For those of you following the vermicomposting lettuce saga...we have reached the end of the experiment. For the last post, on day 23, see this previous entry. The romaine lettuce grown in the pot of worm casting compost is the picture of agricultural success, while the potting soil + fertilizer lettuce ended up pathetically small.
An unforeseen lettuce-challenging hurdle in this 60 day trial was my 2-week absence, during which time resident-lawnmower-man tended (that choice of verb may even be too generous) my plants. Despite my warnings about adequately watering the lettuce, I came back to a batch of tough and bitter lettuce, all except for the "worm" lettuce. Yes, the taste test today confirms that the worm lettuce is sweet and mild while the potting soil lettuce is not. Maybe the worm compost had better moisture-retentive properties, protecting it from stingy watering by a non-plantsperson. Moisture retention reportedly is one of the benefits of adding compost to your soil.