I've only done it in the back yard which is also the dog run, so it can go longer before the first mowing. Even then, finally I couldn't stand it anymore and ended up push mowing that part, and mowed around the Daff foliage. As soon as it starts really yellowing, I go ahead and mow it. I'm glad I only experimented with naturalizing the Daffs there, because it would drive me nuts otherwise, LOL. When I lived in a wooded area, I naturalized some right at the forest's edge, and that worked out very well. Crocus on the other hand, are great naturalized in the lawn- you only have to keep the mower on a higher setting and they're just fine.
