It seems almost everyone agrees that double fans increase faster than single fans, I asked a daylily seller why they recommended double fans over single fans and the only response I got was that they were less susceptible to root rot because a double fan would use more water than a single and thus be less prone to rot. Well, that was not the answer I was expecting, so why is it that a double fan would fare any better than two single fans planted apart? Is there anything that would cause two fans planted together to do better or benefit from each other?
