There are several useful combinations that will increase yields by 20-30%.
Onions are unpretentious crops. But they do not get along with many plants. There are a number of crops that are the best "neighbors" of onions.
You shouldn't plant cucumbers, peppers, or cabbage near the onion bed. The plants will compete for minerals and moisture. Therefore, it's better to plant these crops farther from each other.
Gardeners call onions and carrots one of the best combinations. The plants do not interfere with each other's development, and as a bonus there is protection from onion and carrot flies.
The salad allows the "turnip" to grow calmly, become larger and fill with juice. In addition, green crops have a beneficial effect on the taste and aroma of the fruits.
But it should be taken into account that lettuce likes abundant watering. Onions also need to be watered regularly, but it is important not to overdo it, because the vegetable can rot.
Savory has a strong aroma that repels pests from onions and does not interfere with the vegetable's ability to obtain the necessary nutrients from the soil.