Split the pitted Medjool dates down the middle to make room for the whipped tahini, and arrange on a plate or serving board.
In a small bowl, mix the tahini, cardamom, and sea salt with a small fork. Slowly add the rosewater in, a teaspoon at a time, mixing thoroughly between each addition. The tahini will begin to thicken as you incorporate the rosewater. Continue until you have a thick paste.
Stuff small spoonfuls (1/2-1 teaspoon) of the whipped tahini into each date. Top with flaky sea salt and edible dried rose petals, if desired.
Notes
The strength of rose flavor and scent in rosewater varies product by product, so you may need to adjust the amounts to your personal liking depending on the rosewater you use. Same goes for salt content in the tahini you use. Always taste as you go!