- 0% Prostaglandin
- Vegan
- Cruelty-free
- Free shipping over $50
- 90-night guarantee
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Who it's for
For lashes that have been through something.
Almost nobody starts a lash serum because things are going well. They start because of extensions, or glue, or a year that took it out of them.
After extensions
The gap between sets is when the lash line gets to recover. This is the step for that gap.
After falsies and glue
Nightly conditioning for lashes that have taken a lot of adhesive and a lot of pulling.
Fine, fair or straight
Lashes that are pale or fine enough that mascara alone never quite does it.
Coming back from a thin patch
After a stressful stretch, a pregnancy, or a season where they thinned out and did not bounce back.
Most people don't notice it in the mirror first.Someone else asks.
Progress
The same eye, nine weeks apart.
No filter, no mascara, no clever lighting between the frames. One eye, one camera, four dates.
Week 1
The baseline. Taken before the first application.
Week 3
Conditioning. Nothing dramatic yet, and that is expected.
Week 6
The lash line starts to look denser.
Week 9
Fuller through the middle and out to the tips.
What to expect
What actually happens.
A lash grows on its own cycle and nothing shortens it. Here is the honest schedule, including the part where nothing happens.
Nothing visible yet.
This part is conditioning. It is also where most people quit.
Fewer lashes on the pad.
The lash line starts to look denser.
Lashes look fuller.
This is usually when someone else says something first.
Full result.
Compare it to your week one photo.
The guarantee
Ninety nights.
Use it every night for ninety nights. If you are not happy, we refund you in full and you keep the tube.
Ninety nights is longer than the twelve weeks the result takes, and that is deliberate. A guarantee that expires before the product can work is not a guarantee.
The formula
Five things, doing five jobs.
Short lists are easier to defend. Every one of these is a cosmetic ingredient you could look up in ten seconds.
Rosemary Leaf Oil
Botanical conditioning for the lash and the skin it grows from.
Biotin
The familiar one from hair care. In here for conditioning, not for a claim we cannot back.
Panthenol
Softens the lash and helps it break less on the way up.
Hyaluronic Acid
Holds water at the lash line, where the skin is thinnest.
Arginine
A conditioning amino acid. Nothing exotic, and nothing borrowed.
Full ingredient list is in the What's inside panel on this page, always. No proprietary blends, no undisclosed actives, and nothing on the list we will not explain.
The ingredient question
Why ours takes longer.
The serums that work in four weeks mostly use a prostaglandin analogue — a chemical relative of glaucoma eye drops. They are genuinely faster. They also act on the tissue around the eye, not only on the lash. We left the whole class out and took the extra six weeks.
Prostaglandin analogues
- Bind receptors in the follicle and in the tissue around it
- Extend the growth phase pharmacologically
- Also act on pigment and fat cells, which is where iris darkening and eyelid hollowing come from
- Visible in four to six weeks
- Under EU safety review since February 2026
Rosela Nightly
- Conditions the lash and the delicate skin of the lash line
- Works on the lash you already grow, on its own cycle
- No prostaglandin analogue, so nothing acting on pigment or fat cells
- Visible in ten to twelve weeks
- A cosmetic, start to finish
None of these are in it
- isopropyl cloprostenate
- bimatoprost
- DDDE
- MDN
- added hormones
- parabens
- silicones
“cannot be considered safe for cosmetic applications intended to promote lash and brow growth”
EU Scientific Committee on Consumer Safety, Opinion SCCS/O_302, adopted 2 February 2026, on isopropyl cloprostenate, DDDE and MDN.
We are slower. That is the entire point.
How it compares
Four ways to get fuller-looking lashes.
| Rosela Nightly | Prostaglandin serums | Extensions | Mascara | |
|---|---|---|---|---|
| Works on your own lashes | Yes | Yes | No | No |
| Time to full result | 12 weeks | 4–6 weeks | Same day | Same day |
| Cost per month | ~$16 | $25–50 | $80–200 | $10 |
| Time per day | 10 sec | 10 sec | Salon visit | 2 min |
| Risk of iris colour change | None | Documented | — | — |
| Safe with contacts | Yes | Varies | Varies | Yes |
| Money-back guarantee | 90 nights | Varies | No | No |
Swipe the table to see every column.
Reviews
What people say.
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Questions
Everything people ask.
When will I see a difference?
Most people notice their lash line looks denser somewhere in weeks four to six, and see the full result at weeks ten to twelve. Nothing visible happens in the first three weeks. That is the lash cycle, not the serum.
Why twelve weeks when other serums say four?
Because the four-week serums are mostly using a prostaglandin analogue, and we are not. That ingredient class works by acting on the follicle and the tissue around it, which is also how it produces iris darkening and eyelid hollowing. Conditioning the lash you already have is slower. We think it is the trade worth making, and we made the guarantee long enough that you can find out without risking anything.
Does it contain prostaglandins?
No. Not isopropyl cloprostenate, not bimatoprost, not DDDE or MDN, and no added hormones. The whole class is out, not just the famous one.
Is there castor oil in it?
There is hydrogenated castor oil, which is a solubiliser — it is what lets the rosemary oil mix into a water base. It is not the castor oil people talk about online, and we are not going to market it as though it were. For what it is worth, no clinical trial has ever tested castor oil for lash growth, and neat castor oil is heavy enough at the lid margin to be a plausible cause of styes and dry eye. We would rather leave that claim to someone else.
Can I use it with lash extensions?
Yes. Apply to the lash line and let it dry fully before bed. It is oil-light, so it will not break down most adhesives, but check with your tech if you are mid-set.
What about a lash lift or tint?
Fine with both. Wait 48 hours after a lift or tint before starting, then use it nightly as normal.
I wear contact lenses.
It goes on the lash line rather than in the eye, so lenses are fine. Let it dry before putting them back in if you prefer.
Will it change my eye colour?
No. Iris darkening is associated with prostaglandin analogues, which are prescription drug ingredients. There are none in this formula.
Can I wear mascara over it?
Yes. It is a night step, so most people apply it after taking makeup off. If you use it in the morning, let it dry before mascara.
Does it work on brows?
Same formula, same routine. One stroke along the brow, brush through.
How long does one tube last, and why buy more than one?
About two months of nightly use. The full result lands at ten to twelve weeks, so a single tube will not get you all the way there. Two tubes cover the whole run at 20% off. Three tubes take a third off and work out to the lowest price per tube, with a spare for keeping the result once it lands.
What happens if I stop?
Lashes gradually return to how they were as the cycle turns over. It is a conditioning routine, not a permanent change.
Is it tested on animals?
No. Vegan and cruelty-free.
I have sensitive eyes.
The formula is free of parabens, silicones and denatured alcohol. It does contain rosemary leaf oil, which is a botanical and therefore the most likely thing to bother a reactive eye — patch test first if you react easily, and stop if you get irritation.
Pregnant or breastfeeding?
Check with your doctor before starting any new product. We do not make recommendations either way.
How does the guarantee work?
Use it every night for ninety nights. If you are not happy, email us and we refund you in full. You keep the tube; there is nothing to ship back.
Where do you ship?
United States, United Kingdom, Canada, Australia and most of the EU, priced in your local currency at checkout.
Ten seconds a night, for ninety nights.
Ready when you are
Ninety nights, or your money back.
Free shipping over $50. One tube is about two months, and the full result lands at weeks ten to twelve.