All of the above are good dove attractors, but if you' re not able to plant any earlier than june 20th, none of those plants will produce seed by dove opener. If the land has weeds growing on it, I' d let them grow until about two weeks before season, and then go in and mow them all down as low as you can, weed seeds attract them pretty well to, and if you can get the cover knocked down and the weeds all die, that might be your best bet for this season.