Table of contents:

Preparing The Soil For Planting Onions
Preparing The Soil For Planting Onions
Video: Preparing The Soil For Planting Onions
Video: Growing Onions In Raised Beds And Containers | Secret Soil Mix 2023, February

← Read the previous part "Interesting varieties of onions"

Site selection and soil preparation

growing onions
growing onions

The special exactingness of onions to soil fertility determines the choice of a site for its cultivation. Warm and sufficiently moist soils are taken under the onions - sandy loam or light loamy is better. Cold, damp soils with a close location of groundwater, as well as marshy, peaty, acidic, with a pH of 4.5-5.0 are not suitable.

Soils with a lower acidity (pH 5.0-5.5) can be used for onions only after adding lime to bring the pH to 6.0-7.0. If horsetail, sorrel grow on the site, this indicates acidity of the soil. It is necessary to add chalk or ground limestone, depending on the texture and acidity of the soil. It is better to grow onions 1-2 years after adding lime.

The area where onions are grown should be open and well lit.

In an individual garden, it is especially important to observe the correct alternation of crops and change the place under the onions annually. It should not be grown in the same place, as it is affected by pests and diseases. It can be returned to its old place not earlier than in 2-3 years. The best predecessors for onions are crops for which large doses of organic fertilizers were applied: cucumber, zucchini, early cabbage, potatoes, tomatoes, etc. Onion itself is a good precursor for all vegetable crops, except for garlic, with which it has common pests and diseases. It is advisable to plant onions at a considerable distance from perennial onions.

growing onions
growing onions

The soil for the onion must be processed very carefully. Processing begins in the fall, after harvesting plant residues. The soil is dug to a depth of 20-25 cm. It is not necessary to break up the formed clods and level the soil surface in the fall, since the uneven blocky surface contributes to better snow retention and moisture accumulation.

The main purpose of pre-sowing soil cultivation is to cut it to a fine crumbly state. As soon as it is possible to enter the site in early spring, the topsoil must be loosened with a heavy rake to a depth of 5-8 cm in order to preserve the moisture accumulated over the winter. After the soil warms up and dries up, i.e. after 5-7 days, it is dug up to a depth of 15-18 cm.

Spring digging is always done 1/3 shallower than in autumn, so as not to turn out to the surface the top layer with pests and pathogens inhabiting it, which was sealed during autumn processing to a great depth. If the soil is loose, structural and does not apply organic fertilizers, in the spring you can limit yourself to deep (15-18 cm) loosening. After deep tillage, it must be immediately leveled and loosened with a light rake to a depth of 3-5 cm.

In the North-West of the Non-Black Earth Zone of Russia, onions should be grown in ridges. They warm up better, and since here the onion most often does not have enough heat, it ripens faster; in addition, the ridges create better conditions for aeration, especially in wet years. Onions are best watered in furrows, and the ridges provide all the conditions for this. When watering from above, the bulbs ripen poorly and are poorly stored. It is more convenient to locate ridges from north to south. This contributes to better lighting of the plants. The optimum bed width is about 1 m and a height of 20-30 cm. Before sowing, the soil must be slightly compacted.


The onion root system is located mainly in the surface layer of the soil, so fertilizers are applied shallowly. Onions require a small amount of nutrients, but it is difficult to meet the need for them, since the root system is poorly branched. Very slowly, onions absorb nutrients in the first two months of growth, more intensively - towards the end of summer. It is especially important to supply plants with nutrients during the initial period of life and during the period of bulb formation. It is noticed that the yield increase in onions is greater when applying mineral fertilizers than organic ones.

Fresh manure is not applied under the onion, only under the predecessor. If the soil is poor in organic matter, before plowing or digging in the fall, the soil is filled with humus or compost (3-5 kg ​​/ m²) or rotted manure is introduced. Mineral fertilizers not only increase the yield of onions, but also have a positive effect on its keeping quality. A good fertilizer for onions is wood ash - 0.5-1.0 kg / m². It not only provides plants with micro- and macroelements, but also reduces the acidity of the soil, which oppresses plants.

Onion plants have poor salt tolerance, they are sensitive to the concentration of the soil solution, so the doses of fertilizers should be small. With layer-by-layer application, nutrients are distributed evenly over the entire depth of the root layer and are absorbed by the plant as needed. Therefore, mineral fertilizers: ammonium nitrate 15-20 g / m², superphosphate 25-40 g / m², potassium chloride 10-15 g / m² are applied to a depth of 8-10 cm, and 2/3 of phosphorus-potassium fertilizers are applied in the fall, and the remainder and the full dose of nitrogen - in the spring.

Continue reading "Growing onions through the set" →

All parts of the article "Growing onions in the North-West region"

  • Part 1. Biological characteristics of onions
  • Part 2. Interesting varieties of onions
  • Part 3. Preparing the soil for planting onions
  • Part 4. Growing onions through the set
  • Part 5. Growing onions from seeds
  • Part 6. Vegetative propagation of onions
  • Part 7. Growing green onions

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