Since bud break is usually determined by temperature rise and increasing sunlight hours it is hard to "control" but you can do some things to trick those buds into staying tight longer.
1) use a dark colored wax to spray the buds (a light coating only), this reduces the sun reaction portion of bud break, thus slowing the tree down a bit.
2) chill the air around the tree so it remains in the dormant phase longer and at the same time reduce the availability of sun exposure. This is usually the method green houses use, it is impractical else where.
William, I use paraffin wax with a little black shoe polish blended in, once this is melted and homogenous I incorporate vegetable oil (2:1 ratio oil to wax), this allows me to put it in a spray gun for application.
I use this set up for speed and ease but when finished I have to use near boiling water through the gun to clean it out so it will work the next time.
My spray gun for wax is a standard automotive type that I got from harbor freight, the cheapest they have, no need for a high dollar unit.
I try to plant early blooming frost sensitive trees in sheltered north facing slopes to prevent early bud break. Those areas stay cold longer for us and don't start getting direct sun for a month or so longer than our south slopes.