, even its once a year to avoid cutting them back every couple yeas. thanks
Triclopyr Tordon or 24d will all take care of them this time of the year. None offer any residual in the soil though

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