The Tea Planter's Wife by Dinah Jefferies

In 1925, new bride Gwen travels from England to Ceylon to join her husband, Laurence, at his family's tea plantation. Life in Ceylon is not like home, with a different climate, customs, and foods. Even though her love for Laurence is strong, Gwen finds herself doubting their marriage, as she feels Laurence is holding back with her. She is also threatened by his friendship with Christina, with whom he was previously involved. The Tea Planter's Wife is a saga of Gwen and Laurence's marriage through periods of strength and weakness in a changing Ceylon.