Plant manure : what are they used for in the garden?

Vegetable manure

Since the banning of pesticides for private individuals, amateur gardeners are increasingly using alternative and ecological solutions.

Among them, the liquid vegetable fertilizer: simple to manufacture, economic, organic… They can act as fertilizers, repellents or fungicides. Discover their uses.

Plant manure

Photo herb007 in Pixabay

Vegetable fertilizers are often presented as old grandmother’s remedies.

However, most of them were first experienced in the 1990s and 2000.

Scientific research has not confirmed its effectiveness, but advice on its use is widely shared among amateur gardeners and more experienced gardeners.

From one garden to another, from one crop to another, the results are not always similar.

We advise you to try different liquid fertilizers according to the wild plants available in your area and see what works best for your plantations.

In any case, plant manure, rich in minerals and nitrogen, has undeniable fertilizing properties.

They help the growth of plants, structure the soil and strengthen resistance to external aggressions. In general, they act more preventively than curatively.

What is the manufacturing process of a vegetable fertilizer?

The process is the same regardless of the plant used for the liquid fertilizer. It involves the maceration of the plants in water to extract the maximum amount of active ingredients.

Some liquid fertilizers are marketed but can be homemade.

A 100% ecological and economical solution!

  1. Use 1 kg of freshly harvested plants for every 10 kg of water (preferably rainwater).
  2. You can also use 200 g of dry plants instead of fresh plants. This makes it possible to produce your liquid fertilizer at any time of the year. Please note that maceration can only take place at an ambient temperature between 10 and 23 °C.
  3. Leave the plants with the water in a closed, non-metallic container.
  4. Stir the mixture daily. After a few days, bubbles form: fermentation is underway!
  5. After a week to ten days, the bubbles disappear: the liquid fertilizer is ready.
  6. Keep these containers away from light, in a cool place such as a basement, in airtight containers. The compost can be used for several months.

Once made, the mixture should be diluted in 5 to 10 times its volume of water to water at the foot of the plant, or sprayed in a pure solution and diluted directly on the plant.

Be careful, a little liquid manure can have the effect of burning the plant, so find out before spraying directly on it.

Never macerate different plants at the same time. Create one liquid fertilizer per plant. Then you can mix them during watering.

What plant fertilizer for what use?

Below you will find the uses of the different sludges, shared by both amateur and experienced gardeners.

They may vary from crop to crop, the use of compost is not an exact science but rather an experiment.

Some liquid fertilizers can be complementary and provide a nutritive solution that covers the essential needs of the plant. It is very common to mix nettle manure with comfrey manure.

Nettle plant manure

  • Properties: fertilizer, stimulant, repellent.
  • Uses: plant fortifier, stimulant for replanting and transplanting
  • Prevention: aphids, mites

Comfort dung

  • Properties: fertilizer, stimulant
  • Uses: nourishes the plant, regulates, strengthens the plant against external attacks, improves soil structure.

Horsetail manure

  • Properties: fungicide
  • Uses: makes the plant more resistant to fungi
  • Prevention: mold, crust, rust, peach blister.

Dandelion plant manure

  • Properties: fertilizer, stimulant
  • Uses: stimulates growth, strengthens the plant’s immune defenses

Elderberry vegetable manure

  • Properties: fungicide, insecticide
  • Uses: helps plants to grow, strengthens their immune system, keeps rodents away
  • Prevention: caterpillars, aphids, keeps some rodents away.

Cappuccino manure

  • Properties: fungicide
  • Uses: reinforces the plant’s immunological defenses, strengthens its resistance.
  • Prevention: slugs, larvae, caterpillars, aphids

Rhubarb dung

  • Properties: repellent, insecticide
  • Uses: repels certain insects
  • Prevention: aphids, caterpillars, larvae, slugs, worms, etc.

Absinthe purine

  • Properties : repellent
  • Uses: keeps slugs and some insects away
  • Prevention: slugs, caterpillars, larvae

Garlic manure

  • Properties: fungicide, insecticide
  • Uses: repels certain insects, improves plant resistance.
  • Prevention: mites, aphids, peach blisters, mold, powdery mildew.

Fern manure

  • Properties: insecticide, repellent, fertilizer.
  • Uses: stimulates the natural defenses of plants.
  • In prevention: aphids, moles, etc.

Borage mud

  • Properties: fertilizer
  • Uses: near comfrey, helps plant grow, helps develop resistance.
  • In prevention: towards

Camomile dung

  • Properties: insecticide, fertilizer
  • Uses: fertilizes, helps develop plant resistance
  • Prevention: aphids, powdery mildew.

Walnut manure

  • Properties: insecticide
  • Uses: repels certain insects
  • In prevention: aphids, caterpillars

Precautions to be taken with liquid fertilizers of plant origin

For several years, plant fertilizers, especially nettle dung, were the focus of a legislative battle to ban them.

The use and marketing of nettle manure is now finally authorized, after some fifteen years of legal disputes. This episode is called the “nettle war“.

Critics argued that its effectiveness had not been proven. Advocates argued that it could work miracles in the garden, and that it could not “do harm” in any case.

Liquid manure from plants is a priori safe for humans and animals. However, it is recommended to follow these few precautions:

  • When using nettle slurry, respect the dosage and dilution rate to avoid any harmful effects.
  • Liquid manure is a product of fermentation, it can have unpleasant odors, even nauseating when the mixture has not been stirred enough: the plants can then rot. Keep your slurry containers away from your neighbors to avoid complaints.
  • Wear gloves when handling plants, some may be itchy or covered with thorns.
  • Gently pour the liquid manure, diluted in the irrigation water, directly at the foot of the plants. As far as possible, avoid direct contact with the flowers or leaves: some mixtures can burn the plants.

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