Welcome to the Tropical Forum! We're glad you're here!
I see you've already asked your question on other sites, so I'll just offer an opinion and a question. I would think that equal parts of good mix would be soil, sand, and peat. My question is would you be putting mulch into the pots, or on top of the potting mix? I would think either cypress or cedar pieces would be too large for a potting mix. If you need something that will take in water, then drain well, maybe use a potting mix geared for cactus.
Someone else may come along with a better idea, so check back later. We'd like to see your potted citrus too. Post a few photos if you can.
