What you want to ask is onions grown in foam boxes. What if the onion leaves are rotten? Pick the rotten leaves and water them less.

Onions planted in wooden boxes at home are rotten because they absorb too much water. We just need to drain the excess water and poke holes in the bottom of the foam box to reduce the exposure to the sun at noon. As long as you cut the onion and apply some fertilizer, it will soon recover.

Onion is a solitary bulb of Allium in Liliaceae, which is cylindrical, with white bulb skin and sparse reddish brown. Its leaves are cylindrical and hollow, and the top gradually tapers, about as long as the scape. The scape is cylindrical and hollow, and its height can reach 100 cm. Swelling below the middle, with membranous involucre, bulbous umbel, many flowers and small flowers.