Chris I'd let nature take its course without tampering too much. In theory that's what the wells are there for - to collect litter, dirt and dead insects for nutrients. I would not be chucking raw organic material on mine but can't see that a bit of possum poo would be too harmful. Still, I don;t expect it's ever been tested. We will see as our baby re-emerged from the bush land last night into the trees above my broms.

sounds like nature at work to me, droppings from birds etc.,. would be their main source of nutrients in the wild, don't see the need for flushing if i understand your meaning just let them be they'll happily go through their cycle and provide bountiful blooms and colours.

len

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