If you don't mind cleaning up slugs.
Get some beer. (No, I'm not kidding it works)
Put the beer in some throw away plastic bowls.
Put one bowl close to the each group of flowers.

That above is just a temporary solution.

Scott's Grub x does a good job-be careful don't use too much.

Also, keep children and pets away after your spread this stuff

Scott's last longer than beer but the slugs could still come back the
next year or sooner

Greg Ro