I make a garland
I know how to make a garland without using strings. The trick is to do like the drawings below.
You can use any flower (or grass) that has a flexible stem.
If you use small or delicate flowers, take several at a time. Now try it on for size. The ends should overlap a little. Tie them with a strong blade of grass in a couple of places.
If you choose dandelions, as I did, don’t forget that you can get stains on your clothes from the sap of the stem.