How to Replant Lemongrass: Root Revival Tricks for Year-Round Growth

Replanting lemongrass isn't just about saving a struggling plant—it's about unlocking year-round harvests of fragrant stalks that make your kitchen smell like summer. 🌿 I've replanted dozens of clumps, and the difference between a thriving plant and a sad one comes down to three things: when you replant, how you handle the roots, and the exact conditions lemongrass craves once it's back in the ground.

The best time to replant is during warm, humid weather—think late spring or early summer—when temperatures stay above 60°F and roots can establish quickly.

You'll need a sharp knife or clean scissors, a pot at least 12 inches deep, and a mix of potting soil and perlite to keep those roots from sitting in soggy soil. Lemongrass hates wet feet, so drainage is non-negotiable.

After replanting, you'll notice new shoots in 2-3 weeks if everything's right—the soil stays moist but not waterlogged, the plant gets 6+ hours of sunlight daily, and you avoid overcrowding.

The first harvest comes in 8-10 weeks, and with proper care, your lemongrass will keep growing for years, sending up fresh stalks every few months.

This method works for both potted lemongrass and in-ground replanting, whether you're dealing with a single stalk or dividing a clump. The key is patience—lemongrass doesn't bounce back overnight, but it will reward you with bold, citrusy flavor that store-bought can't match.

What you need

Step-by-Step instructions for replanting lemongrass

Reviving lemongrass from cuttings or established clumps is easier than you think—here’s how to keep it thriving.

Select 3-4 inch long stems with 3-4 nodes (the little bumps where roots and leaves grow). These nodes are your secret weapon—they’re where new roots will sprout. Trim the stem just below a node with clean scissors, making a clean cut to avoid damaging the plant. Avoid stems that are yellow, mushy, or hollow—they won’t root well.

Here’s the thing—lemongrass roots best in warm water. Fill a glass with room-temperature water (about 70-75°F) and submerge the cut end of the stem, leaving the top 1-2 inches above water. Place it in a bright, indirect light spot—no direct sun yet. Change the water every 2-3 days to prevent bacterial growth. You’ll see tiny white roots emerging from the nodes in about 10-14 days.

Lemongrass hates soggy roots, so choose a pot with drainage holes and at least 6 inches of depth. A terracotta pot works best because it breathes and prevents root rot. Fill the bottom 1 inch with small gravel or perlite to improve drainage. Then, use a well-draining potting mix—avoid garden soil, which compacts and suffocates roots.

Here’s what I do: mix equal parts potting soil and perlite (or coconut coir) for extra aeration. The goal is a light, fluffy texture that holds moisture but drains fast. Tap the pot gently to settle the mix, then create a small hole in the center with your finger—this is where the rooted stem will go. Moisten the soil until it’s damp but not dripping.

Once your lemongrass stem has 1-2 inches of roots, it’s ready for replanting. Gently place the stem into the hole, ensuring the lowest node is just below the soil surface. Press lightly around the base to secure it, but don’t pack the soil too tightly—lemongrass roots need air to grow. Water lightly to settle the soil, then let it drain completely.

Place the pot in a warm, bright spot with indirect sunlight for the first week. Direct sun can scorch the new leaves while roots adjust. Water only when the top inch of soil feels dry—overwatering is the #1 killer of replanted lemongrass. You’ll know it’s taking root when new leaves emerge from the top in about 2-3 weeks.

After 3-4 weeks, when the plant shows strong new growth, gradually introduce it to morning sun for a few hours daily. Lemongrass loves full sun (6+ hours) but can scorch if moved too quickly. Over 7-10 days, increase sun exposure until it’s getting direct sunlight all day.

Once established, water 1-2 times per week, letting the soil dry out between waterings. Feed with a balanced liquid fertilizer (10-10-10) every 4-6 weeks during growing season. You’ll know it’s happy when the stems are sturdy, leaves are glossy, and new shoots appear at the base. That’s your cue to start harvesting!

Tips & tricks for perfect lemongrass revival

Reviving lemongrass from cuttings is all about patience and precision—here's how to maximize success with every step.

Rooting Secret: The water temperature of 70-75°F is non-negotiable for root development. I've found that using a thermometer to verify the water temp eliminates guesswork. If your kitchen feels chilly, place the glass near a sunny window or use warm tap water (never hot). The goal is to mimic tropical growing conditions right in your home.

Node Placement Matters: When planting your rooted stem in Step 3, I can't stress enough how critical the node position is. The lowest node should be just barely covered—this is where the magic happens. If you bury it too deep, the stem may rot; too shallow and it won't root properly. Think of it like planting a toothpick: just enough to anchor without smothering.

Light Transition Strategy: The gradual sun exposure in Step 4 is where many replanted lemongrass fail. Start with just 1-2 hours of morning sun for the first week, then increase by 30 minutes each subsequent week. This hardens the new growth and prevents sunburn. I've seen plants that looked healthy in indirect light suddenly wilt when moved to full sun too quickly.

Soil Moisture Test: The "top inch dry" rule in Step 3 is perfect, but here's how to check properly: Stick your finger about an inch deep—if it feels dry at that depth, water lightly. If it's still damp, wait another day. Overwatering is the silent killer of replanted lemongrass, and this simple test prevents it every time.

Frequently asked questions

Got questions about replanting lemongrass? You’re not alone! Here are some of the most common concerns—plus straightforward answers to help you keep your plants thriving.

When is the best time to replant lemongrass?

Replant during the early spring or late summer when temperatures are mild (60–80°F). Avoid extreme heat or frost, as lemongrass is tropical. If replanting in containers, do it anytime—just ensure the new pot has drainage holes!

Can I replant lemongrass from a grocery store bunch?

Yes! The roots of store-bought lemongrass are often still viable. Trim the stems to 6 inches, soak the roots in water for 1–2 hours, and replant in well-draining soil. Water lightly and keep it in partial shade for a week to reduce stress.

How do I know if my replanted lemongrass is dying?

Watch for yellowing leaves (overwatering), brown, crispy tips (underwatering or sunburn), or mushy stems (root rot). Adjust care: move to shade if scorched, water only when the top inch of soil is dry, and ensure pots aren’t soggy.

Should I replant lemongrass in soil or water?

Soil is best for long-term growth! Lemongrass thrives in moist, well-draining soil (like a mix of potting soil and perlite). If you prefer hydroponics, use a shallow water container with 1–2 inches of water—just change it weekly to prevent algae.

How often should I fertilize replanted lemongrass?

Wait 4–6 weeks after replanting, then use a balanced liquid fertilizer (like 10-10-10) every 4–6 weeks during growing season. Over-fertilizing can burn roots—always dilute to half-strength if unsure!

Can I replant lemongrass from cuttings?

Snip a 6-inch stem with healthy roots, remove lower leaves, and place it in water or moist soil. Keep it in bright, indirect light and change the water every 2–3 days. Roots should sprout in 2–4 weeks!

Still stumped? Drop your question in the comments—we’re happy to help your lemongrass bounce back!

Wrapping up and next steps

Replanting lemongrass is easier than you think—and with these root revival tricks, you’ll keep your plant thriving year-round! 🌱 Whether you’re dividing clumps, refreshing cuttings, or troubleshooting weak roots, patience and the right care will pay off in lush, fragrant growth.

Now that you’re armed with the know-how, why not expand your container garden?

Your next step? Try replanting a few more herbs or experiment with companion plants like mint or basil to create a vibrant, low-maintenance kitchen garden. Happy replanting—your future meals (and aromatherapy sessions!) will thank you. 😊