Thai Holy Basil Red Herb Seeds
Botanical name: Ocimum tenuiflorum
Thai Holy Basil Red is a fragrant, warm-season herb from the Holy Basil or Tulsi group. Also known as Sacred Basil, Tulasi or Red Tulsi, it is valued for its spicy, clove-like flavour, aromatic foliage, purple-red stems and traditional use in Thai cuisine.
This vigorous basil variety is ideal for herb gardens, kitchen gardens, raised beds and containers. It grows quickly in warm conditions and responds well to regular harvesting.
Key Attributes
Authentic Thai HerbTraditionally used in stir-fries, curries, soups and dishes such as pad kra pao. |
Spicy, Aromatic LeavesDistinctive clove-like flavour with peppery, warm basil and light anise notes. |
Purple-Red ColourAttractive purple-red stems and green to purple-tinged foliage add colour to herb gardens. |
Fast GrowingEstablishes quickly in warm conditions and produces well with regular picking. |
Pollinator FriendlyFragrant flower spikes attract bees and other beneficial insects when allowed to bloom. |
Suitable for PotsWell suited to containers, raised beds, balconies, patios and kitchen gardens. |
About Thai Holy Basil Red
Thai Holy Basil Red produces upright, branching plants with strongly aromatic leaves, colourful stems and fragrant flower spikes. The leaves are generally green with varying degrees of purple colouring, while the stems commonly develop distinctive red-purple tones.
The foliage has a stronger and spicier flavour than sweet basil, with warm clove, pepper and light anise notes. Its robust aroma holds up well during cooking, making it particularly suitable for high-heat stir-fries, curries, noodle dishes, soups and savoury broths.
Thai Holy Basil is especially valued in traditional Thai recipes such as pad kra pao. The fresh leaves may also be used in rice dishes, garnishes and aromatic herbal infusions.
Plants grow vigorously during warm weather and respond well to frequent harvesting. Pinching and picking the young shoot tips encourages branching, produces bushier plants and extends the productive leaf-harvesting period.
What Is Tulsi or Sacred Basil?
Tulsi is the traditional name used for Holy Basil or Sacred Basil. The name is commonly applied to aromatic forms of Ocimum tenuiflorum cultivated throughout South and Southeast Asia.
Tulsi may also be written as Tulasi. Different Tulsi varieties can vary in leaf colour, flavour, aroma and growth habit, but they share the characteristic spicy fragrance that distinguishes Holy Basil from common sweet basil.
Thai Holy Basil Red is a particularly pungent culinary form. Its strong peppery and clove-like flavour makes it especially useful in Thai cooking, where the leaves are often added towards the end of cooking to preserve their aroma.
Thai Holy Basil vs Thai Basil
Thai Holy Basil is not the same plant as standard Thai basil. Thai Holy Basil is generally classified as Ocimum tenuiflorum, while Thai basil is commonly classified as Ocimum basilicum var. thyrsiflora.
Thai Holy Basil has a stronger, more peppery and clove-like flavour. Standard Thai basil generally has smoother leaves and a sweeter liquorice or anise flavour.
For traditional pad kra pao, Thai Holy Basil is generally the preferred choice. Standard Thai basil is more commonly used in curries, salads, noodle dishes and fresh garnishes where a sweeter anise-like flavour is wanted.
Thai Holy Basil Red vs Rama Tulsi
Thai Holy Basil Red and Rama Tulsi are both forms of Holy Basil, but they are commonly selected for different uses.
Rama Tulsi is a green-leaved variety with a comparatively mild, clove-like aroma. It is often grown for herbal infusions, aromatic gardens and general home use.
Thai Holy Basil Red has a stronger, pepperier flavour and more pronounced purple-red colouring. It is particularly well suited to Thai stir-fries, curries, soups and savoury dishes.
Why Grow Thai Holy Basil Red?
- Authentic Holy Basil traditionally used in Thai cooking.
- Also known as Tulsi, Sacred Basil, Tulasi and Red Tulsi.
- Distinctive spicy, clove-like and peppery flavour.
- Attractive purple-red stems and colourful foliage.
- Fast-growing herb suited to warm Australian conditions.
- Suitable for garden beds, raised beds and containers.
- Regular harvesting encourages bushy, productive plants.
- Flowers attract bees and other beneficial insects.
Plant Details
| Plant type | Warm-season annual herb |
| Botanical name | Ocimum tenuiflorum |
| Common names | Thai Holy Basil, Red Tulsi, Sacred Basil, Tulasi |
| Growth habit | Upright and branching |
| Plant height | Approximately 40–70 cm |
| Foliage | Aromatic green to purple-tinged leaves with purple-red stems |
| Flavour | Spicy, peppery and clove-like with light anise notes |
| Position | Full sun to light afternoon shade |
| Days to harvest | Approximately 60–80 days |
| Frost tolerance | Frost tender |
Sowing Information
| Sowing method | Raise in seedling trays or direct sow once conditions are warm |
| Sowing depth | Surface sow or cover very lightly, approximately 1–2 mm |
| Germination time | Approximately 7–21 days |
| Germination temperature | 18–25°C |
| Plant spacing | 25–30 cm apart |
| Row spacing | 40–60 cm apart |
| Soil | Fertile, moist and well-drained |
| Water requirements | Keep evenly moist without waterlogging |
When to Sow Thai Holy Basil Red in Australia
| Climate Zone | Suggested Sowing Time | Growing Notes |
|---|---|---|
| Cool | October–January | Start indoors with warmth or sow after frost danger has passed. |
| Temperate | September–February | Sow after soil and daytime temperatures are consistently warm. |
| Subtropical | August–March | Performs well throughout the warm season with regular moisture. |
| Tropical | Year-round | Provide free-draining soil and good airflow during humid weather. |
| Arid | September–March | Water regularly and provide light afternoon shade during extreme heat. |
How to Grow Thai Holy Basil Red
Sow seeds on the surface of moist seed-raising mix and press them gently into place. Cover only very lightly, as Holy Basil seed benefits from exposure to light during germination.
Keep the seed-raising mix consistently moist but not saturated. Use a fine mist or gentle watering method to avoid dislodging the small seeds.
Maintain a temperature of approximately 18–25°C at seed level. In cool and temperate areas, starting seeds indoors or using a heat mat can improve germination. Transplant seedlings after the danger of frost has passed and the weather is consistently warm.
Choose a position that receives at least six hours of direct sunlight each day. In very hot inland climates, light afternoon shade may help reduce heat stress.
Prepare the soil with compost or well-rotted organic matter before planting. The soil should retain adequate moisture while remaining free draining.
Water regularly to maintain tender leaf growth, particularly when plants are grown in pots. Avoid leaving the roots in saturated soil.
Pinch out the central growing tip once plants are established. Continue harvesting just above a leaf node to encourage branching and produce a fuller, bushier plant.
Harvesting Thai Holy Basil
Begin harvesting young leaves and tender shoot tips once the plants are well established. Pick regularly rather than removing a large proportion of the foliage at one time.
For the best flavour and aroma, harvest in the morning after the foliage has dried. Cut stems just above a pair of leaves to encourage new side shoots.
Use the leaves fresh or dry them gently for later use in herbal infusions and seasoning blends.
Remove flower spikes if the main goal is continued leaf production. Alternatively, allow some plants to flower to attract pollinators or produce seed.
Culinary Uses
- Pad kra pao and other Thai stir-fries
- Curries and noodle dishes
- Soups and savoury broths
- Rice dishes and aromatic garnishes
- Herbal infusions
- Fresh kitchen and restaurant herb gardens
Growing Thai Holy Basil Red in Pots
Thai Holy Basil Red grows well in pots, planters and raised beds. Choose a container at least 20–25 cm wide with unrestricted drainage.
Use a premium-quality potting mix and position the container in a warm, sunny location. Container-grown plants may dry out faster than plants grown in the ground, so check the moisture level regularly during warm weather.
Frequent picking and occasional applications of a balanced liquid fertiliser will help maintain vigorous, leafy growth.
Perfect For
- Thai cooking and traditional stir-fries
- Pad kra pao, curries, soups and noodle dishes
- Fresh herb and kitchen gardens
- Raised beds, containers and patio pots
- Warm-season herb production
- Herbal infusions and aromatic garnishes
- Bee-friendly and beneficial-insect plantings
Frequently Asked Questions
Is Thai Holy Basil a type of Tulsi?
Yes. Thai Holy Basil belongs to the Holy Basil or Tulsi group and is generally classified as Ocimum tenuiflorum. Tulsi is also commonly called Sacred Basil or Tulasi.
Is Tulsi the same as Sacred Basil?
Yes. Tulsi, Holy Basil and Sacred Basil are common names associated with Ocimum tenuiflorum. Tulasi is an alternative spelling.
Is Thai Holy Basil the same as Thai basil?
No. Thai Holy Basil is generally Ocimum tenuiflorum, while Thai basil is commonly Ocimum basilicum var. thyrsiflora. Thai Holy Basil has a stronger, spicier and more peppery flavour.
What does Thai Holy Basil Red taste like?
It has a pronounced clove-like aroma with peppery, warm basil and light anise notes.
Is Thai Holy Basil suitable for pad kra pao?
Yes. Thai Holy Basil is traditionally used in pad kra pao and other high-heat Thai stir-fries.
Can Thai Holy Basil Red be grown in pots?
Yes. It performs well in containers when supplied with warmth, direct sunlight, free-draining potting mix and regular water.
Is Thai Holy Basil annual or perennial?
It is usually grown as a warm-season annual in most Australian climates. It may survive for longer in tropical or frost-free subtropical locations.
Why are my Thai Holy Basil seeds not germinating?
Cold conditions, deep sowing and inconsistent moisture are common causes of poor germination. Surface sow the seed, cover very lightly, maintain even moisture and keep the temperature close to 18–25°C.
How should Thai Holy Basil be harvested?
Cut young shoot tips just above a leaf node. This encourages the plant to branch and produce more tender new growth.
Should Thai Holy Basil flowers be removed?
Remove flower spikes if you want to maximise leaf production. Allow some flowers to develop when growing for pollinators or seed collection.
Explore Holy Basil and Tulsi
Compare available varieties in Seedmart’s Holy Basil and Tulsi seed collection.
For detailed sowing, climate, container-growing and harvesting advice, read our Thai Holy Basil growing guide for Australia.