How to Make Herbal Infused Oils
Learn the traditional and modern methods herbalists use to capture the benefits of herbs in nourishing oils.
There's something quietly sacred about watching golden oil slowly draw the color, scent, and goodness out of the herbs you've grown and dried with your own hands. An herbal infused oil is simply a carrier oil — like olive or sweet almond — that has been steeped with botanicals until the oil takes on the plant's beneficial compounds. No fancy chemistry, no expensive equipment. Just herbs, oil, time, and a little patience.
Herbalists have made infused oils for centuries because they are one of the most versatile preparations in the home apothecary. A single jar of calendula oil can become the base for a healing salve, a soothing body oil, a gentle balm for dry skin, or a nourishing addition to your daily care routine. Once you learn this one skill, dozens of other remedies open up to you.
🌿 Common Carrier Oils
Olive oil (the classic workhorse), sweet almond, jojoba, avocado, sunflower, and fractionated coconut (MCT) oil. Each has its own feel, shelf life, and best use — we'll compare them in Section 2.
🌼 Common Herbs for Infusing
Calendula, plantain, lavender, chamomile, rosemary, lemon balm, and chickweed are beloved beginner herbs — gentle, forgiving, and wonderfully useful for the skin.
Why bother making your own? Because you control every ingredient. You know the herbs are clean, the oil is fresh, and nothing unnecessary was added. Homemade infused oils are economical, deeply satisfying, and a beautiful way to bring the garden into your daily life.
Choosing Your Herbs
The single most important decision you'll make — and the one place beginners most often go wrong.
Pros
- Vibrant color and aroma
- Useful for certain herbs like St. John's Wort
- Available straight from the garden
Cons
- High water content invites mold and rancidity
- Shorter shelf life once infused
- Requires careful wilting first
Moisture Concerns
Water is the enemy of a good oil. Even a few drops trapped under the oil can spoil an entire batch. If you use fresh herbs, wilt them 12–24 hours first to release excess moisture.
Pros
- No water means far less risk of spoilage
- Longer, more reliable shelf life
- Available year-round
- Forgiving and consistent for beginners
Cons
- Slightly less vibrant color than fresh
- Quality depends on proper drying
When to Use
Nearly always — especially when you're starting out. Properly dried herbs give you the safest, most dependable infusion every single time.
✿ Why Beginners Should Start With Dried Herbs
Moisture causes spoilage, and spoilage wastes both your herbs and your oil. Dried herbs remove that risk almost entirely. Master your technique with dried botanicals first — once you understand how a good infusion behaves, you can experiment with fresh herbs later.
Choosing Your Carrier Oil
Your carrier oil shapes the feel, scent, shelf life, and purpose of your finished remedy.
| Oil | Benefits | Shelf Life | Best Uses | Skin Feel |
|---|---|---|---|---|
| Olive Oil | Affordable, rich in antioxidants, deeply nourishing — the classic herbalist staple | 1–2 years | Salves, balms, all-purpose infusions | Rich, slightly heavy |
| Avocado Oil | High in vitamins A, D & E; excellent for dry, mature skin | ~1 year | Body oils, dry-skin balms | Rich, cushioning |
| Jojoba Oil | Closely mimics skin's natural sebum; extremely stable | 5+ years | Facial oils, rollers, longer-keeping blends | Silky, fast-absorbing |
| Sweet Almond Oil | Gentle, softening, well-tolerated by most skin | ~1 year | Body oils, massage oils, baby-gentle blends | Light, smooth |
| Sunflower Oil | Light, affordable, high in vitamin E | ~1 year | Lighter salves, everyday body oils | Light, non-greasy |
| Fractionated Coconut (MCT) | Liquid at room temp, odorless, very long-lasting | 2+ years | Roller bottles, perfume oils, blends needing stability | Dry, ultra-light |
🫒 Which Oil Should You Use?
Honestly? The one you love working with. That said, things like how quickly an oil absorbs, its scent, its texture, and even its color can all steer your choice.
If you're just getting started, keep it simple and reach for olive oil or fractionated coconut oil — both keep well, are easy to find, and suit nearly every project from skin care to the kitchen.
The Traditional Solar Infusion
The classic herbalist approach — slow, gentle, and beautifully simple.
Supplies Needed
- Clean glass jar with tight lid
- Dried herbs of choice
- Carrier oil
- Label & pen
- Cheesecloth (for straining later)
Fill your jar
Add dried herbs until the jar is one-half to two-thirds full.
Cover with oil
Pour your carrier oil over the herbs until they're completely submerged.
Release air bubbles
Stir gently with a clean chopstick to coax out trapped air pockets.
Cap tightly
Seal the jar securely to keep moisture and dust out.
Label & date
Note the herb, oil, and the day you started — your future self will thank you.
Let it infuse
Set the jar in a warm, sunny spot for 4–6 weeks.
Shake daily
Give the jar a gentle swirl each day to keep herbs moving through the oil.
Strain
Pour through cheesecloth, squeezing to recover every drop of golden oil.
Bottle & label
Transfer to a clean bottle, label with the date, and store away from light.
✦ Pro Tips
- A south-facing windowsill gives gentle, steady warmth without overheating.
- If you live somewhere cold or cloudy, the warmth of the sun isn't essential — a warm cupboard works too. This method is sometimes simply called a "cold infusion."
- Always keep herbs fully submerged. Any plant material poking above the oil can mold.
- Patience pays off — a longer infusion yields a richer, more potent oil.
The Slow Cooker Method
A faster path to finished oil — ready in hours instead of weeks.
Supplies Needed
- Slow cooker (crock pot)
- Mason jar with lid
- Dried herbs & carrier oil
- Kitchen towel
- Thermometer
Fill your jar
Add dried herbs and oil to a mason jar, just as in the solar method.
Cushion the jar
Fold a towel and place it on the bottom of the slow cooker, then set the jar on top.
Add a water bath
Pour water around the jar until it reaches partway up the sides.
Warm gently
Keep the heat low and steady, aiming for 95–120°F. Use a thermometer to check.
Infuse
Let it warm gently for 6–12 hours, checking the temperature periodically.
Strain & bottle
Strain through cheesecloth and bottle your finished oil.
Advantages
- Ready in hours, not weeks
- Gentle heat draws out compounds quickly
- Great when you need oil for a project soon
Disadvantages
- Requires monitoring to avoid overheating
- Heat can degrade delicate aromatic herbs
- Temperatures vary between slow cookers
⚠ Safety Tips
- Never let the oil exceed 120°F — high heat destroys beneficial compounds and risks frying the herbs.
- Keep the lid loosely on the jar so pressure doesn't build.
- Use the "warm" or lowest setting; many slow cookers run hot even on low.
- Never leave a heated infusion unattended overnight.
The Infuzium Method
Modern precision infusion — consistent results with the touch of a button.
The Infuzium 420 Botanical Extractor is a countertop machine designed specifically for infusing oils with botanicals. Instead of guessing at temperatures or babysitting a slow cooker, you set an exact temperature and time, and the machine handles the rest — gently warming and circulating the oil for an even, reliable extraction.
Why Use Heat for Oil Infusion?
A gentle source of warmth does something patience alone takes weeks to accomplish: it coaxes the herb's beneficial compounds out of the plant and into your oil far more quickly. The warmth softens and opens up the plant material, helping its constituents move into the carrier oil. This is especially helpful for the stubborn stuff — roots, barks, and woody herbs that are slow to give up their goodness on their own.
The key word, though, is gentle. "Heat" here never means hot. Keep your oil within a warm, controlled range and well below the point where high temperatures begin to break down the very properties you're working to capture — which is exactly why a temperature-controlled machine makes this method so dependable.
✓ Temperature Control
Set the exact degree — no overheating, no guesswork.
✓ Consistent Extraction
Even warming and circulation for uniform results every batch.
✓ Faster Infusion
Hours rather than weeks, with reliable potency.
✓ Less Mess
Self-contained, with built-in straining for tidy work.
Recommended Gathered Remedies Settings
Our tested starting points for beautiful infused oils — always using dried herb only.
| Herb | Temperature | Time | Plant Part | Notes |
|---|---|---|---|---|
| Calendula | 105°F | 3–4 hours | Flower | Delicate flower — gentlest heat |
| Lavender | 105°F | 3–4 hours | Flower | Delicate flower — protects aromatic oils |
| Plantain | 110°F | 3–4 hours | Leaf | Soft leaf — steady gentle heat |
| Rosemary | 118°F | 3–4 hours | Aromatic leaf | Sturdy aromatic leaf takes a little more warmth |
| Lemon Balm | 110°F | 3–4 hours | Leaf | Soft leaf — keep it gentle |
| Chickweed | 110°F | 3–4 hours | Aerial parts | Use thoroughly dried herb to avoid moisture |
Herb-to-Oil Ratios
Two simple ways to measure — one by eye, one by weight.
The Folk Method
Measured by eye — the way herbalists have done it for generations.
Fill your jar one-half to two-thirds full with dried herbs, then cover completely with oil. Simple, forgiving, and perfect for beginners.
The Weight Method
Measured precisely — for repeatable, scalable batches.
Examples:
1 oz dried calendula + 5 oz oil
2 oz dried calendula + 10 oz oil
4 oz dried calendula + 20 oz oil
⚖️ Which Should I Use?
Use the folk method when you're learning and want simplicity. Switch to the weight method once you want consistent, repeatable batches — especially if you're making products to share or sell.
How to Strain Herbal Oils
The final step that separates a cloudy oil from a clear, beautiful one.
Cheesecloth
The traditional choice. Layer it double or triple for a finer strain, then gather and squeeze.
Nut Milk Bag
Reusable and sturdy. Its fine weave catches even small particles and squeezes beautifully.
Fine Mesh Strainer
Quick for a first pass. Follow with cheesecloth for the clearest finished oil.
💧 Maximizing Oil Recovery
- Let the oil drip freely first, then gather the cloth and squeeze firmly — the last drops are the richest.
- Warm oil flows more easily than cold, so strain while slightly warm if possible.
- For the clearest oil, strain twice: once through mesh, once through cheesecloth.
- Let strained oil settle a day, then decant off the top, leaving any sediment behind.
Shelf Life & Storage
Treat your finished oil well and it will reward you for many months.
🏺 Best Storage Conditions
Store infused oils in a cool, dark, dry place — a cupboard or pantry away from the stove and sunlight is ideal. Heat and light are what turn good oil rancid, so keep both at bay. Amber or cobalt glass offers the best protection.
🌿 How to Avoid Rancidity
- Always use thoroughly dried herbs — moisture is the leading cause of spoilage.
- Strain out every bit of plant material before long-term storage.
- Choose oils with longer shelf lives (jojoba, MCT) for blends you'll keep a while.
- A few drops of vitamin E oil can help extend shelf life naturally.
⚠ Signs an Oil Has Spoiled
- A sharp, sour, or "crayon-like" rancid smell
- Cloudiness, fuzzy spots, or visible mold
- A bitter or off taste
- When in doubt, throw it out — a spoiled oil isn't safe for the skin.
Amber Bottles
Block light — best for long storage.
Clear Bottles
Show off color — keep in a dark cupboard.
Dropper Bottles
Perfect for facial oils and precise use.
Pump Bottles
Ideal for everyday body oils.
Best Herbs for Beginners
Gentle, forgiving, and wonderfully useful — start your apothecary here.
Calendula
Plantain
Lavender
Rosemary
Chamomile
Lemon Balm
Chickweed
Frequently Asked Questions
Can I use fresh herbs?
Why is there condensation in my jar?
How long do infused oils last?
Can I mix different herbs together?
Can I use powdered herbs?
Can infused oils be used in salves?
What is the strongest infusion method?
What to Make Next
Your infused oil is the doorway to a whole apothecary of remedies.
