
Watering your plants with milk
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Do you have some leftover milk and want to reuse it? Are you wondering if it's a natural fertilizer for plants? Don't throw it away!
We are passionate about green plants and have tested this grandmother's tip.
Milk stimulates plant growth and prevents many problems. Although milk isn't a natural ingredient that wild plants benefit from, it's an effective natural fertilizer that avoids chemicals.
Our article will teach you:
- All the benefits that milk offers to plants,
- The recommended quantity so as not to overdo it,
- Our method for watering with milk.
This solution has the advantage of being ecological , easy to use and inexpensive . So why deprive yourself of it?
1) The Benefits of Dairy Products on Plants
You've probably heard the slogans touting dairy as a source of calcium . Your plants won't get stronger bones from this recipe, of course, but they'll reap many benefits .
Calcium deficiency is observed in a plant by blossom end rot . This is particularly observed in zucchini, tomatoes and peppers.
Its use will improve the overall health of the plant and the yields of its crops. Milk is naturally rich in beneficial microorganisms , proteins , vitamin B and sugars. The enzymes it contains inhibit the growth of mold and bacteria. However, milk will stimulate the growth of beneficial microbes in the soil.
Milk is also a remarkable antifungal agent for your plants! It is used to prevent powdery mildew and helps fight against the leaf mosaic virus.
Finally, dairy helps fight aphids and regulates the pH of the soil .

2) Be careful not to overuse it
Like any remedy, milk should be used in moderation . It is an excellent supplement and is not a substitute for watering.
Indeed, the bacteria it creates degrade, eventually causing an odor and slowing the growth of your plant. This odor appears particularly during the decomposition of milk fats. We will therefore direct you in our recipe towards skimmed or semi-skimmed milk rather than whole milk.
To avoid this problem, simply water and spray your plants every 3 months, no more.
- How do you know if you've added too much milk?
Pay attention to the smell, the appearance of rot, as well as wilting.
These natural phenomena may put you off a little, but rest assured, the advantages far outweigh the disadvantages! If the natural reactions of milk scare you, discover Watering with Tea !

3) The Method for Watering Your Plants with Milk
A) What milk should I use?
This method works with fresh, pasteurized, powdered milk... But we recommend recycling your expired semi-skimmed milk or your leftover bottles !
B) How to prepare your recipe?
It's very simple: dilute the milk base in water ( 50/50 )
C) How to apply milk to your plant?
By spraying the leaves (preferably not the flowers) or watering the soil .
When spraying, the leaves absorb the milk. You must be careful not to apply too much to avoid residue. If this happens, you will need to wipe the foliage gently.
As usual, avoid watering during the hottest times of the day.
D) What accessories should I use?
If you are indoors, we suggest using a small designer watering can and a matching spray bottle .
For outdoor use, we recommend a pump sprayer , as well as a larger Parisian watering can !
E) When should I apply milk to my plant?
You can prioritize the growing season, then start again mid-season or simply apply every 3 months .
F) What to do when there are odors?
Don't worry, it only lasts a few days and is not serious at all. Just water with a little water ;)
Grab your watering can and take action!
As you can see, plants are always fond of a little bit of milk that you might have thrown away. Repurposing it as a natural fertilizer is a fun way to recycle it.
With all this information, you now have the cards in hand to fertilize your plant with milk, without overdoing it.
So grab your watering can and dilute a little milk in your watering can! If you're not currently equipped, our range should interest you...
Discover our Golden Watering Can now by clicking on the photo!
Rahmouni ghaoutia
Merci pour vos bons conseils.
Je voudrais savoir si je peux arroser mes plantes de décor intérieures et extérieures avec le sérum biologique que je récupère après avoir filtré le lait de vache naturel en fabriquant du fromage …merci encore et salut à vous.
Marie G.
Merci pour cet article.
Je rince toujours mes bouteilles de lait avant de les déposer dans le bac de recyclage et je me sers de cette eau pour l’arrosage au jardin.
Bien cordialement,
Liothaud
Très bonne information 👍
Très clair
BRAVO à vous