Plates for planting sunflowers

[PineGroveCat]

I am getting ready to plant my sunflower field for this fall's dove season. Everything is ready except that I need the proper plates for my John Deere 2 row planter. I've been told that the proper plates are essential for a good crop (just like with anything planted). I just don't know what the proper plates are for Peredovik Flowers or where to buy them. Anyone have any suggestions/advice>