What's wrong with my plant? Garden University of Minnesota Extension
What's wrong with my plant? Garden University of Minnesota Extension . Petunias (petunia spp.), frequently cultivated as annuals although they survive as perennials in u.s. To much water or not enough? Common St. John’s Wort (Hypericum perforatum) Seashore to Forest Floor from www.seashoretoforestfloor.com John’s wort in sunny areas in northern areas, though southern plants enjoy a little shade. The tiny black dots are septoria leaf spot spores. Leaves turn yellow, then brown, and wither up.