Jane McGary wrote: "Growing in rock crevices benefits plants in many ways: a lack of temperature fluctuation (especially heating) in the root run; trickling water from night-time condensation on the rock surface, especially in foggy areas; and, of course, protection from predators." I wish I had read that a couple weeks ago before I began digging up some bulb beds that have a lot of rocks added. It is not a "rock garden" so much as a garden made with rocks. I did not notice the bulb roots shaping to rocks other than when they were so very crowded that their physical size was limited to squeeze between the rocks. But this late in the season the roots are so far withered that I may easily have overlooked rock-seeking roots. I have often marveled at how very little water these bulbs seem to need, not just the bulbs but also volunteer "weeds" I allow to grow that have sown themselves and continue to thrive all summer long despite no rain since May (and little then). I have seen dew condense on the rocks, especially on the vertically-set slate. Dew forms most mornings so this is likely the source of moisture. There are a few more pockets of bulbs left to excavate from between the slate pockets. I will watch for any growth patters that might be taking advantage of this dew-trickling. Here is a photo of the slate dividers: http://flickr.com/photos/gastils_garden/… and the "boulders" bordering one of the raised bulb beds, which I am completely renovating this season: http://flickr.com/photos/gastils_garden/… - Gastil