Hi, Kevin,
Since you've been at this so long, I thought I should ask about how you handle the weeding problem. I spend a lot of time weeding my semps in pots. I try to never let seeds set on any weeds that crop up, make periodic passes to remove them all, use a top coat of fine stone, yet the weeds always seem to find a way into the pots. By the time I'm thru all the pots weeding, the ones at the beginning of the line need attention again. We have a nasty wood sorrel (oxalis) here that spreads easily and never seems to go away, there is always grass and a few other repeat offenders.
-t
