Scrap gardening is the practice of regrowing vegetables, herbs, and sometimes fruits from kitchen scraps—like stems, roots, and seeds—that would otherwise be thrown away or composted. It’s sustainable, fun, and a great way to reduce waste while growing free food at home.
🥬 Vegetables You Can Regrow from Scraps
🌱 Easy-to-Regrow Veggies:
- Green onions (scallions)
- Scrap: White root end with 1–2 inches of stem
- How: Place in a glass of water, root-side down; change water every 2–3 days
- Time to regrow: A week or less
- Tip: Once grown a few inches, transplant to soil for better growth
- Lettuce (romaine, butterhead)
- Scrap: Bottom 1–2 inches of the head
- How: Place cut base in a shallow dish with water, stem side down
- Time to regrow: New leaves in 3–5 days
- Tip: Mist daily; transplant to soil after a week for full heads
- Celery
- Scrap: Bottom root end
- How: Place in a shallow dish of water, cut side up
- Time to regrow: 5–7 days for leaves, longer for stalks
- Tip: Transfer to soil for full regrowth
- Garlic
- Scrap: Single clove
- How: Plant in soil, pointy end up, about 2 inches deep
- Time to regrow: Several months for a bulb
- Tip: Use garlic greens like chives while waiting for the bulb
- Ginger
- Scrap: Fresh rhizome with visible buds or eyes
- How: Plant just under soil surface in a pot with good drainage
- Time to regrow: Sprouts in a few weeks; harvest after 6–10 months
- Tip: Keep warm and moist; great for containers
- Potatoes / Sweet Potatoes
- Scrap: Eye sprouting pieces (cut chunks with 1–2 eyes)
- How: Let dry overnight, then plant in soil
- Time to regrow: A few months for full-sized tubers
- Tip: Hill up soil as the plant grows
- Onions
- Scrap: Bottom root end
- How: Place in shallow water or plant directly in soil
- Time to regrow: Green tops in days, bulbs in weeks
- Tip: Great in containers with deep soil
🌿 Other Things You Can Regrow
- Carrot tops (not roots): Grow feathery greens for garnishing or pesto
- Beet tops: Regrow greens from the root crown
- Basil, mint, cilantro: Regrow from cuttings in water
- Leeks and fennel: Like scallions—regrow in water from the root end
- Pineapple tops: Can be rooted and grown into new plants (fruiting takes 2–3 years)
🛠️ Best Practices for Scrap Gardening
1. Start in Water, Move to Soil
- Most scraps grow roots faster in water, but soil supports long-term growth
- Use clear containers to monitor roots (e.g., jars or glasses)
2. Change Water Frequently
- Every 1–3 days to avoid rot and promote healthy roots
3. Provide Sunlight
- Place on a sunny windowsill (4–6 hours of light daily)
- For faster, fuller growth, use a grow light if needed
4. Use Well-Draining Soil
- Once transplanted, ensure soil doesn’t stay soggy
5. Be Patient
- Some scraps grow quickly (green onions), others take weeks or months (potatoes, ginger)
- Keep a scrap garden journal
- You will have this for future scraps with important notes about how these tidbits grew and what you have observed
- This can also be helpful to other people, whether in handwritten form or posting this online
- There are apps for this now that are free to use
6. Watch for Mold or Rot
- Discard mushy or smelly scraps.
- If you don’t stay on top of this you may encounter sour flies, which can get out of control quickly
- Keep humidity moderate and containers clean
- Empty water often and refill with clean cool water every few days to avoid mold, disease or pests
🌟 Tips for Success
Stager the plants growth so you can have an endless supply of fresh veggies
Label your containers so you remember what’s growing
Group scraps with similar needs (light, water, temp)
This is where a journal will come in handy
You can look this information up initially, then you will have it written down and it is easy to find later
Use organic veggies when possible—they sprout more reliably
There are some GMO varieties of plants that have no viable seeds
These were created to prevent propagation
Don’t overwater once in soil. Too much moisture causes root rot
You will need to check the water daily or every other day
Push your fingertip into the soil about an inch or up to your first knuckle
If it is moist wait another day or two; if it is dry, then you can add some water
Grow what you actually use—helps you stay motivated and reduces waste
Select plants that you will want to eat or even ones you can sell or give away