Tissue Culture Acclimation Guide
Share
Tissue culture plantlets have spent their entire lives in a sterile, high-humidity environment. Acclimation is the process of slowly introducing your new plantlet to life outside of that environment.
It may seem a little intimidating at first, but the biggest thing to remember is don’t rush it. Slow changes, consistency, and a little patience will give your plantlet the best chance at success.
This guide walks you through the process using our Plants Unlimited Tissue Culture Acclimation Kit, from opening your tissue culture all the way to graduating it into a regular houseplant.
Don’t have our acclimation kit?
That’s okay! The same basic process can be adapted to other setups. You may need to make a few adjustments depending on your container, substrate, and watering method. For substrate, we recommend Fluval Stratum mixed with perlite or sphagnum moss during initial acclimation rather than putting a fresh plantlet directly into regular potting soil.
Before You Open the Bag
First things first: you don’t have to rush!
Your tissue culture doesn’t need to be opened and potted the moment you bring it home. If the bag is still properly sealed and everything looks good, your plantlet can generally stay in its tissue culture environment for a little while—often a week or two—before you begin acclimation.
If you need to wait, keep your tissue culture somewhere warm with bright, indirect light. Don’t leave it tucked away in a shipping box, dark cabinet, or anywhere it could get too hot or cold.
Use that extra time to gather your supplies, read through this guide, and get everything ready. Once you open the bag, that’s when the acclimation process begins.
Ready To Get Started?
Having everything ready before you open your tissue culture will make the process much easier.
Your Acclimation Kit Includes
- Clear nursery pot with wick
- Outer cup/reservoir
- Adjustable humidity dome
- Pre-measured Fluval Stratum + perlite substrate
You’ll Also Need
- Your tissue culture plantlet
- Two small bowls
- Water
- 3% hydrogen peroxide
- Clean scissors or snips, if needed
- Optional: your preferred fertilizer
Once you have everything together, you’re ready to get started!
Part One: Potting Up Your Tissue Culture
Step 1 — Prepare Your Water Baths
Fill two small bowls with water.
Add 1 tablespoon of 3% hydrogen peroxide per 1 cup of water to each bowl.
The first bowl will be used to clean your plantlet. The second will be a fresh bath for your clean plantlet to rest in while you prepare its new home.
Step 2 — Remove & Clean
Carefully remove your plantlet from its bag or container.
Using the first water bath, gently remove as much of the gel, or agar, from the roots as possible.
Take your time! Tissue culture roots can be delicate, so there's no need to scrub or pull aggressively.
While you're cleaning, remove any dead or yellowing tissue. Clean scissors or snips can be used if needed.
Step 3 — Let It Rest
Once your plantlet is clean, place it into your second prepared water bath.
Let it hang out there for a moment while you prepare its new pot.
Step 4 — Pot It Up
When potting your plantlet, we want to leave as much growing room as possible between the plant and the top of the humidity dome. The more room we leave, the longer your plantlet can grow before it reaches the top of its enclosure.
Start by adding a small amount of the provided substrate to the bottom of the clear nursery pot—just enough to cover the drainage holes.
Remove your plantlet from its water bath and gently position it in the nursery pot.
Add just enough substrate to cover the roots and support the plantlet.
That's it! You don't need to fill the nursery pot to the top. It's completely normal to have substrate left over. Save the extra—you can always add more later as your plant grows and becomes established.
Set Up the Reservoir
Place the nursery pot into the clear outer cup.
Add a small amount of water to the bottom of the outer cup, making sure that only the wick is touching the water. The bottom of the nursery pot itself should remain above the water line.
The wick will draw moisture from the reservoir up into the substrate.
You can also add a light dose of fertilizer to the reservoir water if you'd like. Keep it gentle—your plantlet is still young and adjusting to its new environment.
Step 5 — Add the Humidity Dome
Carefully place the humidity dome over your newly potted plantlet.
Make sure none of the leaves are being pinched between the dome and the cup, and make sure the adjustable vent on top is completely closed.
Now find a good home for your new plantlet.
Aim for:
Bright, indirect light
Warm temperatures around 70–80°F
No harsh direct sunlight
You may notice condensation forming on the inside of the dome. That's normal! It's a good indication that your little plant is staying warm and humid.
And now for the hard part...
Part Two: Acclimation
Step 6 — Leave It Alone!
Or, as we like to say:
Patience and procrastination are key.
Your plantlet has spent its entire life in extremely high humidity. The goal is not to rush things. We want to slowly and gradually introduce it to its new environment.
For the first couple of weeks, leave it alone.
Keep the humidity dome on and the vent completely closed. Give your plantlet time to adjust, establish its roots, and begin growing in its new environment.
Sometimes doing less really is better.
Step 7 — Slowly Lower the Humidity
After your plantlet has had a couple of weeks to settle in, it's time to begin introducing a little more airflow.
Start by opening the vent on top of the humidity dome. This will drop the humidity just a little bit.
Then leave it alone again!
Give your plantlet about another week to adjust to the lower humidity.
After that, you can begin removing the dome for a few minutes each day.
Start small. As the days go on, gradually increase the amount of time your plant spends without its dome.
A few minutes becomes a little longer. Then a little longer.
Eventually, your plant should be able to remain outside of its humidity dome comfortably.
Watch Your Plant
If your plantlet begins to wilt or looks stressed when the dome is removed, don't panic and don't push it.
That's simply its way of telling you it isn't ready yet.
Put the dome back on, give it more time at higher humidity, and try again later.
There is no prize for acclimating the fastest!
Every plantlet is different. Let yours set the pace.
Step 8 — Graduate Your Plant!
Once your plantlet can comfortably remain outside of its humidity dome, congratulations!
You've successfully acclimated your tissue culture.
Continue caring for it as a young plant while it develops a stronger root system and puts out new growth.
You can continue using the self-watering setup while your plant grows. Keep an eye on the reservoir and make sure the nursery pot itself isn't sitting directly in water.
Once your plant has become established and outgrown its nursery pot, you can repot it as you normally would using the appropriate potting mix for that particular species.
Your Acclimation Timeline at a Glance
Weeks 1–2: Keep the humidity dome on with the vent completely closed. Leave your plantlet alone and let it settle in.
Around Week 3: Open the vent on top of the humidity dome to begin introducing more airflow.
Around Week 4: Begin removing the dome for a few minutes each day.
Going Forward: Gradually increase the amount of time your plantlet spends without its dome.
Graduation Day: Once your plant remains happy without the humidity dome, you can leave it off!
Remember: this is a guideline, not a deadline.
Different plants may acclimate at different speeds. Species, temperature, humidity, growing conditions, and the individual plantlet can all affect how quickly it adjusts.
Watch your plant—not the calendar.
How Do I Know It's Working?
One of the best signs that your tissue culture is settling in is healthy new growth.
Keep its environment warm, bright, humid, and consistent while it adjusts. Try not to make several changes at once, and don't be discouraged if your plant needs a little extra time at one stage of the process.
Your tiny tissue culture is learning how to be a houseplant!
Questions? We're Here to Help.
Tissue culture can feel a little intimidating the first time, but you don't have to figure everything out alone.
If something doesn't look right, your plantlet is struggling, or you're simply unsure what to do next, don't hesitate to reach out to us!
We want you and your plant to thrive