Can other plants become established near creosote or is the natural herbicide it puts out too much for any plants?

I was thinking about getting some 1-gal fairydusters or penstemons to plant in the vicinity of some of my large (8-10 ft tall) creosote bushes for a little pizzaz in the front yard. I probably wouldn't have them any closer than, say 4-5 feet away - I felt like the creosote would offer some good afternoon shade and help them get established.

Of course, I'm just pre-planning - I'm not planting anything until late Sept or early Oct! :-)

TIA