Question
Maybe I didn't phrase the question well.  I don't want to make an arrangement but the actual grave blanket that covers the burial places.  The burial plots are covered by greenery and ribbon, etc. on top of the burial plots.
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Followup To
Question -
I would like to know how to make my own grave blankets.  I have a lot of artificial Christmas greenery and wondered how to put it to the best use.  This plot is for two individuals.  Thank you.
Answer -
Hi Jo.  There isn't too much to making a cemetary arrangement.  Most of the sprays used at Christmas time stand upright and are one-sided, since the back faces the gravestone.  Log baskets are most popular for this.  They can be found at any craft store.  You can tape or wire a couple stakes to the basket to drive into the ground to prevent the arrangement from blowing over in the wind, if you choose.  It's usually not necessary with fresh arrangements, because they're bottom heavy with the wet foam.  But the dry foam used in dry arrangements is about as light as air.

But if you're going to make one arrangement for both plots, you might want to consider going with something long and low, more like a centerpiece.  I'd purchase a wide, low dish if you're going to go with this idea.

Whichever way you go, you should use a brick of dry floral foam.  My personal preference is Sahara.  I find it to be the sturdiest of brands.  I would use a full brick for an arrangement this size.  Be sure to fasten the brick into the container well.  Since this is a dry arrangement, I recommend to glue the foam onto the bottom of the container.  Hot glue works fine.  You can use tape across the top of the brick, but the hold is going to loosen with time.  So if you're intending to keep the arrangement long-term, I wouldn't use tape.

You'll probably want to cover the brick of foam with some type of moss to blend it in with the greenery.  Sheet moss is my favorite, but you can also use Spanish moss with artificial arrangements.

How you arrange the greenery is completely up to you.  Just try to make sure all stems are inserted at least a few inches into the foam.  Otherwise, the wind may loosen the stems and cause the arrangement to fall apart.

Answer
Sorry about that!  

Those grave blankets are usually made with a foam form.  You can find them in shapes - hearts, wreaths, crosses, or plain rectangular sheets, at many large craft stores.  If you can't find one, a florist should be able to get one for you.  They are similar to styrofoam but are a little more brittle to allow for easier insertion of the greenery and a sturdier fit.

To cover your form, I recommend to use sheet moss.  Loosen it up a little by pulling it a bit thin.  Then attach sheets using greening pins.  Those are pins shaped sort of like staples, with a twisted top.  You can get those at craft stores, too.  Try not to use too many pins, or you may run into problems working the greenery stems in.

Then you'll start by inserting your greenery around the edges, first.  You can insert branches straight into the foam, or put them in at an angle so that the greens lay close to the form.  Work in layers toward the center, covering the stems of the one layer with the greenery of the next.  The bow goes on last and is fastened with a wooden pick.