The only problem with tree peonies in full sun is that the flowers will crisp off in a few days in spring. The rest of the year they will love it, at least once they establish some good roots.

Droopy and sulking is normal for a transplanted tree peony. Opening an umbrella is a fine idea! Watering every morning is not a fine idea. Looking back at your previous post, I see you didn't get confirmation to plant them "submerged" but I hope you did anyway. If you did then the roots are mostly down a foot or so in the soil. To give them any water needs a long slow soaking and should only be done once a week or less. You can do this with a soaker hose overnight, or something similar. You might want to dig a test hold after you have watered the area (or even before!) and see if the soil is wet or dry down at the depth of the bottom of the rootball.

You will have to baby them through the first summer. By next year, they should have a much better root system and be able to cope on their own. Established tree peonies are extremely drought tolerant.

Thank you Shrub n Bulbs so much for your advice. I feel much better after hearing from you. I will proceed with the umbrella that are for sale at the Cricket Hill Nursery catalog (it's going to look kind of goofy, but I dont care). I will also only water them deeply once a week. It's good to know that the real issue is only the longevity of the flowers...of which I can prolong by using my umbrellas again if and when they actually begin to bloom. I have my fingers crossed. These are my first plants of any significance and I am terrified of killing them. Thanks for your reassurance. Shiao

Hi, Shiao,
I picked up 10 of the umbrellas from Cricket Hill, They are great. They don't look a bit dumb in the garden and they really prolong the life of the tree peony bloom. I also use them for irises and regular peonies. I have had more positive comments and no negative(unless they aren't telling me) The umbrellas are sturdy and very pretty... You will be happy and so will your peonies. I have used it on my Oriental lilies as well to shield them from the rain(the pollen bleeds so bad when it gets wet. They are far better than what I used to use: old umbrellas ducktaped to a stake.
Good luck,
Mary