How Do You Use Whey for Plants

To apply the same amount of nitrogen using whey, mix the whey half-and-half with water. This will supply 0.1 ounces of nitrogen, 0.04 ounces of phosphorus and 0.12 ounces of potassium per gallon. Use the mixture in place of regular fertilizer every other time you fertilize.

Can I give whey to plants?

Rather than throw out leftover whey from making cheese, re-purpose it to water and fertilize plants. … Plants will still need regular water, but watering with whey is a good supplement to fertilizers and it can improve soil conditions for plants that prefer a low pH.

Is whey good for the soil?

Whey applications do not have a detrimental effect on the pH of soils which are well limed and near neutral. However, whey added to soils with a pH of 5.0-5.5 may temporarily increase the soil acidity to a point which is injurious to plant growth.