It probably will not hurt you to drink pomegranate juice or beetroot juice in an effort to lower blood pressure - but honestly, the evidence to support such a causal role is slender to non-existent.
Pomegranate Juice and Lower Blood Pressure - just one study that I can find, consisting of just 10 individuals.And those participants drank half a liter of pomegranate juice a day.
Beetroot juice and Lower Blood Pressure - just one accessible study that I can find - consisting of just 15 individuals.
So, I would just caution against too high an expectation of the benefits of such claims.
Stick to the fundamentals, if you want to substantively lower blood pressure. Cut out as much salt as you possibly can - that includes cutting out salty snacks, and it means checking how much salt your food has - people are often surprised at how salty cheese is, of example.
Cut out smoking, if you are a smoker.
Consider your alcohol intake, and whether you need to cut down a bit.
And body mass and weight can be really important. If you are carrying a few too many pounds, then cutting back on calories and increasing exercise can only be a good thing.
Achieving a significant reduction in your blood pressure - significant to warrant not taking medications - is not something that can be done overnight. In all seriousness, it is likely to be a project that will take months - and you then have to control these factors, going forward.
So do not lose heart, but please be aware that this is not a sprint - it is a marathon.