"Karen" wrote:

check this out:
http://www.neatorama.com/2009/06/04/the-crack-garden/

Those are not cracks, those are channels chipped into the concrete. I don't
find it very attractive... it in no way looks natural and looks like
something someone who is not very decisive would do, in case they decide
otherwise they can patch those channels, but probably won't hold. Were I
going to assume the expense and go to the trouble of cutting channels I'd
just as soon remove it all in one fell swoop. And there's a big risk in
cutting channels with a jack hammer, it's more likely than not that the
concrete will break up in ways one didn't plan... could end up with a
disasterous mess, where the entire thing will need to be broken up and
hauled out, would probably end up costing more than had it been entirely
removed from the onset. Normally when one wants to remove a section of
concrete for a garden/water feature, etc, they would have it cut out neatly
with an abrasive wet saw... jack hammered channels in poured concrete look
awful... looks like something a mentally deficient juvenile would dream up.