Bulb vegetables can be recognized by their characteristic smell. They are an important source of vitamins, minerals, essential oils and other beneficial substances. They decrease blood sugar levels and work as a natural antibiotic. They include onion, garlic, leek, chives and others. They don’t need a lot of nutrients and you don’t have to fertilize them – especially avoid organic nutrients. In the period when bulbs are gaining their size, they need sufficient amounts of water. However, generally they don’t need to be watered every day as they don’t lose moisture as soon as other plants.