AstringentHerbal Actions / By Karen Coe Astringent herbs causes tightening or contraction of tissues. The astringency of these herbs is important for wound healing. Astringent Herbs Calendula – Calendula officinalis LHorsetail – Equisetum arvenseSt. John’s-Wort – Hypericum perforatum Share this:TwitterFacebookPinterestLinkedInPrint Like this:Like Loading...