Thanks for the advice Millet. I like to leave them outside, exposed to the wind (as opposed to on my west-southwest facing window which is where they were at first) for the reasons you stated but I was asking for trouble by not anchoring them. Luckily, only two fell over and it wasn' too bad. On the upside, I am learning a lot and am enjoying the experience (although my wife teases me that it reminds her of elementary school science class with growing seeds in a cup
).
BK