Originally Posted by Darkman

Hi Dan,

I'm not sure that is going to help. I think it will just slow it (growth) down. As the corm grows and it produces pups it's mass increases. As a result it has to do one of two things. Compress (sink) the soil or push the soil off it's top as it swells in volume and the top of the corm gets closer to the soil level. The corm not a root doesn't lengthen as much as it swells. All of my older mats appear as if I planted them on little mounds. I know that it isn't the mulch as it breaks down into almost nothing. I'd leave the water flow as is if it is working for you.