Yves Gagnon
Garlic Growing Conditions
Garlic growth, like that of onions, is closely linked to the photoperiod. The bulb begins to form when the photoperiod begins to decrease. It is the energy stored in the leaves that will determine its size. Garlic must therefore develop a maximum of foliage before the summer solstice: this is why autumn sowing is recommended, as early spring sowing is less productive. Garlic tolerates frost well. It is grown in full sun, preferably in light, fertile, and humus-rich soil. In clay soil, it should be grown on beds or ridges. The water supply must be constant during the vegetative development of the plant. However, during bulb maturation, excess water will be detrimental to its preservation; irrigation should therefore be avoided at this stage. Garlic requires mature compost. Amend the soil with 1 t of mature compost per 100 m2. The optimal pH for its cultivation is between 6 and 7.
Garlic Crop Rotation
Garlic is grown in the second year of rotation with plants that require mature compost. Avoid growing another lily on the same surface area for four years.
Garlic Companionship
Garlic is normally grown alone, in rows on a bed. However, it can be grown in association with radishes, parsnips, beets, or leafy vegetables. It can also be grown alongside brassicas. Avoid growing it with peas, beans, and broad beans, as it hinders their growth.
— These valuable tips were written by Yves Gagnon, in the book The ecological cultivation of vegetable plants , Colloidal Editions.