Can someone advise best natural remedy for high blood pressure?

My mom has essential high blood pressure sometimes reaching over the 200/160 mark. As her blood pressure has been high for a while she has an enlarged right ventricle which will and is leading to CHF. Her breathing is already heavy. Her doctor has given her Betaloc, Plendil, Inhibace, Dosan, Cartia a blood thinner, Lipex for high cholesterol and Quinine for night cramps. She's in her early 70's and she complains of head aches, extreme fatigue and loss of energy. She has increasing dark circles around her eyes as if she hasn't slept in months with shortness of breath like she's gasping for air. I would like her to try natural remedies because these synthetic drugs don't appear to be doing much for her overall health. Can anyone advise some really good and effective natural remedies to treat both high blood pressure and CHF? I know Celery is good for lowering blood pressure.

cheerios and water
no salt and eat garlic
I'm not speaking as an m.d., but I had a friend visit me 2,000 miles from her home and ran out of her blood pressure medicine, I researched and found the herb gotu kola to be recommended for high blood presure, she tried it and she and another friend were able to maintain their health without some of the unpleasant side affects of the meds they were on. they did so well there physician agreed to use that therapy and they never took the prescription meds after that. I would never tell anyone to do this on this one incident, but if you were out, I would try it until I got to the pharmacy.
Adipose tissue loss, water weight loss.

Stress reduction

Regular excercise but not overdone

1-2 days complete rest
I have heard that garlic is a great natural remedy for high blood pressure. It can be bought in health food stores .