5 Fast-Rooting Vegetables You Can Regrow From Kitchen Scraps

Reducing food waste and grocery costs by easily regrowing vegetables at home.

5 Fast-Rooting Vegetables You Can Regrow From Kitchen Scraps

The fastest vegetables to regrow from kitchen scraps are green onions, celery, romaine lettuce, bok choy, and garlic greens. These root or resprout from intact stem bases, bulbs, or cloves in water, usually showing visible growth within 2–7 days. They are best used for small, repeat harvests of leaves, stems, or shoots, not for replacing full vegetable production. The main value is reducing waste and getting extra fresh garnish from food you already bought, often from scraps that cost $0 extra after the original purchase.

Green onions are the easiest kitchen-scrap vegetable to regrow. Keep the white bulb end with roots attached, leaving about 2–5 cm of the pale stem above the roots.

Place the roots in a small glass with about 1–2 cm of water, enough to cover the root zone, not the full stem. Change the water every 1–2 days to reduce odor and bacterial buildup. A room temperature spot around 18–24°C works well.

New green shoots usually appear quickly, often within 2–4 days, because the plant is regrowing from an existing bulb and root system. Cut the greens when they reach about 10–15 cm tall, leaving the lower white base intact for another cycle. A typical garnish serving is 1–2 tablespoons chopped greens per bowl or plate.

Best for: fast garnish, small kitchens, windowsills, low-cost regrowth, soups, noodles, eggs, salads. Not suitable for: producing large onion bulbs, long-term indoor growing without soil, containers with stagnant water.

Practical value: one store-bought bunch can often give 2–4 cuttings of green tops before vigor declines. Moving the rooted bases into potting mix extends the useful life compared with water alone, especially if watered lightly every 2–3 days or whenever the top 1–2 cm of soil feels dry.

Celery can regrow leafy shoots from the base of the stalk cluster. Cut off the bunch, leaving the bottom 4–6 cm intact, and place the base cut-side up in a shallow dish with about 1 cm of water.

Keep only the bottom portion in water. The central leaves may begin to grow from the crown within 4–7 days, while the outer stalks soften or discolor. Replace the water every 1–2 days and rinse the dish if it feels slimy.

After roots and fresh leaves appear, usually after 7–14 days, transplant the base into moist potting mix with the crown above the soil surface. Celery prefers steady moisture and bright light, about 6 hours of indirect light if possible, but it does not tolerate sitting in foul water.

Best for: celery leaves, small seasoning harvests, stock, soups, sauces, indoor starter projects. Not suitable for: reliably regrowing full supermarket-sized celery stalks indoors, dry windowsills, dark rooms.

Practical value: regrown celery is usually better treated as a herb-like leaf crop. The leaves have strong flavor and are useful in cooked dishes; even 1–2 tablespoons chopped leaves can season a pot of soup, reducing the need to buy a full bunch for small amounts.

Romaine lettuce can resprout from the heart if the base is kept intact. Cut the leaves above the core, leaving roughly 3–5 cm of the stem base.

Set the base in a shallow dish with 1–2 cm of water touching the bottom, not submerging the entire crown. Replace the water every 1–2 days and keep it in bright indirect light for about 4–6 hours daily.

New leaves often emerge from the center within 3–6 days. These leaves are typically small and tender; the regrown plant usually will not form a full dense head like field-grown lettuce. Harvest small leaves when they are about 5–10 cm long.

Best for: small salad additions, sandwich leaves, quick indoor experiments, using leftover lettuce cores. Not suitable for: full lettuce-head production, hot sunny windows that cause wilting, mold-prone containers.

The Result