Thanks again. Nettle leaf seems to be a panacea. It is part of my daily regimen. It hasn't helped my sinuses though -yet. I haven't found any of the natural antihistamines to work for me. I will continue to use nettle; especially if it can help through the cedar season.
If you can find the watercress you will find that it is a lot stronger.
I also find peach leaves to be an extremely effective antihistamine, but health food stores rarely sell it. So you would have to collect, dry and grind your own.