I do it 2 ways- I have the bottom of one of those 'seedling trays' you see all over the place in the spring. I've some pygmy drosera & a bunch of baby sarracenia in there, all in 4" tall pots. (those standard 4" tall, 4" square plastic 'nursery pots') I'll put about 1/2" of (rain not sink) water in there & refill it when the level drops to the point where the bottom of the tray is moist. Then I've a hanging pot- It's one of those ones from Rite Aid with the "thingy" (girlfriend's word) in the bottom so there's a water reservoir there under the media. About 1/2 inch up from the thingy I drilled a few 1/8" holes 'round the perimeter of the pot. Filled it with media & at first I had a little 1/2" piece of PVC pipe I could pour water through down to the reservoir. That got plugged somehow so I took it out. Anyway, I wait until the peat is still moist but starts to pull away from the side of the pot a little- 1/8" or so. Then I gently pour in the water letting it flood across the peat. The bottom fills, excess runs out the holes & it's good for another week in the summer, perhaps a month in the winter. The hanger has pygmies & flytraps & a nepenthes- I just scattered a bunch of byblis seeds in there. Outside I've a pedestal pot- Picture the hanging one sitting on a post. Pretty much the same deal except without the thingy in the bottom. Holes are about 5" down from the top leaving about 2" in the bottom for the water. That's where my adult sarracenia & a few flytraps live.. Plus a little voodoo lily- I've no idea how that got in there nor how it hasn't rotted away yet. So that's how I do it. The plants get to "reach down" to the water without being waterlogged. Seems to work.

Azaleas like acidic soil & would probably benefit with filtered light or morning light, but not necessarily. Mine gets decent light before the trees leaf out, but after that it's in mostly shade & does wonderfully. I do add acidic fertilizer every 3 months to help & water well.

The spot is now filled, but my reading is that Erigeron karvinskianus is suppossedly hardy to z5 or 6 (not 15F), but I've never tried to grow it myself. In general things that thrive in CA hate it here, can't grow a thing that likes San Francisco climates (just noting the apparent fact). Also saw recommendation that it prefers cool summers (we don't have that), a comment that it doesn't seem to like summer humidity (we have that), or cold damp winters (we have that), if happy can spread invasively (don't want that). Lol, sounds very iffy and if it really did do well, a nightmare in the making. I appreciate your suggestion, but I think I'll steer clear. No, I have a western wallflower (my own idea...kinda doubtful), blackfoot daisy, and texas craig lily in the hole now. And a purple poppy mallow waiting in the wings in case the something gives up a space.

I think this convo spurred me to try again, and I got an Adiantum aleuticum 'Imbricatum', and it apparently likes where I planted it (outside..not a house plant), and still has nearly perfect fronds (mild winter), we shall see. They are lovely...though the challenge for me may be the wetness of early to mid spring for it. The planting location is on the north side of the house, and it gets shaded by a growth of mimulus alatus (winged monkey flower) and it came through summer fantastically. I hope to see spore spread in a year or two, shield fern, lady fern, and painted ferns have performed well for me here and spread along the house foundation area.