Go to a local feed store or TSC . Buy a bag ( 25 kg. ) of feed corn.
Get the biggest pot you have. Fill it 1/2 way with the corn. Add water to about 3 inches above the corn. Bring it up to a boil, turn the heat down to minimun. Leave it for about 1 hr with the lid on. Check it periodically to make sure you don't use up all the water and scorch the corn. Add a little water if neccessary. Turn off the heat and let it sit overnight. Take the boiled corn out with you in your boat. Dump it in a good spot outside the weed bed, maybe upwind or upcurrant from the weeds. Wait about an hr. Fish with your bait beside the feed bed you have created. Have fun. Hope this helps.
Oh ya. If you do this repeatedly you will get even better results.