Agreed with Alberto on this. It may do little or no harm to induce symmetry in, say, an African Violet for aesthetic reasons, but in general it is best to allow plants to grow to face the light as they please. This maximizes their ability to photosynthesize. There is no way humans can better a process that is controlled by the plants in this way. Aligning a plant with the main available light source-- not necessarily north or south-- is especially important for woody plants. A manzanita may never adjust itself to a natural growth pattern if its nursery directionality is "violated" when planted. This causes unnecessary stress for the plant and usually looks strange to us as well. Dylan Hannon Los Angeles CA On 14 February 2012 15:36, Robin Carrier <robin@no1bird.com> wrote: > what happens? > ----- Original Message ----- > From: "Alberto Castillo" <ezeizabotgard@hotmail.com> > To: "Pacific Bulb Society" <pbs@lists.ibiblio.org> > Sent: Tuesday, February 14, 2012 1:19 PM > Subject: Re: [pbs] Plants use Circadian rhytms to prepare for battle with > insects > > > > > > "For example, some plants that track the sun with their leaves during > the > > day are known > > to "reset" their leaves at night and move them back toward the east in > > anticipation of sunrise. " > > > > Some? Rather all. This is why it is wrong to turn plants around to get a > > "uniform" rounded appearance for Shows. > > > > I don't know the English expression for this but with woody plants it is > > most important to "respect the North" when transplanting or moving them > to > > a different spot. Meaning, they should retain the same orientation with > > respect to the cardinal points. > > > > > > > > _______________________________________________ > > pbs mailing list > > pbs@lists.ibiblio.org > > http://pacificbulbsociety.org/list.php > > http://pacificbulbsociety.org/pbswiki/ > > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > -- Where there is much desire to learn, there of necessity will be much arguing, much writing, many opinions; for opinion in good men is but knowledge in the making. — John Milton, *Areopagitica: A speech for the liberty of unlicensed printing to the Parliament of England*, 1644