New Jersey’s proximity to the Atlantic Ocean moderates temperatures, allowing for slightly earlier lemongrass planting than inland areas. Finding the best time to plant lemon grass in new jersey is key to getting a strong, healthy crop before the first fall frost. This guide walks you through the exact timing, soil prep, and care steps you need for success in the Garden State.
Lemongrass is a tropical plant that loves heat and humidity. It cannot survive freezing temperatures. In New Jersey, you are working with USDA hardiness zones 6a to 7b. This means your growing season is about 160 to 180 days long, depending on your exact location.
Let’s break down the calendar so you know exactly when to put those stalks or starts in the ground.
Best Time To Plant Lemon Grass In New Jersey
The ideal window for planting lemongrass outdoors in New Jersey is from mid-May to early June. This timing ensures the soil has warmed up enough and all danger of frost has passed. The last frost date for most of New Jersey falls between April 15 and May 15. Coastal areas like Atlantic City may see their last frost earlier, while northern regions like Sussex County may wait until late May.
You should wait until nighttime temperatures stay consistently above 50°F (10°C). Lemongrass will sulk or even die if exposed to temperatures below 40°F for more than a few hours.
Why This Timing Works For New Jersey Gardens
Lemongrass needs soil temperatures of at least 60°F to start growing well. In New Jersey, the soil usually reaches this point by late May. If you plant too early, the cold soil will rot the stalks or stunt growth. If you plant too late, you risk a short harvest before the first fall frost, which typically arrives in mid-October for most of the state.
Here is a quick breakdown by region:
- South Jersey (zones 7a-7b): Plant from May 1 to May 15. Coastal influence warms things up faster.
- Central Jersey (zones 6b-7a): Plant from May 15 to May 25. A safe middle ground.
- North Jersey (zones 6a-6b): Plant from May 25 to June 5. Wait for the hills to warm up.
Starting Lemongrass Indoors For A Head Start
If you want to extend your growing season, start lemongrass indoors 6 to 8 weeks before your last frost date. For most of New Jersey, that means starting seeds or rooting stalks indoors in late March or early April.
Here is how to do it:
- Buy fresh lemongrass stalks from a grocery store or garden center. Look for stalks with the base still intact.
- Place the stalks in a glass of water with the base submerged about 1 inch. Change the water every 2 days.
- After 1 to 2 weeks, you will see roots and new green shoots emerge from the top.
- Once roots are about 1 inch long, transplant each stalk into a 4-inch pot filled with potting soil.
- Keep the pots in a sunny window or under grow lights. Water when the top inch of soil feels dry.
- Harden off the plants by setting them outside for a few hours each day for about a week before transplanting.
Soil Preparation For New Jersey Gardens
Lemongrass is not picky about soil, but it does best in rich, well-draining loam. New Jersey has a mix of sandy soils near the coast and heavier clay soils inland. You need to adjust accordingly.
Follow these steps for great soil:
- Choose a spot that gets full sun, at least 6 to 8 hours of direct sunlight per day.
- Test the soil pH. Lemongrass likes a pH between 6.0 and 7.5. Most New Jersey soils fall in this range, but a simple test kit from a garden center will confirm.
- Amend heavy clay soil with compost or aged manure to improve drainage. Add about 2 to 3 inches of organic matter and mix it in to a depth of 8 inches.
- For sandy soil, add compost to help retain moisture and nutrients.
- If you are planting in a container, use a high-quality potting mix with perlite for drainage.
How To Plant Lemongrass Outdoors
Once the soil is ready and the weather is warm, follow these steps for planting:
- Space plants about 2 to 3 feet apart. Lemongrass grows into large clumps, so give them room.
- Dig a hole slightly larger than the root ball of your plant or stalk.
- Place the plant in the hole so the base is level with the soil surface. Do not bury the stalk too deep.
- Backfill the hole with soil and press gently to remove air pockets.
- Water thoroughly after planting. Keep the soil consistently moist for the first few weeks.
Caring For Lemongrass Throughout The Season
Lemongrass is relatively low-maintenance once established. Here is what you need to do from June through October:
Watering
Lemongrass likes consistent moisture. Water deeply once or twice a week, depending on rainfall. In hot, dry spells, you may need to water every other day. Mulch around the base with straw or shredded leaves to retain moisture and keep the roots cool.
Fertilizing
Feed your lemongrass every 4 to 6 weeks during the growing season. Use a balanced fertilizer like 10-10-10 or a nitrogen-rich organic option like fish emulsion. Apply according to package directions. Too much nitrogen can make the stalks soft and less flavorful, so don’t overdo it.
Pruning And Harvesting
You can start harvesting lemongrass once the stalks are about 12 to 18 inches tall and at least half an inch thick at the base. Cut the stalks at ground level using sharp pruners. Take only what you need, leaving at least half the stalks on the plant to keep it growing.
In late summer, you may notice the plant sending up flower stalks. Cut these off to redirect energy back into the edible stalks. The flowers are not useful for cooking anyway.
Dealing With Pests And Problems
Lemongrass is generally pest-resistant in New Jersey. The strong citronella scent repels many insects. However, you might encounter a few issues:
- Spider mites: These tiny pests appear in hot, dry weather. Spray the plant with a strong jet of water to knock them off. Repeat every few days.
- Rust fungus: Look for orange or yellow spots on leaves. Remove affected leaves and improve air circulation by spacing plants properly.
- Root rot: This happens if the soil stays too wet. Make sure your soil drains well and do not overwater.
Preparing For Fall And Winter
Lemongrass is a perennial in tropical climates, but in New Jersey, it will not survive the winter outdoors. You have two options: harvest everything before the first frost, or bring plants indoors to overwinter.
Option 1: Harvest Before Frost
Plan to harvest all remaining stalks by mid-October, before the first hard frost. Cut the stalks at ground level, remove the tough outer leaves, and store them in the refrigerator for up to 2 weeks. You can also freeze or dry the stalks for longer storage.
Option 2: Overwinter Indoors
If you want to keep your lemongrass plants for next year, dig up a few clumps before the first frost. Trim the stalks back to about 6 inches tall. Plant each clump in a pot with fresh potting soil. Place the pots in a sunny window or under grow lights indoors. Water sparingly through the winter, only when the soil feels dry. In spring, you can replant them outdoors after the last frost.
Common Mistakes New Jersey Gardeners Make
Here are a few pitfalls to avoid:
- Planting too early: Even if the air feels warm, the soil may still be cold. Check soil temperature with a thermometer before planting.
- Overwatering: Lemongrass likes moisture but not soggy roots. Let the top inch of soil dry out between waterings.
- Ignoring frost dates: A surprise late frost in May can kill young plants. Keep row covers or frost cloth handy just in case.
- Planting in shade: Lemongrass needs full sun to grow thick stalks. Partial shade will result in thin, weak growth.
Frequently Asked Questions
Can I plant lemongrass in New Jersey in August?
It is possible but not recommended. Planting in August gives the plant only 6 to 8 weeks of warm weather before the first frost. The stalks will likely be small and not worth the effort. Stick to spring planting for best results.
What is the latest time to plant lemongrass in New Jersey?
The latest safe planting date is around July 1. After that, the plant may not have enough time to mature before fall. If you plant in July, choose a fast-growing variety and keep the plant well-watered during summer heat.
Should I use seeds or stalks for planting lemongrass?
Stalks are much easier and faster. Seeds can be tricky to germinate and take longer to grow. Most gardeners in New Jersey start with grocery store stalks or transplants from a nursery.
Does lemongrass come back every year in New Jersey?
No, not outdoors. Lemongrass is not winter-hardy in New Jersey. It will die if left in the ground over winter. You must either harvest it all or bring it indoors as a potted plant to keep it alive until spring.
How much space does lemongrass need in a New Jersey garden?
Each plant can grow into a clump 2 to 3 feet wide and 4 to 5 feet tall. Give them plenty of room to spread. If you are short on space, grow lemongrass in a large container, which also makes it easier to move indoors for winter.
Final Tips For Success
Lemongrass is a rewarding plant for New Jersey gardens. It adds a tropical look to your landscape and provides fresh flavor for teas, soups, and stir-fries. The key is timing. Wait for warm soil, give the plant plenty of sun and water, and plan ahead for winter.
If you follow the mid-May to early June planting window, you will have a bountiful harvest by late summer. Keep an eye on the weather forecast in spring and be ready to cover your plants if a late frost threatens. With a little care, your lemongrass will thrive in the Garden State.
Remember that each growing season is slightly different. Some years, spring comes early and you can plant by May 1. Other years, a cold snap lingers into June. Use a soil thermometer and watch local frost dates for your specific town. This is the most reliable way to determine the best time to plant lemon grass in new jersey for your exact location.
Happy gardening. Your lemongrass will thank you for the patience and care.