Muck (I mean compost or humus) is NOT in most Fafard mixes. I've used Fafard products for many years and have never seen a potting medium with compost or humus. I'd suggest that you consider one of the Fafard commercial products listed in the attached link (below). Click on the Medium weight medium and take a look at 3-B, the product I've used for 20 years. In my opinion, it is far superior to Pro-Mix. Then, click on the Heavy weights to look at 3-S, the mix and I am going to be trying out next year. I have a feeling that I might be making a switch. I looked at the packaging of their typical retail products and wouldn't use any of them for containers. Does the mix you're talking about include fertilizers, too? Unfortunately, any of those retail products look like trouble to me. http://www.fafard.com/cList2.aspx?cID=Canadian%20Soil (Potting mixes for the Retail Trade.) I've been recommending Fafard products for many years, but have learned to specify 'Commercial or Professional' mixes, and not that retail stuff. Develop a good relationship with your favorite locally owned garden center or nursery and they will probably get some in for you. Worm castings don't have much of a place in a good container medium, which should be 'built' with a coarse structure in mind. They might be okay in a seasonal planting, but I really don't see the benefit. Here is a link that might be useful: Fafard

Looks like the acidifier in Fafard is pine, and the acidifier in pro-mix is lime - I am unsure how the ingredients measure in either. For me, Fafard does not dry out like Pro-Mix can. Possibly different wetting agents? I don't know. I can find out more on Tuesday probably, I'm meeting with our soil supplier then. FL

Yeah I decided it was better not to take the risk and used 2:1 perlite and the fafard mix. I did pot up 2 little Sedeveria offsets, one in straight fafard mix and one in the 2:1 out of curiosity.

Cynj, Farfard actually does have a cactus and succelnt mix. Look online, they do sell it, just in case you are interested. For my citrus, I use Miracle Grow Citrus and Cactus mix. It's growing just fine. I use Farfard Professional Potting mix for all my other plants, my plummies go in Cactus mix. If your local nursery doesn't have it, (most regular nurseries do have it), you can ask them to order some for you. I tried Al's mix one year, it was fine, but I had to water almost every day. I'm not watering every single day, all my plants. I'm not saying it isn't good, everyone has a different tolerence for things. I also use Foilage Pro, by Dyna Grow, I dilute it 1 teasp. per gallon of water, and every time I water, they get a little Foliage Pro too. Foilage Pro is awesome! A little bit goes a long way too, so even tho it is a little pricey, you don't use that much. I use it on all my plants, even orchids love it! Hope I helped a little bit.