Consider lighting if you find no sign of the flat, oval insects, which can measure from a … I adore my sage plant. In the early stages, it looks like dusty white spots on the upper surface of the leaves. It started last week after rain: Some leaves of my sage (the ordinary, culinary kind) looked a bit crumpled. Sage (Salvia officinalis)—also known as Common Sage, Culinary Sage and Garden Sage—is a perennial evergreen shrub found widely in the Mediterranean regions of the world.It belongs to the genus Salvia, which consists of over 900 varieties of shrubs, annuals and herbaceous perennials.This plant is used for its medicinal value and essential oil and also as a flavoring and seasoning ingredient. Both mealybugs and excessive light cause houseplant leaves to curl. It has purple, white, or pink flowers and oblong, gray-green leaves that are covered with a fine fuzz. Blooms from late spring or summer through fall (all year in the Tropical South); 4- to 12 inches stems bear 2 inches flowers that emerge from 1 inches calyxes of same color. It is a fungal disease. Sage leaves yellow if the plant is being kept too wet and plants that are getting splashed with water on a frequent basis are likely to develop leaf-spot fungus. Be sure to give plants about a week to harden off. The more affected leaves have curled upwards. I think the plant had plenty of water. Culinary sage or Salvia officinalis is a perennial herb that is native to the Mediterranean. Since I repotted with the humus and manure last night the leaves have straightened out a bit but I think both the sage and rosemary suffered a little transplant shock from me … If your sage is an adult shrub, it can withstand -30 degrees winter temperatures, if properly covered. That’s the way I grow sage. Part of the mint family, sage grows into a bushy plant up to two-feet tall and two-feet wide. Starting Sage. Transfer when the seedlings are several inches tall. Leaves are bright green, heart shaped, 24 inches long. Powdery mildew on garden sage appears as the temperatures increase in late spring. It should be planted in full sun, although some afternoon shade is tolerated. Their tips are completely dry and break when touched. Plant 8-10 seeds per 6-inch pot and cover lightly with soil. Basic requirements Sage is a grows best in a well draining, rich, clay loams with a pH between 6.5 and 7.0. If your sage plant is established, but still young, you have a little more leeway with the temperature—keep it about 55 degrees to 85 degrees. Sage plants require warm temperatures and ample sunlight in order to produce a high essential oil content in the leaves. I see what you mean with curled up leaves with your pics in your post up there, but the curling on my leaves is much more pronouced... it's litteraly doing spirals... anyway, I moved a plant in my room were it gets more humidity, and I starting to aclimate one to the outside to see what she thinks of it... thanks for the help.. It goes through wilting stages but I just cut off a bunch of branches and it seems to thrive all over again. Can be ravaged by Mexican giant whitefly. If it's the entire plant, or a great deal of the plant, it's likely that it's getting too much water. Plants vary in size from compact 1 feet dwarfs to 3- to 4 feet kinds. Thin out seedlings so that you have one sturdy plant per pot. Today lots of leaves are dark brown at the edges and/or tips. Sage does best when grown in full sun and watered once a week, fairly deeply. The leaves are wilting and curling and turning crispy brown. Keep soil moist. As it develops, entire leaves will be coated with the fungus and it leads to leaf drop and deformed new growth. Sage can also be grown from softwood cutting. Not curling up, but curling in a downward spiral with the bottom on the inside. Mealybugs also cause yellow or white spots on the foliage and a sticky substance on the plant or nearby furniture. Could it be too much water causing this?