What types of plant nutrients does coffee have in it when watering?

Answer 1

Coffee beans are roasted seeds from the fruit of the evergreen coffee tree. Like other nuts and seeds, they are high in proteins (11 percent), sucrose and other sugars (8 percent), oils (10 to 15 percent), assorted organic acids (6 percent), B vitamins, iron, and the central nervous system stimulant caffeine (1 to 2 percent). With the exceptions of caffeine, none of these nutrients is found in coffee.

Like spinach, rhubarb, and tea, coffee contains oxalic acid (which binds calcium ions into insoluble compounds your body cannot absorb), but this is of no nutritional consequence as long as your diet contains adequate amounts of calcium-rich foods.

Coffee's best known constituent is the methylxanthine central nervous system stimulant caffeine. How much caffeine you get in a cup of coffee depends on how the coffee was processed and brewed. Caffeine is water-soluble. Instant, freeze-dried, and decaffeinated coffees all have less caffeine than plain ground roasted coffee.

Answer 2

Coffee grounds can add nitrogen, potassium, phosphorus, and other minerals to the soil as it breaks down, making it a beneficial plant fertilizer when used in moderation. However, using too much coffee grounds can make the soil too acidic, so it's best to incorporate them with other organic matter when watering plants.