How to Grow Green Onions Indoors: A Step-by-Step Guide
Craving fresh green onions but don’t have a garden?
No worries! Growing green onions indoors is super simple, space-saving, and perfect for beginners.
Whether you want a steady supply for your recipes or just enjoy the satisfaction of growing your own food, this guide has you covered.
Why Grow Green Onions Indoors?
Green onions (also known as scallions or spring onions) are one of the easiest crops to grow indoors.
Here’s why they’re a favorite among home growers:
- Low maintenance: They require minimal care.
- Fast-growing: You’ll see regrowth within days.
- No soil needed (optional): You can regrow them in water.
- Space-saving: Perfect for windowsills or kitchen counters.
Supplies You’ll Need
Depending on whether you want to regrow from kitchen scraps or start from seeds, here are the basics:
For Regrowing from Kitchen Scraps:
- A bunch of store-bought green onions
- A glass or jar
- Fresh water
- Sunny windowsill
For Growing from Seed:
- Green onion seeds
- Small pots or containers with drainage holes
- Potting soil (preferably organic)
- Spray bottle or watering can
- Grow light (optional but helpful in low-light environments)
Method 1: Regrowing Green Onions in Water
This is the easiest and fastest method, perfect if you’re just getting started.
Step 1: Save the White Bulbs
After using the green tops, keep the white bulbs with roots intact (about 1-2 inches of base).
Step 2: Place in Water
Place the bulbs upright in a glass with enough water to cover the roots but not the tops. Avoid submerging the entire bulb.
Step 3: Provide Sunlight
Place the glass on a sunny windowsill. Green onions love light! Rotate the glass occasionally for even growth.
Step 4: Change Water Regularly
Change the water every 2-3 days to prevent rot and bacteria.
Step 5: Harvest and Repeat
In about 5-7 days, you’ll notice green shoots regrowing. Snip off what you need, and let them keep growing.
Method 2: Growing Green Onions in Soil from Seeds
This method takes longer but is great for a more continuous harvest.
Step 1: Fill Your Container
Use a small pot with drainage holes. Fill it with potting mix, leaving about an inch of space from the top.
Step 2: Plant the Seeds
Sprinkle seeds evenly on the soil surface, then lightly cover with a thin layer of soil (about 1/4 inch).
Step 3: Water Gently
Use a spray bottle or watering can to moisten the soil without washing the seeds away.
Step 4: Ensure Adequate Light
Place the pot in a sunny window. If natural light is limited, use a grow light to supplement. Green onions need at least 6 hours of light per day.
Step 5: Thin the Seedlings
Once seedlings are about 2 inches tall, thin them out by snipping some at the base to prevent overcrowding.
Step 6: Harvest and Maintain
You can begin harvesting when shoots are about 6-8 inches tall. Cut the green tops, leaving the white base so they can regrow.
Indoor Growing Tips
- Rotate your container every few days for even growth.
- Don’t overwater. Keep soil moist but not soggy.
- Feed monthly with a balanced liquid fertilizer if growing in soil.
- Watch for mold or fungus, especially if you’re using water-only regrowth.
Common Issues and How to Fix Them
Yellowing Leaves
Likely due to lack of sunlight or overwatering. Move to a sunnier spot and reduce watering.
Slowed Growth
May be due to low light or depleted nutrients. Add a grow light or feed with a gentle organic fertilizer.
Foul Smell in Water Regrowth
Change water more frequently and rinse the bulbs. Avoid letting leaves touch the water.
Final Thoughts
Green onions are a must-have for any indoor garden. They’re fast, forgiving, and fabulously flavorful.
Whether you’re growing them in water or soil, you’ll have a fresh supply right in your kitchen in no time. So go ahead—snip, sprinkle, and savor your homegrown scallions!
