The iris in the container can be planted out any time. Tip out the plants, soil and all, and plant the entire thing with the top of the soil in the container at ground level. If they need dividing, you can do it now, but you'll probably lose blooms for this year. You'll do well to amend the soil you're planting your iris in with a bag of composted manure. Iris are heavy feeders and will give extra performance for the addition.

You have nothing to lose to plant your tulips in a pot. You MIGHT get some blooms this year. Once that's over, dig out the bulbs and throw them away. The few and puny bulbs you'll get next year won't be worth the trouble. Next year, buy your tulips bulbs in early fall and get them planted. I have to chill mine in the fridge for 8 weeks or so, but I think I remember another post that said this is unnecessary in the Pacific Northwest. Lucky you! (But you do have to put them in the ground :)