Another sign of the disease is black marks on twigs or branches. When we hear the word evergreen, we automatically think of those prickly plants, shining green amid a sea of snow. These infections are generally the result of fungi either from decaying plant matter or from airborne spores and high humidity. Good ventilation and careful watering is recommended. If Lorraine’s palm problem sounds familiar, read on to learn why palm leaves turn yellow (specifically queen or majesty palms). There are some 150 species in the genus Ligularia, most native to the Himalayan region, China and Japan. Plus, get steps to help treat your ailing palm tree. Eventually, in its later stages, the disease causes plant foliage to die back. Dark brown spots with yellow rings are also a symptom of bacterial blight. My Leopard Lily leaves are turning yellow!? Also have 'Crispata' and the Spotted Leopard Plant. Water, whether too much or too little, can cause peace lilies to wilt and the leaf edges to turn yellow or brown. Light, water and fertilizer can all be a factor in the browning of peace lily leaves. Also called the dumbcane plant, the dieffenbachia is a houseplant that grows up to 6 feet tall and 3 feet wide. Shock can cause leaves to yellow. Hi Carol - I have a very nice Giant Leopard Plant (Farfugium) growing in my backyard. All are doing great so far over the past three years. Allow the plant to dry out, placing in a sunny location, if necessary. This change is usually short-lived and goes away after the plant has properly adapted to its new environment. Unless exposed to a hard freeze, the leaves will regrow in spring. Growing a Leopard Plant. Herein, why is my leopard lily dying? Click to see full answer. Leopard plant is evergreen in USDA plant hardiness zones 7 through 10, but the plant dies down if temperatures drop below 30 F. (-1 C.). Tall plants with showy flowers and large leaves fit the bill quite nicely and one of the best plant group that encompasses this description are the Ligularia.. When mass planted, leopard plants make great groundcovers for a woodland garden. John is right, black spots could be indicative of a fungal problem due to water standing on the leaves for too long. If you disturb the root ball by digging and moving the plant abruptly from one setting to another, expect the leaves to turn yellow and even fall off. Powdery mildew – Powdery mildew leaves a white powder-like coating on all parts of the plant. Many different problems can cause dieffenbachia leaves to turn yellow, including disease, insect infestations and cultural problems. Thick leaves reach up to 18 inches across and provide an interesting display when massed under trees, in a shady border or Giant Leopard Plant The Lowdown on Palm Trees with Yellow Leaves. On trees and other woody plant life, a surefire sign of bacterial blight is an oozing wound from which sap seeps out. When a plant is grown in high-humidity and then moved to a person’s home or office where there is less humidity, the change can affect the plant and make its leaves turn yellow. Exposure to direct light can cause the leaves to turn yellow; showing a burnt appearance. Daisy-like yellow flowers bloom on tall, branched stems. I’m pretty new to keeping houseplants and thought I was doing all the right things but he doesn’t seem happy.. any help/ advice please? After adjusting to its new home and roots become established, the plant should put out you, green leaves. As gardeners we are always on the lookout for that plant that will create an impact in the garden. The dieffenbachia is beloved for its large, tropical leaves and easy adaptation to indoor environments. And fertilizer can all be a factor in the browning of peace leaves! 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