Sap guttation – there’s lots of speculation about what it is. No one knows for sure. Many growers who have run into this agree that the type of sap produced is sweet and doesn’t contain much (if any) THC. It is mostly made of sugar and water and so is not smokable. Seems to be related to the plant over-producing sugars, and sap productions is more common when Plants being in the flowering stage.
Using sugar supplements like molasses, Botanicare Sweet, Sugar Daddy, etc.
Big temperature difference between night and day, especially if it gets cold at night.
Certain strains or individual plants seem more likely to produce sap ,Yet sometimes oozing sap seems to happen for no known reason ...
Xylem is one of two pathways (phloem is the other one) in a plant's vascular system that transports water and nutrients, through a process called transpiration.
During transpiration, the xylem and phloem help transport dissolved minerals throughout a plant from its roots into its branches and stems.
Some nutrients, such as boron, calcium, copper, iron, manganese, molybdenum, and zinc, can only move upwards in the xylem. Others can flow both up, down, and throughout the xylem. Such nutrients include the macro-nutrients: magnesium, nitrogen, phosphorous, potassium, and sulfur.
Xylem is a part of a vascular plant's anatomy. Along with the phloem, they make up the 'nutrient highway' in the plant in which nutrients travel. Excess water transported by the xylem is “exhaled” by the plant through its stomata. On cannabis plants, the stomata is on the underside of the leaves.
Xylem sap can sometimes ooze out of the stomata (appearing like dew but formed at night when stomata are closed) in cannabis plants by a process known as “guttation”.
Cannabis growers should be cautioned about using pesticides on their crops as any pesticide that the plant has absorbed may weep out in the xylem sap.
This same xylem sap can cause burning of cannabis leaves if nutrient levels are too high. This will be visible on the leaf surface and appear like the efflorescence of winter salts on brick walls and walkways. 👍👍 From The White House