I've read that you can wick by overwatering top to bottom and letting the wicks suck up the extra water, this way the lateral roots are also watered.

I learned a hard lesson about lateral rooting, I had transplanted a few plants growing in large styro cups, the first few times I cut the cups open the soil fell apart along with some rooting so I was afraid they would be damaged, so the next few I just cut the bottom of the cup off and put them in the soil which was a mistake, the plants growth was stunted and when I finally pulled them after they were harvested the root cluster hadn't grown much beyond the original styro. cup. I called them runts and didn't bother to clone them but it wasn't their fault it was mine! LOL They produced the best bud of the bunch too.