What to plant...

I have a flower bed that I am going to start over with and need ideas on what to put in there.

It gets full shade until about 2:00.
Dappled Shade from 2 until 3.
Full sun from 3 until 4.
Dappled shade from 4 until 4:30.
Full shade from 4:30.

I currently have Iris in this bed and they haven't bloomed.

I don't think that is enough sun for Irises. What look are you going for? Do you want flowering or greenery?

Yes, the iris are coming out.

I don't really have a good idea of what to plant there. I have three hydrangeas that need to be planted. I have a plant called gold dust that I could put in there but it says shade and I'm not sure that having sun on them during the hottest time of the day is a good idea.

I'd like to get more hostas but, again, not sure about the sun on them.

I have a ton of day lilies that need to be planted but I think that would be too much shade.

Assuming you're on the coast side of the coast range of OR, your summers are pretty cool, so even though in most climates I'd recommend against planting shady plants where they get some afternoon sun, I think it would work for you. I think you're going to have trouble with anything that needs sun there, one hour of sun and a little bit of dappled light are not going to be enough for most sun loving plants to bloom. So if I were you I'd try one of the plants you mentioned, I think they all could work there. If the area's right under a tree then the hydrangeas may not be totally happy, I've had trouble with them when they're in the root zone of a tree since they're thirsty plants and the tree takes a lot of the moisture. But then again, you probably get enough rain that it may not matter!

Which hydrangea do you have? Some like more sun than shade. Also, I'm not an expert on hosta but some actually do better with some sun on them so in any case I think hostas would do fine there. You only get one hour of strong sun so I don't think that's too much even for your zone. I looked in the plant files for your Gold Dust (I never heard of it) and think it may burn - seems like a sensitive plant. Definitely too much shade for daylilies. I would just stick with part shade plants. Hopefully someone in your zone will see this and help you out.

Caladiums would work nicely. They don't bloom but they do put out lots of colorful foliage.

Oooooh, I've really been eyeing those caladiums lately. They're selling them more and more around here. They must be becoming much more popular. I wish I could grow them as a perennial here (I'd have to dig them up in fall). They really would add nice color to the garden and the variety of color is lovely. Good suggestion. I love colorful foliage, I'm a Heuchera fan myself. The Heuchera villosa species are supposed to be good for hot and humid areas. See if you can pull up this...davesgarden.com/guides/articles/view/532/ I'd tell ya where to find in on here but I can't remember where I saw it but I bookmarked it! I hope you can view it.

Some lilly of the valleys and/or astilbes should work. And some ferns would like that kind of exposure also.

My favorites for shade are monkshood, foxglove, lenten rose (Hellebore), bleeding heart, trillium, lady slipper, shooting star, columbine, lily of the valley, and of course hostas (my favorite is a miniature alba).

I tried jack-in-the-pulpit one year. Beautiful striking plants, but horribly invasive. Same issue with maiden hair ferns and wild ginger.

You def have to do plants for mostly shade since you only get 1 1/2 hrs of sun.
You can do a custom search like this on some companies websites to give you an idea of waht to plant.
http://www.bluestoneperennials.com/b/bp/adv_search_mod.html
Moist or dry shade makes a diff also.

medinac - I found out the names of two of the three hydrangeas - one is Blushing Bride and the other is Harlequin. The third is a no-name hybrid macrophylia.

I also got two shrub fushias, one called Army Nurse and one called Queen Esther. I have more room in there than I thought I would have. It needs something else.

This area has sprinklers but do you think the Hydrangeas would need their own drip line?

Here's the bed.

I suspect if you're watering enough to keep fuchsias happy the hydrangeas would be happy too.

Your hydrangea should do fine there and I agree with ecrane about the water. If they aren't getting enough, they'll let you know by wilting (also will do this if sun's too hot, just give them more water). I also have a couple more suggestions in plants. I really like Ligularia Britt-Marie Crawford - but she's big. I like Brunnera Jack Frost or Kings Ransom and the Hakone Grasses. I'm a big foliage fan the these plants provide variety and color in shade. You do have quite a bit more room in your bed so you can have some fun! Good luck choosing your plants. You can always post pictures when you're finished so we all can see it!

I love Hakone grass too, one of my favorites! Especially 'Aureola'. It would look really great in the front of the bed as a border.