This shows grasses and stuff growing out of an upside down plant.
This shows grasses and stuff growing out of a right side up plant (please note that the big blurry green thing on the left is the actual pea plant- not a weed :). There arent many grasses and weed and stuff in the right side up ones)



I've also noticed that some of the upright plants have holes in the leaves and yukky debris and stuff in them. Once i found a cricket in one of the bottles, so in my discussion, I'll probably include how growing plants upside reduces risks associated with pests.
I don't know if its coincidental or whatever, but the upside down ones seem to have more grasses and stuff growing out of the top, compared to the ones right side up. It could be coincidental, since i used a mixture of half compost, half organic potting mix. Seeds could have also been distributed through wind or birds or whatever and the upside down plants have a clearer opening, with no plant in the way.
will include a picture of my plants in the next post
oh yeh- and for the table below, the heights are in cm's, measured with a plastic ruler (the same one used each time) and a measuring tape for when the upside down ones started curving up.