Most of us planting citrus in a container are planing on fruit which will take years. We need a mix that will not breakdown and fail to drain after a year or two. Any of Al's mixes will work well. The gritty mix will be the longest lasting. It will also require the most frequent water and fertilizer attention. Are you willing to take the responsibility? We see a lot of container planted citrus here that are being starved, and generally neglected. Most of us use a 18 to 24 inch clay container which provides a lot of stability. If you use the gritty mix the weight of the mix alone provides much stability. Al