Thanks Arnold: As always from you, an interesting posting. The question is how do the bulbs get down to the lower depth, by what method, if in search of moisture, nutrients etc.. Cheers, John e. Bryan arnold trachtenberg wrote: > > John: > > I think that the movement of a bulb in the ground can be viewed very > differently than a bulb potted . I can't say what the motivation > (tropism) is behind the movement. It may be the bulbs desire to get > away from the heat of the sun or pulling itself deeper to get more water. > > Arnold > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php