Just spray heavily with the Round_up each time you go. Do a burn off if possible .

Proline; If you got the spray on the root-stem area of the plant you should still get some effect. You need 5 days for good translocation from the leaves. If you' re up there and it' s raining or the soil is puddled don' t spray. I' ve got caught with time constraints and ended up killing a few trees when the roundup made it into the soil water.

Dan O.