Basil is one of the most popular herbs in the kitchen and the garden, and one of the first I plant every spring. Starting basil seeds indoors four to six weeks before your last frost gives you a head start on the season, but the seedlings have to be moved to bigger pots or to the garden at the right moment, and in the right way. Transplanting basil seedlings is easy once you know the steps, and with good care you will be picking fresh basil leaves all summer long.
In this guide you'll learn when to transplant basil seedlings, how to move them without shock, how to harden them off, and how to care for them afterward.
Last updated: October 2026. This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases, at no extra cost to you.
Quick answer: Transplant basil seedlings when they have their second set of true leaves. Water them an hour beforehand, move each one into its own pot with drainage holes at the same depth, and keep them out of direct sun for a few days. Harden them off for about 7 days before planting outdoors after the last frost.
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Why Start Basil Seedlings Indoors?
Basil is a warm-season herb that does not tolerate frost, so starting seeds indoors lets you begin early and plant out when the weather is safe. Seedlings you raise yourself also cost far less than nursery plants, and you can choose varieties such as Genovese, Thai, or purple basil. If you are starting from scratch, see my guide on how to grow basil from seeds first.
When to Transplant Basil Seedlings
Your basil seedlings are ready to transplant when they have developed their second set of true leaves. The first leaves to appear are the rounded seed leaves (cotyledons), and the true leaves, which look like small basil leaves, come next. Transplant only the biggest, healthiest seedlings, because they will grow into the strongest plants. Plant one seedling per container: it grows faster and doesn't have to compete with its neighbors for light, water, and nutrients.
To move seedlings outdoors, wait until the last frost has passed and nights stay above about 50°F (10°C). Cold weather stunts basil and can blacken the leaves.
What You Need to Transplant Basil
- Containers with drainage holes: about 3 to 4 inches (8 to 10 cm) wide for the first move, or larger pots for final growing
- Quality potting mix: a light, well-draining potting soil
- A small spoon or dibber to lift seedlings gently with their roots
- A watering can with a gentle rose or a spray bottle
- Labels if you are growing more than one variety
How to Transplant Basil Seedlings Step by Step
- Water the seedlings first. About an hour before transplanting, water them well. This makes it easy to pull them out with a fair bit of compost clinging to their roots.
- Fill the new containers. Use pots with drainage holes and quality potting soil, and make a small hole in the center of each.
- Lift the seedling gently. Hold it by a leaf, not the stem, and loosen it from the tray with a spoon so the roots stay intact.
- Plant it at the right depth. Set it in the hole and don't bury it any deeper than it was in its original pot.
- Firm the soil. Gently tamp the soil around the plant to remove air pockets.
- Water thoroughly. Water until it drains from the bottom, so the roots settle in.
- Let it recover. Keep the containers out of direct sunlight for a few days so the transplants recover from the move.
Caring for Newly Transplanted Basil Seedlings
Take care not to overwater your basil seedlings. Keep the soil lightly moist, never soggy, and always give the seedlings good air circulation and ventilation so the tops stay dry and standing moisture is kept to a minimum. Once the plants settle in, move them into bright light: a sunny window, or a grow light a few inches above the leaves for 12 or more hours a day, keeps seedlings short and sturdy instead of tall and weak.
How to Harden Off Basil Seedlings
To give your basil the best chance of success, harden it off before leaving it outside full time. Hardening off means gradually getting your plants used to outdoor temperatures, sunlight, and wind, and it makes the move to the garden much easier. Start about 7 days before planting. Here is a simple schedule:
- Days 1 and 2: put the seedlings in a sheltered, shady spot for 1 to 2 hours.
- Days 3 and 4: give them a few hours of gentle morning sun, and leave them out a little longer.
- Days 5 and 6: leave them outside most of the day, with more direct sun.
- Day 7: keep them out all day, and bring them in at night if it is cool. Then plant them.
Bring them in if the temperature falls below about 50°F (10°C) or if strong wind or heavy rain is forecast.
Transplanting Basil Into the Garden or a Large Pot
After hardening off, choose a sunny spot with 6 to 8 hours of direct light and well-drained soil enriched with compost. Space plants about 10 to 12 inches (25 to 30 cm) apart so air can circulate. Dig a hole slightly larger than the root ball, set the plant at the same depth as in its pot, firm the soil, and water well. Transplant on a cloudy day or in the late afternoon to reduce stress. If you grow in containers instead, use a pot at least 8 to 12 inches (20 to 30 cm) wide per plant. Once your plants are growing, learn how to harvest basil so they keep producing, and consider planting peppers nearby, as I explain in my guide to basil and pepper companion planting.
Common Basil Transplanting Problems
- Wilting after transplanting: this is normal transplant shock. Keep the plant out of direct sun for a few days and water gently.
- Yellow leaves: usually overwatering or poor drainage. Let the top of the soil dry slightly and check the drainage holes.
- Tall, thin seedlings: not enough light. Move them to a brighter window or under a grow light.
- Dark or blackened leaves: cold damage. Keep basil indoors until nights stay above about 50°F (10°C).
- Seedlings collapsing at the base: a fungal problem often called damping off, caused by wet soil and poor airflow. Water less and improve ventilation.
Transplanting Basil Seedlings FAQs
When should I transplant basil seedlings?
When they have developed their second set of true leaves. Move them outdoors only after the last frost, when nights stay above about 50°F (10°C).
How long should I wait before transplanting basil outside?
Harden the seedlings off for about 7 days before planting them in the garden.
Should I plant one or several basil seedlings per pot?
One per pot is best for the first move. It grows faster because it doesn't compete with its neighbors.
How deep should I plant basil seedlings?
At the same depth they were growing in their original pots. Burying them deeper can rot the stem.
How far apart should basil plants be in the garden?
About 10 to 12 inches (25 to 30 cm) apart, so air can circulate and the plants stay healthy.
Why is my basil wilting after transplanting?
It is probably transplant shock. Keep it out of direct sun for a few days, water gently, and it should recover.
Can I transplant basil in summer?
Yes, as long as the plants are hardened off. Transplant in the evening or on a cloudy day, and water well.
What size pot should I use for basil?
Use 3 to 4 inch (8 to 10 cm) pots for the first move, then a pot at least 8 to 12 inches (20 to 30 cm) wide for final growing.
Seeds and Gardening Supplies I Recommend
Explore these useful seeds, supplies, and books for starting and transplanting basil.
Affiliate links below. As an Amazon Associate I earn from qualifying purchases.
Heirloom purple basil seeds for starting seedlings in pots indoors, ready to transplant when the weather warms.
A starter kit with Italian basil, Genovese basil, and lemon balm seeds, listed as non-GMO heirloom seeds for indoor or outdoor herb gardens.
Two classic basils to start as seedlings: Genovese for pasta and pesto, and Thai basil for stir-fries.
Sharp snips are handy for thinning crowded seedlings at the soil line and for the first harvest later on.
Breathable gloves for potting up seedlings and working in the garden bed.
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An all-in-one guide to growing vegetables and herbs, with advice on seed starting, pest control, and gardening through the seasons.
🛒 Browse Basil Seeds on Amazon 🛒
Final Thoughts
Because this fragrant garden favorite is so easy to grow in the right conditions, you'll be grateful for the time you spend on your basil seedlings. Move them at the right time, harden them off, give them light and air, and you'll enjoy the flavor and aroma of fresh, homegrown organic basil. Happy gardening!
Watch: How to Transplant Basil Seedlings
See the steps from this guide in action, from watering and lifting the seedlings to potting them up.
Prefer YouTube? Watch it there.
More Basil Guides
- How to Grow Basil
- How to Grow Basil From Seeds
- How to Harvest Basil
- How to Collect Basil Seeds
- Basil and Peppers Companion Planting
- Basil Seeds (Sabja): Benefits, Side Effects & How to Use Them
- History of Basil
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