After cleaning the summer crop residues from the soil, enrich it with organic fertilizer, mixing it into the soil with a garden fork. If you want a well-ordered garden and well-spaced vegetables, equip yourself with a long wire, a few sticks and a ruler. Plant the poles at the ends of the plot and stretch the wire between them: that way you will have a precise reference for where to place the small plants you have chosen: broccoli, cauliflower or fennel must be placed in precise rows, every little plant spaced about 25-30 cm apart, so that later on they have the space to develop freely. Even onions and leeks can be planted with the same method, but they can be placed more densely, every 10-20 cm, and the rows can also be closer together, because these vegetables take up little space. Onions and leeks can be grown directly from seed. For this, prepare the ground, rake it well, and then sow the vegetables of your choice by the broadcast method: that is, taking a handful of seeds and spreading them on the ground with a semi-circular gesture. To better spread the vegetable seed you can mix it with light sand or sawdust: in this way you will clearly see the areas that you have already sown, and also those which are still waiting for seeds. If the soil of your garden is very compact, and you want to grow onions and leeks, which develop underground, remember to work the soil by adding a good amount of sand: in this way you will have softer earth, where the vegetables will grow without problems.