06/05/2026
One of the biggest reasons tissue-cultured plants fail is not contamination.
It’s poor acclimation.
Inside culture vessels, plantlets grow in an environment with constant humidity, low airflow, stable temperatures, and very little environmental stress.
Once removed from that environment, they suddenly have to regulate water loss, adapt to airflow, and survive outside sterile conditions.
And that transition can shock the plant if done too quickly.
This is why acclimation should always be gradual.
Simple adjustments can dramatically improve survival rates:
â—† Slowly reducing humidity instead of removing covers immediately
â—† Using ventilated humidity domes for a smoother environmental transition
â—† Choosing airy substrates that improve oxygen access to roots
â—† Increasing airflow slowly to strengthen stomatal function
◆ Maintaining stable temperatures between 22–28°C
â—† Properly removing leftover agar from roots before transplanting
â—† Avoiding overwatering during the early stages
Many newly deflasked plantlets still have delicate roots and poor transpiration control. Excess moisture, sudden airflow, or environmental fluctuations can quickly lead to wilting, fungal issues, or root rot.
And honestly, even perfectly healthy cultures inside the vessel can struggle if the hardening process is rushed.
Acclimation is not just the final step of tissue culture.
It’s the stage that determines whether those plantlets successfully transition from in vitro conditions into strong greenhouse-ready plants.
The stronger the acclimation process, the stronger the plants become long-term.
Have any acclimation questions for us? Let us know in the comments, and we will help you with them right away.
