Here is a list of foods and feeders that they like.
1. Tube feeder with variety of seeds.
2. Platform feeder filled with bird seed.
3. Tube feeder with black oil sunflower seeds
4. Platform feeder with seeds and nuts.
Cardinals are year round birds so you will see them in winter.
5. Striped sunflower seeds.
6. Sunflower seeds out of the shell.
7. Cracked corn
8. crushed peanuts
Here is a feeder that attracted a flock of cardinals.
9. Safflower seeds, they love em
Platform type feeders are preferred because the need more room.
A tube feeder with platform will work.