A...you are smart to get the right mix to avoid trouble. The best thing for you to do is: Use a 50/50 mix of potting mix and "cactus" potting mix. This will provide better drainage and not be too expensive. Never use the moisture control MiracleGro. It holds too much water, and it makes a mucky mess on the bottom of the pot.

I don't know if your Home Dopey has the same planting mixes as the ones in SoCal but,

Mine has a cactus/succulent mix that is pretty reasonable for potted citrus. I can't remember the brand but was thinking it was Kellogs. It has pumice, fir bark, sand, and not too much peat moss. I certainly would not mix any regular potting mix with it as then you would go from "too much" peat moss to "way, way too much" peat moss.

It is not as good as the EB Stone Citrus Cactus mix that is readily available around here but is way better than you would expect to find at a Home Dopey.

A wick does help the perched water table a lot.

Thanks for the suggestions. I'm definitely staying away from the MG - between the water retention and the pests that can fall in love with its fertilizer it just isn't worth it!

I'll see if I can find some good cactus mix. Oddly, my home dopey (love that!) has perlite, so I might try to mix some of that in too??? Sigh. I have a feeling this will be a "try this" and then "try again" experience!