Here is my first attempt at a phragmites arrow. This one is display only, as it is an arrow of light arrow for my son, but I am confident it would work just fine. Here the stats:
28" main shaft and 4" foreshaft made of a lilac shoot from my neighbor's yard. The spine is very near to some of my bamboo shafts, but quite a bit lighter. The entire arrow is 22 grams. It also straightens pretty easily, and with very little heat. It reminded me of roasting marshmallows--that light golden brown seemed to be the color when the nodes were perfect for bending. The Point is some sort of vodka bottle glass I found in the recycling dumpster (yes, I do dive--so sue me), and the sinew I also got for free from the game processor. So everything about this arrow was 100% free.