In my case I have pots of Venus flytraps crowded with Drosera burmannii, basically growing like weeds all around the Venus flytraps. I have my little 3 year old nephew to thank for that, last year in early November, he found the vial filled with seeds D. burmannii I've collected. Unbeknownst to me, he thought he would help me plant them by emptying the whole thing into my pots of VFT growing in the pots for 3 years now. I didn't understand him when he tried to explain what he did with the vial of seeds, i thought he spilled the seed on the lawn, couple of weeks later, I saw the burmannii plantlets growing, reaching flowring size by early January of this year. Right now my VFT are doing just fine despite their crowded condition. I think the issue is their roots, unlike normal plants, the roots of the VFT & Droseras are just to anchor the plant to the soil, it only draws water & that's it. No mineral or other nutrients is drawn from their roots so it doesn't affect them that much when crowded. One surprise is that my D. burmannii survived the cold winter easily. As long as they are protected from the frost, they did okay, sprouting and growing to flowering size despite the cold. I'm going to have them growing outside next winter how much they tolerate the cold. That it wasn't some fluke. This post was edited by hunterkiller03 on Sun, Apr 6, 14 at 14:32

Well, indeterminate, hopefully not a ginormous type. You're right, I need to think more about diameter rather than volume. I got a yardstick and measured out what the diameter of a 20 gal container would be, and it was way too small. I would need at least a 45 gallon container with a 27 inch diameter, or, as you said, 3 separate smaller containers. I was afraid the smaller containers would dry out faster than I could keep them watered. Thanks!

Since they're all Jade plants they'll probably be OK in the same pot. Sounds like that would be very pretty.

If it is 2 plants very close together, it may be hard to tell just by looking at what is above the surface. A heart-leaf Philo leaf does not have a geniculum on the petiole. Anthurium leaf would have that, which allows the leaf to swivel easily. Heart-leaf Philo petiole is round in cross-section, Anthurium is caniculate. H-l P is a vine, Anth. leaves all arise from a central point. This link has good pics of Anth. anatomy, though not the same species that is usually used for a group pot. http://www.exoticrainforest.com/Anthurium%20cubense%20pc.html You should be able to decide by finding or not finding these features. Generally, Anth. leaves would be significantly larger than h-l P leaves.