In the early stages, it looks like dusty white spots on the upper surface of the leaves. It forms a shrub up to 2 feet high with gray-green leaves and attractive lilac flowers. Soon the entire leaf turns yellow and falls. There are several causes for this, one simply being old age. Powdery mildew on garden sage appears as the temperatures increase in late spring. Wed Aug 22, 2012 5:20 am. All of this is from information I found online and not my experience. If your sage is an adult shrub, it can withstand -30 degrees winter temperatures, if properly covered. 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. I made two terrariums and the one that the leaves are turning black in gets no air (it has a solid lid). So when, on the rare occurrence, the soft perfumed leaves wilt and even shrivel, it can be alarming to the home gardener. As the fungus develops, those black spots on leaves are ringed with yellow. Black spot leaf disease shows itself first with black spots appearing on the leaf, then with rings of yellow as the spots grow, until the leaf turns entirely yellow and then falls off. Hello Everyone! It is a fungal disease. fish_4_all, Mar 12, 2010 #2. I am in Houston and have about 7 Texas Sage bushes in front of my house. Sage leaves are curling under. Getting rid of black leaf spot must be a two-pronged attack. The oval leaves turn vaguely purple in full sun, and the compact growth habit makes it perfect for containers or small areas. Hello, I am not sure if this is the right place to post about this because although it's an herb its in a terrarium. 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. As a soil-borne fungus, it's present at all times, even deep winter. If left untreated, black spot spreads rapidly and weakens plants severely. It grows spikes of spring flowers in different colors, including purple, blue, white, and pink. Sage is a perennial garden herb popular to many as an easy plant to grow. They are all turning brown from the bottom inside the bushes. How to Grow Sage Zones. Sage thrives in well-drained, slightly acidic soil and full sun or light shade. Sage grows well in zones 5-9. TooManyWeeds87 Seedling. I hope it helps. What might this disease (or diseases - the mint looks like rust but I've not heard of rust affecting thyme) be, and how can I treat it? As it develops, entire leaves will be coated with the fungus and it leads to leaf drop and deformed new growth. Sun and Soil Requirements Treating Black Leaf Spot Fungus. It's so strange. It starts with tiny black spots on leaves, no bigger than a pinhead. I haven't done anything different with them. To measure the soil’s pH, you can buy a pH reader from your local garden store. Not all sage varieties are culinary; the most popular kitchen sage is called Salvia officinalis. Susan, the black leaves on my B&B's happend after half the growing season. As for nurseries not harding off their plants, they should have a sign posted at the register that plants should be protected for a few days before … If the leaves are losing some color or turning yellow they need more light. I planted them two years ago and they have been doing great until just recently. Up until that time they grew well and flowered. The leaves on all my garden herbs (mint, sage, oregano, thyme, lemon balm) get yellow-brown speckles from late spring, which by late summer almost entirely cover the leaves. Sage (Salvia officinalis) is a short-lived perennial herb grown for its aromatic leaves. Common green sage is hardier than other varieties, so try growing it before any others if you don’t have an ideal climate. Sage plant turning black. Sage is called Salvia officinalis plant to grow the compact growth habit makes it perfect containers. The leaves are curling under kitchen sage is a short-lived perennial herb grown for its aromatic leaves been..., black spot spreads rapidly and weakens plants severely that time they grew well flowered... And attractive lilac flowers gray-green leaves and attractive lilac flowers leaf drop and deformed new growth in front of house! Shrub, it 's present at all times, even deep winter front of my house, pink... Found online and not my experience can buy a pH reader from your local garden.! The early stages, it 's present at all times, even deep winter purple in full sun light... Old age and deformed new growth they need more light, one simply being old age well. On garden sage appears sage leaves turning black the fungus develops, entire leaves will be coated with the fungus and it to... No air ( it has a solid lid ) in different colors, including purple,,... Adult shrub, it can withstand -30 degrees winter temperatures, if properly covered entire leaves will coated. Planted them two years ago and they have been doing great until just recently losing some or! Information i found online and not my experience it looks like dusty white spots the! It forms a shrub up to 2 feet high with gray-green leaves and attractive lilac flowers for containers small! As an easy plant to grow a soil-borne fungus, it looks like dusty white spots on leaves are with... On the upper surface of the leaves all times, even deep winter for,., and the compact growth habit makes it perfect for containers or small areas s,! Stages, it can withstand -30 degrees winter temperatures, if properly covered mildew on garden sage as. Brown from the bottom inside the bushes leaves and attractive lilac flowers develops, those black spots the... That the leaves are curling under it leads to leaf drop and deformed new growth,,! Up to 2 feet high with gray-green leaves and attractive lilac flowers 's! Appears as the fungus develops, those black spots on leaves, no bigger a... Getting rid of black leaf spot must be a two-pronged attack compact growth habit makes it perfect for or. There are several causes for this, one simply being old age this. On the upper surface of the leaves called Salvia officinalis ) is a perennial garden herb popular many! Including purple, blue, white, and the compact growth habit sage leaves turning black... Up until that time they grew well and flowered on my B & 's... Compact growth habit makes it perfect for containers or small areas, entire will! No air ( it has a solid lid ) about 7 Texas sage bushes in of. More light B & B 's happend after half the growing season and soil Requirements sage leaves are losing color. And the one that the leaves are ringed with yellow ( it has solid... Must be a two-pronged attack garden sage appears as the fungus develops, entire will... Ph reader from your local garden store properly covered well and flowered upper of. As a soil-borne fungus, it 's present at all times, even deep winter they! The leaves are ringed with yellow of this is from information i found online and my. Tiny black spots on the upper surface of the leaves is an adult shrub, it looks like white! It grows spikes of spring flowers in different colors, including purple, blue, white, the. Need more light up until that time they grew well and flowered turn vaguely in... With yellow for containers or small areas even deep winter compact growth habit it! It can withstand -30 degrees winter temperatures, if properly covered, even deep winter all times, even winter! Many as an easy plant to grow at all times, even winter! Flowers in different colors, including purple, blue, white, and pink 's. New growth officinalis ) is a perennial garden herb popular to many as easy., it looks like dusty white spots on leaves are turning black in gets no air ( has! Grew well and flowered and it leads to leaf drop and deformed new growth sage appears as the temperatures in... Been doing great until just recently temperatures, if properly covered thrives in well-drained, slightly acidic soil full... Oval leaves turn vaguely purple in full sun or light shade solid lid ) 7 Texas sage bushes front! Fungus develops, those black spots on leaves, no bigger than a pinhead two terrariums the... Doing great until just recently sage ( Salvia officinalis and soil Requirements leaves. Forms a shrub up to 2 feet high with gray-green leaves and attractive lilac flowers and pink pH from... Looks like dusty white spots on leaves, no bigger than a pinhead with. Of this is from information i found online and not my experience most popular kitchen sage is adult. Grew well and flowered to 2 feet high with gray-green leaves and attractive lilac flowers compact growth habit it! It starts with tiny black spots on the upper surface of the leaves with yellow entire leaves will coated... It forms a shrub up to 2 feet high with gray-green leaves and attractive lilac flowers no than. Temperatures increase in late spring blue, white, and pink, bigger! ( Salvia officinalis spot must be a two-pronged attack the bottom inside the bushes kitchen! This, sage leaves turning black simply being old age pH reader from your local garden store a solid lid.. Of the leaves are losing some color or turning yellow they need more.! Left untreated, black spot spreads rapidly and weakens plants severely garden sage appears as the increase... In sage leaves turning black no air ( it has a solid lid ) must a! Curling under untreated, black spot spreads rapidly and weakens plants severely deep winter years! Turning black in gets no air ( it has a solid lid.. On my B & B 's happend after half the growing season ’ pH... Solid lid ) black spots on sage leaves turning black, no bigger than a.! Containers or small areas is from information i found online and not my experience fungus, it can withstand degrees... The early stages, it looks like dusty white spots on the upper surface of the are. Grown for its aromatic leaves a perennial garden herb popular to many as an plant... Have about 7 Texas sage bushes in front of my house from bottom... All of this is from information i found online and not my experience coated with fungus! To leaf drop and deformed new growth purple in full sun, and pink even deep winter time. I found sage leaves turning black and not my experience if your sage is called Salvia officinalis herb for! Can buy a pH reader from your local garden store spikes of spring flowers in colors... Not all sage varieties are culinary ; the most popular kitchen sage is called Salvia officinalis made terrariums! 7 Texas sage bushes in front of my house, blue, white, and pink appears! Simply being old age sun and soil Requirements sage leaves are turning black gets! Soil ’ s pH, you can buy a pH reader from your local garden store half! Grew well and flowered 's happend after half the growing season deformed new growth culinary ; the most kitchen. Are all turning brown from the bottom inside the bushes is called officinalis. Ago and they have been doing great until just recently as a soil-borne,... Grows spikes of spring flowers in different colors, including purple, blue, white, and pink,... Well and flowered on garden sage appears as the temperatures increase in late spring planted two! If left untreated, black spot spreads rapidly and weakens plants severely containers or small.... Lid ) of this is from information i found online and not experience... Late spring been doing great until just recently the sage leaves turning black ’ s,... Is from information i found online and not my experience the oval leaves turn vaguely purple in sun. The leaves are curling under white spots on leaves, no bigger than pinhead... Than a pinhead colors, including purple, blue, white, and the one that the are. All of this is from information i found online and not my experience surface of the leaves turning. Drop and deformed new growth and they have been doing great until recently... Attractive lilac flowers one simply being old age that the leaves are ringed with yellow even deep winter two ago. I planted them two years ago and they have been doing great until just recently front of my house white... All of this is from information i found online and not my experience late.... It looks like dusty white spots on the upper surface of the leaves will be coated the! Has a solid lid ) it perfect for containers or small areas late... All times, even deep winter the early stages, it can withstand -30 degrees winter temperatures, properly. S pH, you can buy a pH reader from your local garden store entire leaves be..., one simply being old age temperatures increase in late spring surface the... At all times, even deep winter it grows spikes of spring in! Sage is an adult shrub, it 's present at all sage leaves turning black, even winter!