Few herbs combine ornamental beauty, rich aroma, and garden resilience like cinnamon basil (Ocimum basilicum ‘Cinnamon’). Interestingly, the term “cinnamon basil” has been used to describe several basil types — sometimes even Thai basil (O. basilicum var. thyrsiflora) — but in this guide, we’re focusing on the distinct cultivar Ocimum basilicum ‘Cinnamon’.
With its warm, spicy scent and visually striking purple stems, it’s one of my favorite cultivars to grow both inside and out. In this comprehensive guide, we’ll explore how to successfully cultivate cinnamon basil using proven horticultural techniques, scientific data, and hands-on tips.
Table of Contents
- What Is Cinnamon Basil?
- Why Choose Cinnamon Basil?
- Growing Requirements for Cinnamon Basil
- How to Start Cinnamon Basil from Seeds (Complete Growing Guide)
- Propagation from Cuttings
- Ongoing Plant Care (Daily + Weekly Routines)
- Managing Pests & Diseases
- Harvesting Cinnamon Basil — Timing + Techniques
- Preserving and Storing Cinnamon Basil
- Advanced Tips: Companion Plants + Varietal Options
- Cinnamon Basil FAQs
- Final Takeaways and Grower Tips
What Is Cinnamon Basil?
Cinnamon basil is a cultivar of Ocimum basilicum distinguished by its narrow, serrated leaves and reddish-purple stems. It contains high levels of methyl cinnamate, the compound that gives it its signature spicy-sweet aroma — making it perfect for teas, chutneys, and savory dishes.
Compared to sweet basil or Thai basil, this variety is especially prized for its ornamental flair and slightly woodsy flavor.
Key Attributes
- Botanical name: Ocimum basilicum ‘Cinnamon’
- Aroma profile: Cinnamon-spice from methyl cinnamate
- Growth habit: Upright, with narrow leaves and purple stems
Why Choose Cinnamon Basil?
Aside from flavor, cinnamon basil offers several garden and wellness benefits:
- Culinary uses: Works well in both sweet and savory recipes
- Health properties: Known for its anti-inflammatory and antioxidant activity (source)
- Pollinator attraction: Loved by bees and butterflies
- Garden design: Aesthetic appeal due to red stems and compact growth
Growing Requirements for Cinnamon Basil
Ideal Temperature & Light
Cinnamon basil thrives in 18–30°C (65–86°F) with a minimum of 6 hours of full sun daily. For indoor growers, aim for a PAR light intensity of 200–400 μmol/m²/s.
According to research, light intensities above 300 μmol/m²/s may trigger stress, so strike a balance between growth speed and photoprotection (source).
Related: Does Basil Need Full Sun?
Soil Preferences
- pH:2–7.0
- Ideal mix: Sandy loam + 20–30% perlite
- Drainage: Excellent — cinnamon basil hates soggy feet
More: Basil Soil Requirements
Pot or Bed Requirements
- Minimum depth: 6–8 inches
- Container type: Terracotta or breathable fabric pots
- Placement: South-facing window, grow tent, or raised bed
Tool Tip: What Size Pot for Indoor Basil?
How to Start Cinnamon Basil from Seeds (Complete Growing Guide)
Grab your seeds and follow these quick steps from this infographic to grow your own fragrant cinnamon basil!
A simple 4-step guide to growing cinnamon basil from seed—perfect for beginners!
Want more details? Keep reading this step-by-step guide for a deeper look at starting cinnamon basil from seed!
Step 1 – Sowing Cinnamon Basil Seeds
- Timing: Start indoors 6 weeks before your last frost date
- Depth: ¼ inch deep
- Germination rate: 80–90% with warm, consistent moisture
Starter Tip: How to Germinate Basil Seeds in Paper Towel
Step 2 – Germination Environment
- Temperature: Keep soil between 21–27°C (70–80°F)
- Humidity: Cover with a humidity dome or clear bag
- Light: Provide indirect light until sprouting, then shift to 12–16 hrs of light daily
Step 3 – Thinning and Transplanting
- Thinning: Wait for the first true leaves (not the round cotyledons), then snip weaker seedlings
- Transplanting: Once seedlings have 2–3 true leaves and roots begin to circle the cell base
Further Reading: How to Grow Basil from Seeds in Soil
Propagation from Cuttings
Want to clone your favorite cinnamon basil? It’s easy:
- Cutting size: 4–6 inches
- Method: Root in clean water, change every 2 days
- Rooting time: 7–10 days
- Transplant: When roots are at least 1 inch long
More Help: How to Grow Basil from Cuttings
Ongoing Plant Care (Daily + Weekly Routines)
Watering
- Young plants: Every 2–3 days
- Mature plants: Every 4–6 days or when top inch of soil is dry
Guide: How Often to Water Basil
Fertilization
Use an organic NPK (5-10-5) every 2–3 weeks. Studies show that using ammonium sulfate instead of ammonium nitrate improves antioxidant and phenolic content, enhancing its nutritional value (source).
Light & Airflow
- Rotate pots to prevent legginess
- Ensure proper airflow indoors with a fan to reduce mildew risk
Managing Pests & Diseases
Common Pests
- Aphids, whiteflies, Japanese beetles
- Treat with neem oil or insecticidal soap
Pest ID: Common Basil Pests
Common Diseases
- Root rot (from overwatering)
- Powdery mildew (from poor airflow)
Solution Guides:
Harvesting Cinnamon Basil — Timing + Techniques
- When to harvest: Before flowering for peak flavor
- How: Snip above a leaf node to encourage branching
- How much: Don’t cut more than 1/3 at a time
Technique Tip: How to Harvest Basil
Preserving and Storing Cinnamon Basil
Freezing
- Chop and freeze in oil or water (ice cube tray method)
- Retains 85%+ of flavor over months
Drying
- Use a dehydrator or hang bundles upside-down in a dark room
Compare Options:
Advanced Tips: Companion Plants + Varietal Options
- Good companions: Chamomile, oregano, chives
- Avoid near: Rue, sage
- Try also: Red Rubin Basil, Lemon Basil
Guide: Companion Plants for Basil
Cinnamon Basil FAQs
Can I cook with cinnamon basil like sweet basil?
Yes! It adds a warm, spicy note — excellent in teas, curries, and even desserts.
Why are the stems purple?
Cinnamon basil naturally produces anthocyanins, giving it a deep reddish hue.
Does cinnamon basil attract bees?
Absolutely. It’s highly attractive to pollinators when allowed to flower.
Final Takeaways and Grower Tips
If you love basil but want something with extra zing — cinnamon basil is for you. Stick to the ideal temp-light zone, prune regularly, and rotate pots for even light. You’ll be rewarded with a robust plant full of spice, color, and character.
New to basil? Start here: Basil 101 – The Ultimate Guide and How to Care for Basil Indoors
I'm George Brown, a passionate gardener and the founder of UrbanLeafy.com. I love helping beginners grow fresh herbs, plants and greenery, whether on a windowsill, in a garden or a tiny balcony. My practical, no-fluff tips have been featured in Homes & Gardens, Livingetc, and Best Life, and are rooted in years of real experience. If you're ready to turn your space into a thriving herb haven, you’re in the right place.
