After what crops can onions be planted

It is possible to grow a good crop of vegetables only on fertile soil that provides the necessary microelements. Fertilization plays an important role. If the soil is completely depleted, this measure will be temporary and will not give a positive result. The best option is to observe crop rotation. Plants of the same species take the same composition of nutrients and leave spores of fungi and larvae of parasitic insects in the ground. It is not recommended to plant onions after crops affected by the same pests and diseases.

General crop rotation rules

Crop rotation is especially important when a large number of species are planted in a small area. Each of them requires its own soil composition and a set of nutritious minerals and trace elements. During cultivation, plants are fed with fertilizers necessary for their vegetation, and after harvesting, the land is oversaturated with those chemical elements that were not needed. And, conversely, in the soil there will be a shortage of substances that were used during the growing season.

The need to alternate plants of different types on the site is due to the prevention of the spread of infection and parasitic insects. Cultures have their own set of infections and parasites. A fungal infection can completely affect, for example, potatoes and not touch onions at all, or vice versa. Many pests overwinter in the soil in the form of larvae; in the spring, individuals begin active growth; if crops of a species suitable for the pest are planted in the garden, there is a serious threat of crop loss.

When planting, the possible influence of allelopathy (interaction) is taken into account. The root system and the aerial part of plants synthesize and secrete biological substances that act positively or negatively on their neighbors. Onions release phytoncides into the soil, they destroy bacteria that cause decay. If the culture is planted in the garden for several years, the effect is exactly the opposite, young bulbs are subject to rotting.

General crop rotation requirements:

1. Do not use a bed to plant plants with the same nutrient intake.
2. The biological composition released into the soil by the root system is taken into account.
3. It is impossible to cultivate species with the same diseases and insects that parasitize them.
4. In the spring, early vegetables are not planted after late ripening crops, because. the soil did not have time to accumulate a sufficient amount of essential trace elements.

It is recommended to sow the area with green manure after harvesting early vegetables. For onions, buckwheat or clover are good predecessors.

After what crop is onion planted

Onion (Allium) is a photophilous plant that does not tolerate the acidic composition of the soil. With a deficiency of potassium and phosphorus, you should not count on a good harvest. A herbaceous plant is planted to obtain a feather or turnip. Requirements for crop rotation in each case will be different. If planted for feathers, legumes or early radishes are the best predecessors. Recommended precursors:

1. Cabbage. During the growing season, it takes a large amount of nutrients, but their composition is opposite to that of onions.
2. Peas. Consumes few nutrients, ripens early.
3. Tomatoes. The root system of nightshade also releases phytoncides. Their neighborhood is beneficial to each other, they are well suited as predecessors.
4. Beet. The root crop does not grow on an acidic composition, like Allium. The necessary chemical composition for vegetation is different for them. Diseases and pests are different.
5. Pumpkin. It is allowed as a predecessor, but in this case the pumpkin is more useful, the onion disinfects the soil, destroys bacteria.

After growing cucumbers, you can use the bed for planting vegetables, but it is pre-fertilized. For growth, cucumbers need a sufficient amount of trace elements, some of them are the same as the requirements of onions, some are not.

Is it possible to plant onions after onions

You can place a plant on one bed for no more than 2 years. In the third year, the place of the beds is changed. If possible, the plant is not planted more than 1 time in one place. The problem here is not a lack of nutrition, the crop for the next year of planting can be fed. There is a threat of damage to the young growth of last year’s pests and fungal spores accumulated over the season. Saving the harvest will be problematic. The bulb stops developing, the aerial part turns yellow.

Is it possible to plant onions after potatoes

Allium belongs to early ripe varieties, fully matures in 2 months. If the goal of planting is not on a feather, the optimal site for growing a bulbous species is the site that has been vacated after harvesting early potatoes. The main consumption of nutrients in potatoes goes to the formation of tops. During this growing season, the root crop is intensively fed, enough potassium and phosphorus remain in the soil for onion growth. Potato diseases do not affect Allium, they have different pests. Before the onset of frost, the bulb fully ripens. At the request of the crop rotation, the root crop is the best predecessor.

Is it possible to plant onions after carrots

The structure of the root system of cultures is different. In carrots, it goes deep, the consumption of micronutrients comes from the lower layers of the soil. There is sufficient nutrition left for Allium in the upper part of the soil. For growth, they require a different chemical composition, the necessary substances for onions remain intact. Both vegetables have a beneficial effect on each other if they are located on the same bed. The smell of carrot tops repels the onion fly, the main pest of the crop. Phytoncides of a bulbous plant disinfect the soil, destroy bacteria that threaten carrots.

After which crops you should not plant onions

To get a good harvest, it is not recommended to plant a vegetable after a crop that takes the necessary nutrients. Do not use the site where they planted last season:

1. Garlic, since it belongs to the same species, with the same consumption of microelements from the soil, diseases and pests also coincide. It is not recommended to plant herbaceous plants on the same bed, they will begin to crowd out each other, this competition will affect the yield.
2. Corn forms a shallow root system that completely depletes the soil.
3. The area where the sunflower was grown is also not suitable, the sunflower leaves behind soil completely unsuitable for onions.

Conclusion

It is not recommended to plant onions after bulbous crops or plants with the same diseases and pests, at the request of a crop rotation. The land is depleted, the crop during the growing season will not receive enough of the necessary nutrition. If the bed has been used for several years, spores of the fungus and overwintering larvae of pests accumulate in the soil, the young plant is affected at the beginning of growth, the productivity of the crop will be minimal.