Growing onions in plastic bottles is a fun, space-saving way to keep a continuous supply of fresh green onions at home. This easy, eco-friendly method requires only a few materials and minimal care, making it perfect for small spaces or even apartment gardening. Here’s how to set up your onion-growing system in just four steps!
Step 1: Gather Your Materials
- Plastic bottle: A large bottle (2-3 liters) works best. Clean and dry it thoroughly.
- Onion bulbs or onion sets: Small bulbs are ideal as they’re already primed for growth.
- Potting soil: Lightweight soil ensures good drainage and root growth.
- Knife or scissors: For cutting holes in the bottle.
Step 2: Prepare the Bottle
- Cut several small, circular holes along the sides of the bottle, about 1–2 inches in diameter. Space the holes evenly around the bottle, leaving enough room for each onion to sprout.
- Leave the top of the bottle open and create small drainage holes at the bottom to prevent water buildup.
Step 3: Add Soil and Insert Onions
- Begin by filling the bottle with a layer of soil, just enough to cover the bottom.
- Place an onion bulb into each side hole, with the sprouting end facing outward. Once a layer is complete, add more soil, pressing it down gently around each bulb.
- Repeat this layering process, adding soil and bulbs, until the bottle is full.
Step 4: Water and Position
- Lightly water your bottle until you see water draining from the bottom. Keep the soil moist but avoid overwatering.
- Place the bottle in a sunny location, like a windowsill or balcony. Onions need at least 4–6 hours of sunlight daily to thrive.
Harvesting and Maintenance
- In about two to three weeks, green shoots will begin to appear. Snip off the greens as needed for cooking—they’ll regrow for multiple harvests.
- Check the soil regularly and water whenever it feels dry. You’ll have fresh onion greens continuously with very little effort!
By recycling plastic bottles into a unique garden, you’re growing food sustainably and saving money. With this simple method, enjoy a homegrown supply of fresh onions all year long!