Just finished digging a 10′ diameter flower garden (Dianthus varities) in our front yard. Uncertain what the
next step should be. Yep, this is a first for me. The soil appears to be in really good shape and removed all weeds and roots. Should I cover the bed with plastic and cut holes then plant the flowers? If so, after the flowers are planted, should I put something (bark perhaps?) on top of the plastic? Will the plastic provide too much moisture and destroy the roots of this particular flower? Do I need to mix potting soil with the dirt in my bed? Again, this is my first flower bed and I need instruction. Do you know anything about this particualr kind of flower? Your responses will be deeply appreciated.
P.S. I dont want to spend a fortune on upkeep. I live in central Kentucky. Thank you.

I live in Kentucky, too. This is what I have done to every one of my flower beds. Keep in mind that the dianthus will come back ever year if taken care.
1. level your ground.
2. Miracle Grow. Slow release or steady release formula, (not exactly sure what the name is).
3.Measure yard fabric and cut it a little bigger than the actual size you need.
4.Lay the plastic down on the level flower bed, (do not use the fabric pegs and this point to secure the yard fabric) place the flowers where you want them leaving enough room for the flowers to grow.
5.After you have the flowers laid out the way that you want then. I cut the holes shaped in an X pattern onto the yard fabric and pull the fabric up dig a hole large enough for the flower and put the miracle grow and the flower into the hole through the yard fabric this way you don’t have to wiggle the fabric over the flower blooms.
6. When you are finished planting all of the flowers, secure the yard fabric into the ground with the fabric pegs.
7. Generously water the flowers
8. Place mulch over the yard fabric and water the first couple of weeks every day.
I hope that this help and the mulch will help keep the moisture in the ground during our hot summers. Enjoy.