Regrow lemon grass from stalk in soil 60 day

Why This Method Works

There's something incredibly satisfying about transforming kitchen scraps into thriving plants, and learning to regrow lemon grass from a stalk in soil is one of my favorite urban gardening hacks. It’s not just about saving money; it’s about participating in the cycle of life right in your own home. Lemon grass, botanically known as Cymbopogon citratus, is a perennial grass native to tropical and subtropical regions. Its vigorous growth habit is actually what makes this regrowing method so successful. Unlike some herbs that propagate best from seed or root division, lemon grass has a remarkable ability to regenerate directly from its base.

The science behind it is fairly straightforward: the white, bulbous base of a lemon grass stalk contains meristematic tissue – undifferentiated cells capable of developing into new roots and shoots. When exposed to the right conditions (primarily moisture and light), these cells activate, drawing energy from the sugars stored within the stalk to initiate new growth. Once those initial roots form, the plant can then anchor itself and begin absorbing nutrients from the soil, essentially starting a whole new life for minimal effort. This process is called vegetative propagation, and it’s why many culinary herbs, from green onions to celery, can be coaxed back to life from their trimmings.

For us urban gardeners, especially those of us living in apartments, this method is a game-changer. It requires very little space, a simple pot, and offers a continuous supply of fresh lemon grass for teas, curries, and stir-fries. Plus, it bypasses the need for seeds, which can sometimes be finicky or difficult to source for specific varieties.

What You'll Need

Getting started with regrowing lemon grass is refreshingly simple. Most of what you need you probably already have around your home. Here’s a detailed list:

• Lemon Grass Stalks: This is key! Look for fresh, firm stalks with a healthy, light-colored base. Avoid any that are dry, brownish, or mushy. I usually buy a bunch from my local Asian market; they tend to have the freshest options. You'll want at least 2-3 stalk sections to increase your chances of success.
• Container (for initial rooting): I've found that a small glass or jar works perfectly for the first few days. It allows you to monitor root development, which is quite satisfying to watch.
• Pot (for planting): For a single lemon grass plant, a 6-8 inch diameter pot with drainage holes is ideal. If you plan to grow multiple stalks together, opt for a 10-12 inch pot. Lemon grass eventually grows into a clump, so give it room. Plastic, terracotta, or ceramic pots all work, but if using terracotta, remember it dries out faster.
• Growing Medium: A good quality, well-draining potting mix is crucial. I always look for mixes that contain perlite or vermiculite to ensure aeration and prevent waterlogging. Avoid dense garden soil, as it compacts easily in pots. If you're unsure how much soil you'll need for your chosen pot, check out our soil volume calculator for precise measurements! It’s a handy tool I use constantly.
• Water: Tap water is generally fine, but if your tap water is heavily chlorinated, letting it sit out for 24 hours can help the chlorine dissipate.
• Sharp Knife or Scissors: For any necessary trimming.

Step-by-Step Guide

Days 1-3: Setup

1. Prepare the Stalks: If your lemon grass stalks come with dried outer layers or super long green tops, trim them. I usually cut off the very top green leaves, leaving about 6-8 inches of stalk. Focus on the bottom 3-4 inches – you want a clean, firm base.
2. Water Immersion: Place the prepared stalks, cut end down, into a glass or jar filled with about 1-2 inches of water. Make sure only the very bottom of the stalk is submerged; too much water can lead to rot.
3. Light & Location: Place the glass in a bright spot, but out of direct, intense sunlight initially. A north-facing window or a spot that gets indirect light for most of the day is perfect.
4. Daily Water Change: This is critical! Change the water daily to prevent bacterial growth and oxygenate the water. In my experience, neglecting this step is the fastest way to get moldy, rotting stalks.

Days 4-7: Initial Growth & Observation

By now, if your stalks are healthy, you should start seeing tiny nubs of roots emerging from the base. You might also notice some new green growth appearing from the center of the stalk.

• Continue changing the water daily.
• Ensure the stalks remain upright. If they're leaning, you might need a slightly taller glass or to add some pebbles to stabilize them.

Days 8-14: Root Development & Shoot Emergence

The roots should be more prominent now, perhaps a quarter to half an inch long. New green shoots will also be visibly growing from the center.

• Keep up with the daily water changes.
• Once roots are about 1 inch long, your lemon grass is ready for planting. Don't let the roots get too long and tangled in the water; it can stress the plant when it's moved.

Days 15-20: Planting Time

This is where your stalks transition from water to soil!

1. Prepare the Pot: Fill your chosen pot with the well-draining potting mix, leaving about an inch from the rim.
2. Planting: Make a small depression in the center of the soil. Gently place one rooted stalk into the depression and backfill with soil, making sure to cover the root structure and the bottom inch or two of the stalk. If planting multiple stalks, space them a few inches apart.
3. Water Thoroughly: Water gently but thoroughly until water drains from the bottom of the pot. This helps settle the soil around the roots.
4. Location Adjustment: Place the potted lemon grass in a warm, sunny location. Lemon grass loves full sun, so if you have a south-facing window, that's ideal.

Days 21-30: Establishing in Soil

The plant is now adjusting to its new home. Growth might slow down slightly as it focuses on establishing a stronger root system.

• Watering: Water when the top inch of soil feels dry to the touch. Lemon grass likes consistent moisture but absolutely hates sitting in soggy soil, which leads to root rot.
• Observation: Watch for new shoots emerging from the soil around the original stalk. This indicates successful rooting and new growth.
• Troubleshooting: If leaves start to yellow, it could be overwatering (most common) or underwatering. Feel the soil.

Days 31-45: Vigorous Growth

By now, your lemon grass should be actively growing, sending up new blades frequently. It will start to form a clumping habit.

• Fertilizing (Optional): If you want to boost growth, a diluted liquid all-purpose fertilizer (half strength, every 2-4 weeks) can be beneficial. I usually wait until about the 6-week mark before I consider fertilizing.
• Sunlight: Ensure it's still getting plenty of light. Rotate the pot occasionally for even growth.

Days 46-60: Harvesting & Maintenance

Your lemon grass should be a robust clump now, probably 10-12 inches tall or more, and ready for its first harvest!

• Harvesting: When individual stalks are about 1/2 inch thick at the base and 12-18 inches tall, they are ready. Harvest by pulling an outer stalk from the base, or cutting it close to the soil line with a sharp knife. This encourages more growth.
• Continued Care: Maintain consistent watering. During warmer months, you might need to water every other day. Less frequently in cooler months.
• Pest Watch: Indoor plants can sometimes get spider mites or mealybugs. Inspect your plants regularly. A quick spray with insecticidal soap usually takes care of most issues.

Common Mistakes to Avoid

1. Not Changing Water Daily (Initial Rooting Phase): This is the number one killer of rooting lemon grass stalks. Stagnant water quickly becomes a breeding ground for bacteria and fungi, leading to rot before roots even have a chance to form.
2. Planting Before Sufficient Root Development: Patience is key. If you put the stalk in soil too soon, before it has established a good root system (at least 1 inch long), it will struggle to absorb water and nutrients, often leading to failure.
3. Overwatering in Soil: Lemon grass roots need oxygen. Constantly soggy soil suffocates the roots and promotes root rot, which is often difficult to recover from. Always check the soil moisture before watering.
4. Insufficient Light: Lemon grass is a sun-loving plant. While it can tolerate some partial shade, it won't thrive or produce robust stalks without at least 6 hours of bright, direct light daily once planted in soil. Weak light leads to leggy, pale growth.

Pro Tips for Maximum Success

1. Warmth & Humidity: Lemon grass loves warmth. If your apartment runs on the cooler side, consider placing the rooting jar or pot on top of a refrigerator or near a gentle heating vent (not directly on it, which can dry it out). A humidity tray (pebbles in a saucer with water, not touching the pot base) can also provide a small humidity boost.
2. The "Heel" Matters: When buying stalks, try to get ones with a bit of the root "heel" still attached – that slightly wider, often purplish base. This part is packed with growth hormones and makes rooting even faster and more reliable.
3. Group Planting for Bushiness: Instead of planting just one stalk per pot, I often plant 2-3 stalks together in a single 8-inch pot (or 4-5 in a 10-12 inch pot). This encourages a fuller, bushier plant more quickly, yielding more harvestable stalks. If you're unsure about appropriate spacing for multiple plants, our plant spacing calculator can help you figure out the best arrangement.
4. Consider Bottom Heat: For an extra boost during the rooting phase, especially in cooler climates, a seedling heat mat can work wonders. It keeps the water temperature consistently warm, mimicking tropical conditions and accelerating root development.

There you have it! In just about 60 days, you can go from a humble kitchen scrap to a productive lemon grass plant, ready to enhance your culinary adventures. It’s an incredibly rewarding journey, perfect for even the smallest urban space. Don't hesitate – grab some stalks next time you're at the market and start your own regrowing experiment today!

And remember, for any precise measurements or planning your indoor garden layout, don't forget to check out our free calculators at MicroGardenHacks!