Curious to know how frequently I should apply fertilizer to a patio of bent-gress. I have a good stand of grass but don't want to burn it out. Penncross bent-grass was the choice I went with. I'm located near Richmond VA with a typical hot and humid summer just beginning. Last year the patio turned dormant due to the drought we've been experiencing the past few years in this area. Not the case so far this year. I have heard that Ironite might be a good choice during these hot months, although I'll have to water frequently, which won't be a problem.