It might work for you, but it could be closer to August before you see bloom. Aprox 2 weeks to germinate, roughly 12 weeks to bloom from germinatiom on average.

I did my red maple in earlier in spring, trying to raise it. Mine was planted about 10-12" too deep, but I planted it myself, with the help of a hired hand in fall of 2015. BTW, I'm in Marlboro NJ, zone 7A. The tree in question was a beautiful October Glory maple. I was just aiming to get the top of the burlap bag an inch or 2 above the surrounding soil, not realizing until next spring, that I had made a mistake. It started out a beautiful 'rubrum' in spring, giving me hours of pleasure, as I just stood around it, sometimes nursing a drink. But as a very wet spring progressed, and the leaves were still not opening out fully, my mind raced to a number of things that could have gone wrong in the planting. I definitely had not cut the cage around it as thoroughly as I should have (damn thick guage wire, so hard to cut with pliers!). So, one very wet day, in a very very wet week, I started investigating, prying the dirt away, in an effort to find the wire cage. In the process I discovered that I could not see the root flare at all, instead the trunk was buried, and was discoloring and fraying from the surrounding soil and water. So I decided to raise it. I leaned on the tree, this way and that until it was moving on it's root ball. I shoveled dirt under the root ball, trying to work it in with my foot. Then I had a brainwave! I soaked the root ball and surrounding with water and waited. As the water drained down, the dirt mixed in the water found it's way to the bottom, while I was still wiggling it. It worked, the tree was slowly raised. And then I made the fatal mistake! I also saw roots that were growing from down on up. Now, with the tree raised, these roots were poking into the air. I started cutting them, some of them were big and juicy. I felt horrible, but could not stop! After I had raised and root pruned the tree to my aesthetic satisfaction, I covered it with dirt just so, and mulched and staked it. It looked really nice, with the frayed trunk, previously suffering the indignity of being buried, now finally breathing and recovering, or so I thought. I kept the tree well watered, even spritzing it a few times a day (deputizing my kids in the job as well). But the leaves started drooping. I increased the watering and spritzing, but to no avail. One by one, the leaves gradually turned brown, and then dropped. After a few weeks, in a frantic effort to save the tree, I cut back the branches a couple of inches from the terminal buds to encourage growth. But to no avail. Right now, it's late August, and a scratch test reveals a dead tree. No cambium, no phloem, no nothing! There are leaves growing from the base, but even those are drying up right now. So, I will definitely be replacing the tree. I have a question from this learned group, but I will first let this greek tragedy soak in first.

I found this on Piviones Riviere's website. WHAT IS THE BEST PERIOD TO PLANT ? How do you plant a peony? To obtain the best results in peony cultivation, pay very special attention to the planting process. *Planting bare roots should be done between September and mid-March. *It is better to plant peonies in the autumn so that the root system can grow before the leaves come out. *Planting can be done during the winter period even with frost during the night as long as it disappears during the daytime. *After March, due to the growing of leaves and vegetation, it is not recommended to plant bare root peonies. *If you want to plant later, we offer cultivated plants in containers that you can buy either from our nursery or at the flower shows we go to. *Tip : In case of frost when you receive our plants, place the parcel in a cool area  a cellar or a garage - and open the parcel. The individually packed plants can remain for a month in their packaging without any harm.

Small salvia plants will need protection. I would set out plants, and be prepared to cover them for nights with freezes.