They just do that, it’s not a pest. They vent excess fluid along the leaf veins, a phenomenon called “guttation”. This is due to water absorption by the roots when the stoma are closed. This leads to increased internal fluid pressure, which is relieved through structures called hydathodes, basically pressure relief valves in the vascular system. Many type of plants have these, usually located along veins of leaves, or at leaf edges. Frequent guttation can be a sign that the plant is overwatered, or the soil doesn’t drain sufficiently, since it only happens when lots of moisture is present in the root zone. But, some plants are just prone to it normally, and Cissus tuberosa seems to be one of them.
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They just do that, it’s not a pest. They vent excess fluid along the leaf veins, a phenomenon called “guttation”. This is due to water absorption by the roots when the stoma are closed. This leads to increased internal fluid pressure, which is relieved through structures called hydathodes, basically pressure relief valves in the vascular system. Many type of plants have these, usually located along veins of leaves, or at leaf edges. Frequent guttation can be a sign that the plant is overwatered, or the soil doesn’t drain sufficiently, since it only happens when lots of moisture is present in the root zone. But, some plants are just prone to it normally, and Cissus tuberosa seems to be one of them.