Half peat half sand is best. Moisten the mix before you put it in or the peat will be hard to get wet. Overfill because it will settle. 3 feet deep is nice, you can probably put 6 inches of packing peanuts at the bottom if you wanted (that will avoid peat rotting at the bottom.. Drainage holes around 6 inches down is what I have (as well as an overflow).

Full sun z6 is great for pitcherplants, sundews, flytraps.