In biology, the BBCH-scale for bulb vegetables describes the phenological development of bulb vegetable plants, such as onion, leek, garlic and shallot, using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of bulb vegetables are:
1 Seed sown<br> 2 Onion sets, shallot and garlic<br> 3 For onions, garlic<br> 4 For leek<br>