From Lab to Land: The Journey of Our Spring Deliveries
Spring marks one of the busiest and most rewarding times at In Vitro S.L.—the culmination of months of precise laboratory work, greenhouse care, and logistical coordination. Each year, hundreds of thousands of Paulownia Clone InVitro 112® plants leave our facilities to reach clients across Europe and beyond.
Precision in Propagation
Every batch we ship has been produced under our strict in vitro micropropagation protocol, ensuring perfect genetic identity, sanitary, and traceability guarantees. Each plant passes through controlled growth phases: laboratory, acclimatization, and hardening.
Only after meeting our internal quality parameters—root density, uniformity, and vigor—do the plants enter the delivery queue.
Packaging with Purpose
Before shipment, plants are inspected and packed with the utmost care to maintain their humidity and health throughout transit. Our specialized packaging protects the roots and shoots while allowing for aeration.
We offer two formats to adapt to the client’s needs:
- 🌱 Paulownia clon invitro 112® Ready-to-Plant (ready to plant immediately upon receipt)
- 🪴Paulownia clon invitro 112® 60-cell Alveolus (can be planted directly under certain conditions or transplanted in bigger pot and housed in greenhouse before planting for 1-2 months in warm weather)
Global Coordination
Shipments are organized according to each country’s optimal planting calendar. For most of Europe—Germany, France, Poland, and the Netherlands—spring offers ideal temperature conditions.
By coordinating production cycles with planting windows, we guarantee that our partners receive trees in their best physiological state, synchronized with local climates.
Commitment Beyond Delivery
Our service does not end once the truck departs. We are at the disposition of each client to provide him with technical assistance to ensure the success of his plantations and the completion of their cultivation objectives.
This dedication has made In Vitro S.L. a trusted partner in agroforestry, biomass, and carbon-offset projects worldwide.
As we complete this year’s deliveries, we’re already propagating the next generation for autumn and spring planting seasons. The cycle never stops—it evolves with every new partnership and plantation.
How a plantlet becomes a field-ready tree
Every spring delivery is the end of a journey that starts months earlier in the laboratory. The process has four distinct stages. First, multiplication: shoots are propagated in vitro on nutrient media under sterile conditions. Second, rooting: selected shoots develop their own root system, still inside the culture vessel. Third, acclimatization: the young plants move to our greenhouses, where humidity, light and temperature are stepped down gradually so the plantlet learns to regulate its own water balance — the most delicate phase of the whole cycle. Finally, hardening and logistics: trees are graded, packed in trays and scheduled for transport so they arrive at the plantation in the narrow window when soil temperature and moisture give them the best possible start.
Why acclimatization matters so much
A plant raised in vitro has never faced dry air, direct sun or a real pathogen. Moving it outdoors without a controlled transition is the single biggest cause of losses in micropropagated crops. We have refined our acclimatization protocol over thousands of batches — you can read the detail in our guide to preventing ex-vitro losses. It is also why we deliver trees, not promises: what our clients plant, survives. See how the deliveries perform in the field on our plantation page, or explore the Paulownia Clon InVitro 112® that most of our spring shipments consist of.