Onion Seeds

To grow large, firm onions on a terrace, use a loose, well-draining potting mix- Multiplex Urban Green Prithvi to ensure the bulbs can expand easily without soil resistance. Never bury your onion sets or seedlings too deep; only the very base should be underground, as keeping the "shoulder" of the bulb exposed to the air as it grows encourages it to swell significantly larger. Once the tops begin to yellow and fall over naturally, stop watering immediately to allow the outer skins to dry and cure, which prevents rot and ensures your harvest lasts for months.