Common green sage is hardier than other varieties, so try growing it before any others if you don’t have an ideal climate. Leaves and flowers of sage plants. The older leaves keep getting covered in a grey mould. Sage is one of my favourite plants. Place the sage in a pot with water and boil. If the leaves are losing some color or turning yellow they need more light. TooManyWeeds87 Seedling. The leaves of a sage plant are elongated and come to a point at the end. I hope it helps. I've been growing it for years and it always does really well. Sun and Soil Requirements How to Grow Sage Zones. The sage leaves grow best in terms of aroma and flavour when in low to medium nutrient soil rather then high nitrogen soils. Like powdery mildew, gray mold is well named. It appears as a gray mold, primarily on old and dying leaves and flowers. Sage thrives in well-drained, slightly acidic soil and full sun or light shade. I have cut back on the watering a lot but the leaves are still turning and some are dead. Sage leaves are curling under. Step 1 Examine the plant to see if the brown spots occur only on certain leaves. It begins as water-soaked spots and eventually develops into the characteristic gray, fuzzy coating. Sage grows well in zones 5-9. They are a dusty gray green color. 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. These spots will then change color from gray to brown, eventually covering most of the leaf and causing it to wilt. These might appear white at first. Remove diseased flowers and/or leaves right away. Like rosemary (Rosmarinus officinalis), also from the Labiatae family, sage prefers a light fertilizer and for the soil pH to be between 6.0 and 7.0.To measure the soil’s pH, you can buy a pH reader from your local garden store. Sage leaves have a velvety texture that is pretty in the garden and also feels nice when you pick the leaves. Sage grows best in sandy, well draining soils when watered once every two weeks. Sage thrives in fairly rich soil that is well-drained. How to Identify Gray Mold Damage. It grows spikes of spring flowers in different colors, including purple, blue, white, and pink. Brown spots on the leaves of the sage plant can be an indication of several different problems. Sage (Salvia officinalis) is a short-lived perennial herb grown for its aromatic leaves. Does anyone know what that is and how I can stop it from happening? fish_4_all, Mar 12, 2010 #2. Only one annoying problem. 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. Not all sage varieties are culinary; the most popular kitchen sage is called Salvia officinalis. This is an indication of rot or mildew. I planted a Texas sage Silverado (Leucophyllum frutescens( about a month ago and watered it deeply for the first couple of weeks. It will survive mild winters, but can be damaged by hard frosts. I started to notice the leaves were turning yellow and wondered if I watered it too much. The oval leaves turn vaguely purple in full sun, and the compact growth habit makes it perfect for containers or small areas. It forms a shrub up to 2 feet high with gray-green leaves and attractive lilac flowers. Apart from being unsightly, it … Sage is a hardy perennial with pretty, grayish green leaves that like as good in a perennial border as they do in a vegetable garden. Troubleshooting the plant to determine the problem is the first step in solving it. 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