Not only can you save money and cleanup time with a tray, adding a seed tray to a tubular feeder may attract different birds. Some birds, such as cardinals, prefer a flat surface to feed from. 
A bird seed tray provides birds a place to perch and also catches seed that would otherwise fall to the ground.
The droll yankees tray pictured to the right is a cinch to attach using the threaded plug that comes with it and removal for cleaning is just as easy.
It can also be attached using the Pole Adapter so that you can pole mount your tubular bird feeder with the tray attached. The ADPT is included with the Garden Pole and Ultimate Yard System or can be purchased separately.
Attach the seed tray with a Suet Link and hang a suet cage or another feeder beneath.
The A-6 Seed Tray fits the Droll Yankees “A” Series Classics, the “TH” Series Classics, and the “CJ” Series New Generation, as well as some other brands.
Made of UV Stabilized Polycarbonate, it will provide years of perching for your birds.