Foerster, Warning and EncouragementKarl Foerster was one of the most important perennial herb gardeners and breeders of the early twentieth century, as well as being a successful author. But it was as a gardener and poet that he made his greatest impact - his wise sayings, images and visions enrich the gardening world right up to the present day.Warning and Encouragement is suitable for reading on a quiet Sunday afternoon on a garden seat beneath a cherry tree - an invitation to quiet contemplation and a smile.