after the initial planting stage, how fast does it take for hair grass to grow and spread across? i've planted mine for 2 weeks+ now, seems quite slow to take off. is it better to trim first to stimulate faster growth? as the existing hair grass seemed to have been in emersed form previously. certain top parts seem to turn brown how about tonina? i notice the small top part looks great after 2 weeks. the mid and bottom part however look bad. i did not trim off the tonina prior planting, and it was about 8 to 10cm tall. i've read that we should trim to around 5cm before planting. probably a good idea as i can see some roots that begin to grow from mid stem.