How do i get rid of black ants on my hydrangea bushes?

Any way to get rid of them without harming my bushes. the bulbs are starting to come out and there full of black ants.

Answers:
get a bottle of "ortho" bug-b-gone concentrate and a tank sprayer, follow directions on the bottle

Other answers:
Maybe the ants are harvesting from aphids. Kill the aphids with soapy water.
Maybe the ants are harvesting from aphids. Kill the aphids with soapy water.
yep, washing up liquid works a treat on killing ants - not sure what it does to hydrangea though!
burn them
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