Remove all infected leaves and debris and apply a copper-based fungicide to prevent further spread. The Phytophthora palmivora fungus can attack money tree plants, causing dark brown to black water-soaked spots on leaves that turn papery as the disease progresses. For the past few weeks, its leaves have begun to curl at the tips, and some of the leaves have almost completely folded along their spines. The fallen leaves might be a response from having moved the plant to a new location. The money tree is forgiving of beginner's mistakes like forgetting to water or apply fertilizer; it requires little care at all. Do not leave yellowing leaves on until they turn brown since it can spread decay to other parts of the plant. Why the Leaves on Your Houseplant Are Turning Brown on the Tips Brown tips are a warning sign that something is going wrong with your houseplant care regiment. Overwatered money trees may also wilt. (If you had called it a Malabar chestnut, I would have suspected you were growing it as an outdoor plant.) For a couole years, he was healthy at my desk, however 3 … In the case of leaves turning brown, curling up, and falling off, leaf scorch may be the likely culprit. Apply too much fertilizer or water, and the money tree's leaves wilt to show its displeasure. Brown spots can sometimes occur on the money tree when a fungal disease known as leaf spot occurs. Whole leaves may turn yellow and prematurely drop from the pachira aquatica. These leaves will eventually curl up, wilt, and drop off. Recently my money tree began growing new stems and leaves and the old, large beautiful leaves began to brown and wilt on the edge and then fall off. At times it's really flourished, and has come back from the brink of plant death once. Some of the leaves may first turn yellow before turning brown. Many houseplants, including money trees, suffer from insect pests such as spider mites and mealybugs, according to the California Rare Fruit Growers Inc. The Leaves Are Turning Yellow & Brown on My Money Tree ... A variety of conditions can cause yellow or brown leaves on the money tree.