Both rose and jasmine are commonly used for love spells. But they have other uses.
Magically speaking rose can used to enhance psychic powers, luck and protection. It also helps you with divination. Rose is used for healing and healing spells as well. Medicinally the flower, petals, root and bark of this flower are used. Rose contains vitamins A, B, E, and K, potassium and iron. Rose can be used as a menstrual regulator. It is also an anti-depressant, aphrodisiac, antiseptic/antibacterial, digestive stimulant, cleanser, blood cleanser and anti-inflammatory.
Apart from love spells, Jasmine is also used to attract money and enhance prophetic dreams. Just like Rose, Jasmine can be used for healing and healing spells. Medicinally only the flower of this plant is used. Jasmine works wonderfully as a sedative to help you combat stress and as an aphrodisiac. It is also a pain reliever, especially abdominal pain caused by cirrhosis, liver dysfunctions, diarrhoea and dysentery. Jasmine is also used in cancer treatments. It increases immunity to help you fight fevers and is also known to heal conjunctivitis and urinary tract infections. In China, jasmine tincture is used to treat cuts and scrapes. If you have a headache or a sun stroke, relieve it with a cold compress and some jasmine oil. Jasmine lotions or juices are effective for treating skin ailments like corns and rashes.
Now that you have information on these flowers, as sue suggested, try creating your own spell based on their properties. Simply, because your own spell will be far more powerful.