Milk As Fertilizer – Good or Bad For Your Garden

Milk is being considered organic compound and a good source of calcium, protein & other nutrients. It is extremely beneficial to human and animals alike. So now the question is that may it also be beneficial for plants? YES, we can use milk as fertilizer, but there are both positive & negative aspects associated with it. Let’s discuss the advantage & disadvantage of using Milk As Fertilizer.

milk as fertilizer

Milk can actually benefit your garden and the plants.


Here are the few positive aspects of using it in the garden:

Milk acts as fertilizer

Milk is a good source of calcium, which can help strengthen the structure of a plant. It also contains some beneficial proteins, vitamin B and sugars that are good for plants which improves their overall health and crop yields. Plants also use calcium for growth. Blossom end rot, which is commonly seen in tomatoes and peppers, is caused by a calcium deficiency. Feeding plants with milk ensures they will get enough moisture and calcium.

Milk can prevent fungus

Milk can be used as an effective anti-fungal agent. Combine 1 part milk to 2 or 3 parts water and spray this mixture on the leaves of your plants every 10-15  days.

Milk can disinfect

When milk is applied in areas with direct sunlight the milk takes on antiseptic-like properties. You can dip your garden pruners in milk to disinfect them instead of bleach.

Milk improves the health of soil

Using milk in your soil or compost pile can make the soil healthier because the soil absorbs the fats and vitamins inside the milk.

Milk can deter some insects

If applied properly, Milk can also be used as pesticides, Cow’s milk can deter some bugs like aphids, thrips, powdery mildew and mites.


Here are the few negative aspects of using it in the garden:

  • Too much of milk is not going to be useful as the bacteria in it will spoil which results in poor growth.
  • Using skim milk may induce black rot and soft rot.


Don’t use milk as a whole. Always dilute it by adding minimum 50% milk & 50% water.



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