Kelly Duffie would know the best chemical control method for bullrush. It can spread pretty fast, but not as fast nor usually as deep as cattails. I've seen bulrush grow in sand and mud bottom, soft water & hard water. It grows well in clay bottom drainage ditches in most all of Ohio. IMO it is not too critical of soil type as long as it is not unconsolidated very loose organics. The tallest specie (Giant bulrush?) in optimum conditions may grow 5ft deep. Do your homework before planting. Be aware there are several species in at least two plant genera. There are numerous places in most all areas of the country it could be collected in the natural setting.
http://aquaplant.tamu.edu/plant-identification/alphabetical-index/bulrush/18"-100" is a big variation!
http://www.blackfootnativeplants.com/giant-bulrush-scirpus-validus/blackfoot-native-plants/10ft is pretty tall for a pond plant
http://www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/sci.htmlIMO most would do better for small pond use to use the smaller Juncus effusus rush.
http://www.illinoiswildflowers.info/grasses/plants/soft_rush.htmThere are other small rushes and sedges available that could be better than the bulrush or J.effusus. Do your homework before planting!
