Edible flowers have always intrigued me — I love floral flavors, far more than floral scents. Lavender Italian soda, candied violets, briny capers… Give me all of the flowers. I was eating my favorite breakfast the other day (toasted sesame bagel, veggie cream cheese, sliced tomato, thinly sliced red onion, and capers) when one of the little pickled buds dropped out and rolled onto my plate. It was surprisingly pretty, a deep olive green at the tip, turning to a deeper violet near the base, and it got me thinking.
What are capers good for?
(Besides being delicious.)

I didn’t find many traditional magical uses for these guys in my search, but I did find some very interesting medical uses and folklore than seems to provide the basis for their modern magical properties.
Capers Magical Properties and Folklore
Going down to bone town.
No, really. They’re mostly used as aphrodisiacs.
Even the Christian Bible acknowledges this — in Ecclesiastes, translations dispute whether a certain passage should read as “desire” or “caperberry.” In Hebrew, the word for caperberry, aviyyonah, is linked to the word avah, meaning “desire.” The King James version of Ecclesiastes 12:5 reads, “the grasshopper shall be a burden, and desire shall fail.” Meanwhile, older translations render the word “desire” as “caperberry.” As a result, some modern translations go for “desire,” while others use “caperberry.” Confusing, huh?
In ancient Greek medicine, capers were used to relieve gas and bloating. This isn’t really tied to any aphrodisiac effect, but it’s probably easier to want to do the do when you aren’t farting like a Clydesdale.
The Witch’s Cottage Garden lists capers as a Mars plant. This is most likely due to the plant’s thorns — plants associated with Mars tend to be prickly — but also fits its use as an aphrodisiac. While Venus plants are associated with love and beauty, Mars energy can be passionate and lustful, in addition to assertive and warlike.
Other sources list as useful in magic for lust and potency, which also suits it’s Mars energy and desire-promoting qualities.
Using Capers
Eat them, but not too much. Capers are preserved, so they’re very high in sodium. (Ironically, if you have sodium-sensitive blood pressure and blood pressure-related sexual dysfunction, they can make it harder to get in the mood.)
I like including them in salads or, as I mentioned before, on a bagel with cream cheese. If you don’t eat cheese, a nondairy alternative or some avocado would work — I find that the salty, lemony bite of capers benefits greatly from something cool and creamy to offset it.

If you want to use capers in your magic without eating them, the mature flowers are very pretty and unusual-looking. While I haven’t seen the flowers for sale (I think most people prefer to pick them when they’re just buds, for culinary purposes), you can find the whole plant for sale and grow them fairly easily if you’ve got a dry climate and plenty of sun.
As a note of caution, the caper spurge (Euphorbia lathyris) is a poisonous plant that is often confused for capers. Eating the buds can cause mouth pain, nausea, cardiac arrhythmia, fainting, and delirium. So, if you going to go try to find capers, maybe stick to garden centers and grocery stores unless you’re really, really good at IDing plants.