Well, you're quoting my post! I've since started adding less soil and more peat and very fine orchid bark plus anything that will cause the soil to be porous. Vermiculite is great as is cedar mulch.

Anthurium normally live in trees and don't have roots attached to soil at all although some species do. Keep the roots unbound and all them to seek new areas to grow in every direction. An 8 inch pot will do no harm at all since these tend to be fast growing plants, just make sure the soil remains damp, not soggy.

You may find more useful information in the article linked below.

Good luck with it! I now have almost 100 different species of Anthurium and a very full atrium!

Steve

Here is a link that might be useful: Growing Anthurium

Steve,
So are you saying that you now add 40% MG Moisture Control instead of 50%? Or is it less than that?

What is high quality peat moss? I just bought the Miracle Gro one, because that is what is available here.

Also, no one here carries the Schultz Orchid Mix. The one I am using does not include gravel, but is endorsed by the American Orchid Society. What would be a good substitute for the gravel? I do have some red lava rock that I could break up. Would that be ok to use?

Do you add extra charcoal, besides what is included in the orchid mix?

What does the finely cut spagnum peat moss do?

I have some fir bark in small pieces (Reptibark). Would that be ok to use?

It sounds like you know what you are doing with the anthuriums. Sorry for all the questions, but I would hate to kill this plant. It's kinda special because my daughter's boyfriend bought it for me before they took off to college.

I research every plant before I pot them and find out where and how they grow in nature. I then do my best to mix the soil according to the needs of the plant. Some I use 40% soil, some 30% and a few such as Amorphophallus almost no soil at all. If your Anthurium is a terrestrial species I would recommend no more than 40% soil and add extra bark and charcoal. If it is purely an epiphytic species I would use less soil and more bark as well as charcoal.

If the soil remains constantly damp and wet you need less soil and more peat and other additives that will make it drain even more quickly.

Sphagnum moss finely chopped up makes the soil mix resemble the rain forest floor even better. It soaks up water and holds it but slowly gives it back as needed.

Sorry for the delay, we've been at the Aroid Show in Miami for almost a week now.

Steve