Top dressing of tomatoes onion peel


Today, there is a wide range of chemicals available for feeding tomatoes and controlling their pests and diseases. However, instead of expensive and toxic substances, it is better to pay attention to the available natural products, which are equally effective. One of them is the onion peel, about the beneficial properties of which were known in ancient times. Onion peel, as a fertilizer for tomatoes, is successfully used by gardeners to feed tomatoes and other vegetable and fruit crops.

Onion scales with regular use will be an excellent fertilizer for tomato seedlings, due to the content of a large number of useful substances.

Chemical composition

The amazing properties of onion peel due to its unique chemical composition. Organic and mineral compounds contained in flakes are characterized by high biological activity.

Provitamin A

Carotenoids that make up the onion peel, perform several important functions:

  • they are indispensable as a source of vitamin A, which has protective properties in the fight against fungal diseases;
  • these compounds are known as good immunostimulants;
  • their antioxidant effect is explained by the ability to bind atomic oxygen formed during photosynthesis.

Antimicrobial Volatiles

Phytoncides secreted by onions are highly effective in combating pathogenic microorganisms that breed in the soil layer and fungal diseases affecting tomato seedlings. Particularly high concentration of phytoncides in onion scales. These volatile substances are better preserved in its water infusion.

Vitamins of group B

Interacting with phosphoric acid, thiamine forms cocarboxylase, a coenzyme that accelerates metabolic processes in plant cells. Due to this, when feeding tomatoes with an infusion of onion peel, the growth rate of seedlings increases, their root system becomes stronger, and the stage of fruiting begins more quickly.

Vitamins PP

Nicotinic acid contained in onions and its surface scales promotes the development of the root system of tomatoes, even on unfavorable clay soils. The combined effect of vitamins B1 and PP increases the rate of assimilation of nitrogen, phosphorus and other minerals, accelerates the formation of chlorophyll in the leaves of tomatoes.


Onion peel has a high content of one of the natural flavonoids with strong anti-inflammatory and antioxidant properties - quercetin. Especially a lot of it in the scales of red onions. It is useful for the health of young, still weak sprouts of tomatoes.

Vitamin C

The effect of vitamin C is not well understood, however, it has long been known as a strong antioxidant. And recent research scientists found that ascorbic acid contributes to the development of a special enzyme necessary for plant growth.

Feeding tomatoes with onion peel

Infusions and decoctions made from onion scales are a universal fertilizer for tomatoes. They have many useful properties.

Their advantages

Onion scales - a natural product with a number of characteristics that distinguish it from others:

  • it will never harm young tomato sprouts;
  • attract its availability and lack of need for material costs;
  • it is non-toxic and does not require the use of chemical protective agents;
  • recipes for preparing the infusions of onion peel are simple and easy;
  • the concentration of trace elements and vitamins in the husk is higher than in the bulb itself.

Why is this fertilizer useful?

Regular feeding of seedlings of tomatoes with onion scales is useful in any period, from the moment of their planting to the period of fruit ripening:

  • when yellowing leaves of tomatoes can be processed diluted infusion of onion peel;
  • lightly spraying the seedlings every week will help speed up the formation of ovaries;
  • watering and spraying will increase the yield of tomatoes and help improve the microflora;
  • The absence of onion peel of nitrates ensures their safe disposal.

The rate of watering for each bush of tomatoes in the first weeks after planting 0.5 liters of liquid, and a month later it is tripled.

Important! Top dressing tomatoes onion peel should be carried out in the evening, after it is not recommended to water the plants.

Onion flakes as a medicine for tomato seedlings

Due to its anti-inflammatory properties, onion peel is an excellent tool for combating various diseases affecting tomatoes and harmful insects:

  • an infusion of a glass of dry raw material per liter of water, aged for 24 hours, helps against black leg disease;
  • To get rid of aphids and spider mites, tomato bushes are sprayed with the same solution with shavings added;
  • spraying and watering with water infused on onion scales will help in the prevention of tomato bacterial cancer and in the fight against tobacco thrips;
  • from the appearance of black or gray rot protects watering diluted infusion, after 5-6 days after planting seedlings, as well as its flowering.

Features of the use of bulbous scales

Onion peel is indispensable for feeding tomatoes in any form - decoctions, tinctures or powdered crushed raw materials.

The decoction is prepared very simply:

  • onion scales are poured with water in an enamel pot;
  • boil and cool the mixture;
  • After filtering the solution and, if necessary, diluting it, you can use it.

This means you need to water the seedlings of tomatoes up to three times a week or spray the leaves to destroy pests. A stronger decoction is used to disinfect the soil under the bushes. Such watering will be a good feeding and strengthen the root system of tomatoes, contributing to their better growth and fruiting.

To prepare the infusion, you need to fill in the dry onion peel twice the amount of boiling water and incubate for two days. Before use, it must be diluted with three or five times the amount of water, depending on the purpose of use. Seedlings of tomatoes must be watered infusion three days after planting. During growth it is also necessary to treat them with tomatoes to prevent diseases or pests. Spraying should be carried out in the period of fruit ripening. Pre-should in the infusion dissolve a small amount of soap for better sticking it to the leaves.

Important! The infusion should be used immediately after preparation, as it loses most of its beneficial properties during storage.

Onion peel as a fertilizer for tomatoes can be applied to the soil before planting seedlings or pour under the bushes of tomatoes. When watering nutrients will be washed out of dry scales, and saturate the soil under the plants. Preliminary material should be prepared as follows:

  • sorting out raw materials, select healthy onion scales;
  • dry them using any available method - in the oven, microwave or in the open air;
  • to grind and bring to the soil, at the same time loosening it.

They will be an excellent dressing for tomatoes.

Recipes cooking infusion

The concentration of infusions depends on the purpose of application. For spraying tomatoes against harmful insects, it is made more saturated - two glasses of dry scales are poured with a glass of boiling water. The infusion is aged for up to four days, and then diluted with two times the volume of water. Before processing, you should dissolve the soap chips in it. Three spraying should be repeated after a week break.

To disinfect the seedlings of tomatoes and the soil around them, an infusion is prepared from one bucket of water and a glass of dry raw materials. The mixture is brought to a boil, then infused for several hours. The resulting solution is used to water the tomatoes and process their leaves on both sides.

To process the tomato seedlings from aphids can fill the glass of scales with a bucket of boiling water. After sustaining for 12 hours, it is necessary to strain the solution and treat the affected bushes. The procedure should be repeated every four days. The recipe is suitable for the preventive processing of tomatoes.

Important! The remnants of scales after filtering infusions and decoctions do not need to be thrown away - they will benefit as part of the compost.

Top dressing tomatoes onion peel is popular with gardeners, thanks to the “two in one” effect that it provides. Processing it with infusion is not only an excellent fertilizer for tomato seedlings, but at the same time it disinfects the soil and the plants themselves from the effects of harmful microorganisms.