You can find it in pretty much any health food
store, or maybe even the natural food section of a regular grocery
store. Look for tea that the only ingredient is red raspberry leaf. Just because it's natural and herbal doesn't mean it's safe, and some teas have ingredients that may not be safe. herbs are like medication, many may not be safe.
The raspberry leaf won't soften your cervix, it tones the uterus which makes the contractions more efficient when you are in labor.