Bring the ingredients to a slight boil, then allow to cool. Strain and bottle. It will keep fresh and scented for several days at room temperature, longer if refrigerated and if you used red rose petals, will have a pink color. Squash blossoms taste great fresh, they're also good sauteed. The flavor of these yellow-orange flowers is something like that of fresh squash, and they have a velvety, slightly crunchy texture.
Violas are very common garden plants and are usually very easy to grow.
All members of this genus have edible leaves and flower buds though it is probably best to avoid the yellow flowered species as these can be strongly laxative if eaten in quantity. Eaten raw or cooked, the leaves are often used to thicken soups.