Good luck with your petunias! 0 0. I'd guess you have aphids. The pattern on each ‘Night Sky’ flower can change with the temperature, so many of your blooms might transform as the growing season progresses. These spots … 1 decade ago. My petunias have gotten these white specks on them. Plant petunias in beds or containers for best results. The cause may be excess moisture in air and soil. However, these insects are hard to see and their presence may go unnoticed. My pertunias have little white spots on the flowers - that just came up over night and look like paint splatters almost. every thing looks healthy just seem to get them. They come in many colors and bloom profusely from early summer. The disease manifests as brown spots on the branches and leaves of petunias. Can anyone tell me what this is and how I get rid of them? It seeps through the roots and spreads through the ground part of the plant. Q: I’m seeing petunias with white spots on the flower petals. Another landscape phenomenon has created a little controversy as it occurs on Mexican petunia (Ruellia species). May be Thrips Damage . A vector of the disease is a fungus that inhabits the soil. If the white spots are not little white bugs your plants may have to much or to little fertilizer. If a petunia flower is kept constantly moist, the mold will turn the bloom into a gunky mess. There are no spots on the foliage. Petunias are plants that belong to the Solanaceae family, and there are over 35 different species of the plant that are all native to South America. ETXGardener. They vary a lot in color, but this is an annual that is easy to grow and will complement any garden. Hello every grow I do I seem to get these white silver spots on my leaves, does anyone know anything about why I get them? This has been a bonanza year for thrips. my grow in coco 2x 600 hps 6in inlet,outlet temp 27 ph 5.9 ec 1.4 I can't tell if they are bugs or if it's just debris. Needs well-drained soil. Grows in zones 9-11. Infected leaves can twist, break, turn yellow, and dry out. Petunias (Petunia x hybrida) make showy additions to flowerbeds, hanging baskets and pots or containers. Blast them off your plants with a hard stream of water or spray ther leaves with a solution of 10% Ivory liquid & 90% water. Petunias are annual plants that look striking in a garden, and they will bloom all summer long with the right care. very weird. Blast them off your plants with a hard stream of water or spray ther leaves with a solution of 10% Ivory liquid %26amp; 90% water. Diseases of petunias. Powdery mildew is a fungus that looks like flour dusted on plants, often in circular spots. Petunias are a lovely flower that is actually related to the potato. ... Good luck with your petunias! In general, cooler temperatures will yield more white spots and warmer temperatures will cause the petals to be more purple. Petunias (Petunia x hybrida) fill many needs in the landscape, including mass plantings, borders, ground covers, hanging baskets and containers.The plants also work well in rock gardens or planted where their trumpet-shaped flowers and ovate leaves cascade over walls. It most commonly appears on leaves, but can also attack stems, flowers, and fruit. Plants are developing white woolly patches on their leaves and stems and people are wondering if it was powdery … OK, This is NOT a disease! Reply:I'd guess you have aphids. White Spots on Petunias, Roses . You can find them in pure white, or in white paired with bright colors. Plant in full sun. These plants technically grow as frost-tender perennials in U.S. Department of Agriculture plant hardiness zones 10 through 11, although most people treat them as annuals. A: It’s probably gray mold, Botrytis cinerea, a common disease of flower petals. The population has exploded this spring and summer, causing a lot of damage to local flowers. 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