---
title: How to grow Basil from Seed
description: Learn how to grow basil from seed with this step-by-step guide. Discover ideal conditions, common issues, and tips for a bountiful harvest.
---

[How to Garden! ](https://www.theonlinegardencenter.com/how-to-garden)

# [How to grow Basil from Seed](https://www.theonlinegardencenter.com/how-to-garden/how-to-grow-basil-from-seed)

 Written by [Mark Foley](https://www.theonlinegardencenter.com/how-to-garden/author/mark-foley) | 3/23/26 11:55 AM

## How to grow Basil from seed

Basil is one of the easiest and most rewarding herbs to grow from seed. With warmth, light, and regular harvesting, you can produce a steady supply of fresh leaves throughout the growing season.

Starting from seed gives you stronger plants and a wider choice of varieties.

## Quick answer: How to grow basil from seed

To grow basil from seed, sow seeds on the surface of moist compost, keep them warm (around 20–25°C), and place in a bright location. Keep soil lightly moist and transplant seedlings as they grow.

## Step-by-step guide to growing basil from seed

Step 1: Choose containers and compost

- Use small pots or seed trays with drainage
- Fill with **fine seed compost**
- Lightly firm the surface

Step 2: Sow the seeds

- Scatter seeds thinly across the surface
- Basil seeds need **light to germinate**, so do not bury deeply
- Lightly press into the compost

Step 3: Provide warmth

- Keep at **20–25°C for germination**
- Use a propagator or warm windowsill
- Consistent warmth is important

Step 4: Water and provide light

- Mist or water gently
- Keep compost **consistently moist, not wet**
- Place in a **bright position** once seedlings appear

Step 5: Thin and transplant

- Thin out crowded seedlings
- Pot on once plants have a few true leaves
- Space plants to allow airflow

## When to sow basil seeds

Basil is typically started:

- In **spring indoors**
- Once consistent warmth can be maintained
- Not suitable for cold conditions

It grows quickly but needs warmth at all stages.

## Best basil varieties

- Sweet basil (Genovese) 
    - Classic flavour
    - Ideal for cooking
- Thai basil 
    - Slightly spicy flavour
    - Great for Asian dishes
- Purple basil 
    - Decorative leaves
    - Mild flavour
- Lemon basil 
    - Citrus scent
    - Fresh and light

Choose based on **flavour and use in the kitchen**.

## Ideal growing conditions

- Temperature 
    - Warm conditions are essential (20–25°C early on)
- Light 
    - Bright light or full sun
- Soil 
    - Light, well-draining compost
- Water 
    - Keep evenly moist
    - Avoid waterlogging

## Common problems

Poor germination

- Cause: low temperatures
- Fix: increase warmth

Leggy seedlings

- Cause: insufficient light
- Fix: move to a brighter position

Yellowing leaves

- Cause: overwatering or poor drainage
- Fix: adjust watering

Slow growth

- Cause: cold conditions
- Fix: keep plants warm

## Climate and regional notes

UK & Ireland

- Best grown indoors or in warm conditions
- Outdoor growing only in summer

Europe

- Northern regions require indoor start
- Southern regions can grow more easily outdoors

USA

- Grow after frost risk has passed
- Thrives in warm climates

## Pro tips for better results

- Pinch out tips regularly to encourage bushy growth
- Harvest often to prevent flowering
- Avoid letting soil dry out completely
- Grow in pots for easy access
- Keep plants warm at all times

## FAQs: growing basil from seed

**When should I sow basil seeds**  
In spring, once you can provide consistent warmth.

**Do basil seeds need light to germinate**  
Yes, they should be sown on the surface and not buried deeply.

**How long does basil take to germinate**  
Usually 5–10 days in warm conditions.

**Can I grow basil indoors year-round**  
Yes, with enough warmth and light.

**Why is my basil leggy**  
Usually due to lack of light.

**How often should I water basil**  
Keep soil consistently moist but not waterlogged.

**When should I harvest basil**  
Once plants are established, harvest regularly to encourage growth.

**Can basil grow in pots**  
Yes, it grows very well in containers.

**Why is my basil flowering**  
Usually due to stress or lack of regular harvesting.

**How long does basil last**  
It can grow for several months with proper care.

[View full post](https://www.theonlinegardencenter.com/how-to-garden/how-to-grow-basil-from-seed)

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