Neem oil comes from the seeds of the Neem tree (Azadirachta indica) — a resilient tree native to the Indian subcontinent that grows across tropical and semi-tropical regions. The leaves, bark and seeds of the tree all have uses, but it's the seeds that yield the highest concentration of oil and the compounds that make neem useful for plant care.
Here's how it goes from tree to bottle.
From fruit to seed
The process starts with ripe neem fruits, which are harvested and left to dry naturally. Once dry, the outer layer of the fruit is removed to reveal the seed inside. Each seed contains a kernel — the dense, oil-rich part that gets processed into neem oil.
The kernels are then crushed and pressed to release the oil. What happens next depends on the extraction method — and that's where quality differences start to emerge.
Cold-pressed vs. solvent extraction
There are two main ways to extract oil from neem kernels, and the method matters.
Cold pressing — the method we use — extracts oil without heat. The kernels are mechanically pressed and the oil is released and collected. Because no heat is involved, more of the naturally occurring compounds in the seed are preserved through the process. The resulting oil is golden-yellow, rich in naturally occurring compounds, and has a strong, distinctive earthy smell — sulphurous, pungent, unmistakable. If your neem smells strongly, that's a good sign.
Solvent extraction uses solvents to draw oil from the kernels. It can produce a higher yield, which makes it more efficient at scale, but the final quality depends heavily on the process. Some solvent-extracted or highly refined neem oils may be lighter in colour, milder in smell and lower in the naturally occurring compounds people usually associate with neem.
Cold-pressed neem is generally considered the higher-quality option for plant foliage care, which is why it's what we use.
What's in neem oil
Neem oil contains a complex mix of naturally occurring compounds. The best-known is Azadirachtin — a compound that appears across much of the neem research and is often used as one marker of formulation quality. But neem oil contains a broader range of compounds beyond Azadirachtin, including fatty acids, triglycerides and sulphur-containing compounds that contribute to its distinctive smell and properties.
After extraction, the oil goes through a filtration process to remove remaining solids, leaving a clear amber liquid ready for use.
Pure neem vs. our formula
Pure, unformulated neem oil needs to be mixed with water and a wetting agent before use. Without a wetting agent, oil and water won't combine properly and the neem won't adhere evenly to leaf surfaces.
Once mixed with water, the naturally occurring compounds in pure neem begin to break down — which is why we recommend mixing only what you need for a single session and discarding the rest.
Our Neem Oil is different. We blend cold-pressed neem with a plant-based wetting agent and a plant-based oil that helps stabilise the naturally occurring compounds in the bottle. That gives our formula an 18-month shelf life from bottling — no mixing required, no timing pressure, ready to use whenever you need it
What we use neem oil for
At The Plant Runner, neem is a foliage care product. We use it for leaf shine, dust removal and general leaf health — and that's the lane it belongs in.
Applied to leaves, neem lifts dust and grime, restores the natural lustre of foliage and leaves a light layer that helps slow dust building up again. It doesn't leave a heavy residue on the leaf surface, so the plant continues to photosynthesise and transpire normally. Clean leaves absorb light more efficiently — and light is what drives everything else.
It's suitable for use around the home when used as directed. As with any plant care spray, avoid ingestion, don't spray near faces, and let foliage dry before pets or kids get curious. We don't register or promote our neem as a pesticide or fungicide — it's a foliage care product, and that's where it works best.
How to use it
Shake well before use. Spray directly onto foliage and wipe with a soft cloth — the Love Leaf Gloves work well for this. Work leaf by leaf rather than drenching the whole plant.
Don't apply in direct sunlight or when the plant is getting direct sun — apply in the evening or when the foliage is in shade. Repeat every 2–4 weeks as part of your regular leaf care routine.
Avoid applying to pubescent (hairy) leaves — the texture traps the oil and can cause buildup.
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