Update: the anthurium is doing great. I potted it in a nice terra cotta pot that was slightly larger than its nursery pot, with some good soil. It lives on our kitchen counter top, directly in front of a window, where it gets morning sun. I water it each day or two. I see no leave discoloration and there appears to be plenty of new growth (leaves) springing up, so I guess I'm doing ok with this one.
As for the cuphea, I THINK it is ok. It did have a few branches and twigs that curled up and withered, but I trimmed them off. Now, the plant have nice looking leaves throughout with some flowers still in bloom. A few recent heavy rains and some high winds appear to have knocked off many of the blooms, though there is evidence of new growth.
I do regret adding the sand with this one, but I don't think I'll start over and risk "shocking" the plant again. At this point, I just ensure the drain holes are, in fact, draining periodically, by poking a rod up inside to ensure they aren't blocked. **I'd like to know if there is any kind of fertilizer or organic material I can add to the soil that will encourage more blooming.** This is my primary natural hummingbird food source this summer (along with numerous artificial feeding stations), and I want to keep it as appealing to the birds as possible.
BTW, this plant sits in my front yard, where it receives direct morning sun for a few hours, then partial shade/dappled sunlight throughout the afternoon. I'd like to move it so it gets more sun, but I want to keep it close to my bird feeders so it will get more attention. Plus, the planter now weighs about 80lbs and isn't ideal to move around...
Banana peel visible in one of the photos is there to encourage fruit flies, which the hummingbirds also eat.