Happy Spring!
If you’ve got some time on your hands and a hankering for some faux flowers in the house, have I got a craft for you! Now you, too, can be the owner of a floral ring centerpiece.
How? you ask. Well sonny, I certainly don’t mind telling you.
1. Gather supplies: You’re going to need a hot glue gun (not pictured), a foam ring, scissors, ribbon*, and silk flowers in different sizes. The ribbon is optional, but I liked it. I bought the floral ring, orange flowers, and ribbon at Dollar General for….$1 each. (The yellow flowers were a gift.)
Get more flowers than you think you’ll need, in complimentary colors and different sizes. I can’t tell you how many to buy, because that will depend a lot on what kind of flowers you pick and how big a ring you make. Buy a stem or two extra.
Here I’ve plucked all the flowers from their stems, leaving just the little nubbins at the base. You may need to cut them off with scissors or wire cutters, but try just yanking them off; mine came off easily.
1A. Hot glue ribbon– If you decide to add ribbon to your floral ring, you’re going to need to apply hot glue in a line along the bottom edge of the ring. Then just gently spool out your ribbon all along the bottom.
The ribbon may not show on the final product, but I like it as a “finishing” piece just in case someone does peek at the lower portion. 
This is what it looks like. ^^
1B. Glue Leaves on Inside– Another optional step that just adds to the finished look. I glued the leaves from my sunflowers to the interior of the ring, just so there is something covering the foam. Not a necessary step, and you could wait until the ring is otherwise complete to see if you want this.
Just add a short line of hot glue and stick on a leaf until the inner ring is more or less covered. It doesn’t need to be perfect. Remember, this will most likely not be seen.
2. Start adding flowers. Take your flowers and stick the nubbins into your foam. Press gently but firmly and they should slide right in without much resistance.
This lets you get a sense for how it will look in the overall ring. At this point, you can either place all the flowers until you’re happy with them, or you can do them one by one. I do them one by one for this tutorial.
You can place them at a slight angle, or straight down into the foam. I recommend having a little bit of diversity: nature isn’t precise, so having them perfectly uniform will actually look a bit more unusual than having them a bit oddball in placement.
3. Glue Flowers. Now that you’ve decided how you would like to arrange your flowers, gently pull them out of the ring (one or a few at a time) and apply a dot (or swirl) of hot glue to the nubbin. It doesn’t take much. Then, push the flower back into the hole you removed it from.
The hot glue will hold the flower in place better than the foam alone. You can skip this step if you’re confident your flower ring won’t be moved around much and you only want it temporarily.
4. Fill in the Gaps. Fill in your flowers all along the foam, making sure to mix up the color and type of flower. This is more art than science; go with what feels good! You mostly just need to cover the floral foam, so if that means squishing the petals a little, that should work. Don’t feel obligated to make it too cramped. This is also why you are placing the flower before you glue it; you can switch them out if you don’t like the placement.
I did the top first, then went around the side of the ring. My flowers were large enough that I only needed one flower to fill the side; your results may vary. Do whatever works best for your project.
5. Enjoy! Your floral ring is a good centerpiece all by itself, or you could add a candle or tall vase to complete the look. (Note: if using candles, be careful to keep the flowers well away from flame! I recommend using a glass vase rather than an exposed wick.)
M.E. Kinkade 
Lovely!