These spots will then change color from gray to brown, eventually covering most of the leaf and causing it to wilt. How to Grow Sage Zones. It will survive mild winters, but can be damaged by hard frosts. Sage grows well in zones 5-9. Like powdery mildew, gray mold is well named. Sage thrives in well-drained, slightly acidic soil and full sun or light shade. It appears as a gray mold, primarily on old and dying leaves and flowers. I've been growing it for years and it always does really well. Sage leaves have a velvety texture that is pretty in the garden and also feels nice when you pick the leaves. Common green sage is hardier than other varieties, so try growing it before any others if you don’t have an ideal climate. I hope it helps. Spots typically start on lower leaves but can spread to cover the entire plant Severely infected leaves may be completely covered in white or grayish white fungi In some cases, leaves become curled or twisted or turn yellow due to the infection I started to notice the leaves were turning yellow and wondered if I watered it too much. All of this is from information I found online and not my experience. Not all sage varieties are culinary; the most popular kitchen sage is called Salvia officinalis. Brown spots on the leaves of the sage plant can be an indication of several different problems. This is an indication of rot or mildew. It begins as water-soaked spots and eventually develops into the characteristic gray, fuzzy coating. It grows spikes of spring flowers in different colors, including purple, blue, white, and pink. Does anyone know what that is and how I can stop it from happening? Sage is one of my favourite plants. How to Identify Gray Mold Damage. Troubleshooting the plant to determine the problem is the first step in solving it. Remove diseased flowers and/or leaves right away. The symptoms of gray mold depend on the type of plant and environmental conditions, but generally spots that appear water-soaked will form on the leaves. Apart from being unsightly, it … They are a dusty gray green color. Place the sage in a pot with water and boil. Sun and Soil Requirements The leaves of a sage plant are elongated and come to a point at the end. If the leaves are losing some color or turning yellow they need more light. Sage leaves are curling under. Once it boils, reduce the heat, cover the tea, and let it simmer for three to five minutes. I planted a Texas sage Silverado (Leucophyllum frutescens( about a month ago and watered it deeply for the first couple of weeks. It forms a shrub up to 2 feet high with gray-green leaves and attractive lilac flowers. Leaves and flowers of sage plants. To make your sage tea you only need 3-4 sprigs of fresh sage, or you can substitute fresh with about a tablespoon of dried sage leaves, and two cups of water. TooManyWeeds87 Seedling. Sage leaves can also turn yellow because of too much nitrogen due to fertilizer or a nitrogen deficit because the roots are pot bound. Sage (Salvia officinalis) is a short-lived perennial herb grown for its aromatic leaves. Preventing and Controlling Gray Mold. Step 1 Examine the plant to see if the brown spots occur only on certain leaves. I have cut back on the watering a lot but the leaves are still turning and some are dead. The older leaves keep getting covered in a grey mould. fish_4_all, Mar 12, 2010 #2. Only one annoying problem. Sage grows best in sandy, well draining soils when watered once every two weeks. The oval leaves turn vaguely purple in full sun, and the compact growth habit makes it perfect for containers or small areas. These might appear white at first. 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