For each gallon of dye required, you need 10 to 15 husks...green is better to work with. You can use other nut husks like Pecan, Butternut, or Hickory as well for different colours. Pre wash your cloth either in a washing soda/detergent, or 4 parts water/1 part vinegar bath. For the dye, bring 1 gallon of water to boil, add husks, and simmer one hour. Add rinsed fabric, and simmer until a wee bit darker than colour desired.. Rinse until water runs clear. If you do not, you will dye yourself...lasts for weeks it does. Wear gloves from start to finish including harvesting the nuts. You can dry the husks for use later, but if not dried, they will rot. You can also keep the dye solution used, by adding a wee bit of vinegar to it. Oh, did I mention wear gloves? A mordant to fix the dye is not needed. One last thing, do NOT do any of this in the wife's washing machine, use an old bucket.
Woody