#1293 GIANT BROOM SORGHUM-HEIRLOOM 25 seeds Very tall grass up to 18 feet tall in one year. Broom corn can grow in any soil types! The tough fibers to which they are attached are used to make excellent brooms! Edible uses. The seeds are edible and can be sprouted, cooked, popped, or ground into flour. Broom corn is not really a corn at all but a type of sorghum which is a grain crop plant. Some of the worlds most important grains come from this group of plants.