OASIS® Wedge® Season Is Here!
May 30, 2025

Another poinsettia propagation season (aka OASIS® Wedge® season) is well underway here at Oasis Grower Solutions.

Poinsettia propagators worldwide are prepped to receive their unrooted cuttings and start sticking the 2025 crop of the world’s favorite holiday potted plant.

This year, like every year for decades, the overwhelming majority of the millions of poinsettias grown will get their start in OASIS® Wedge® propagation media, from mother stock for poinsettia cutting production to finished plants. It’s no coincidence that’s true year after year.

Whenever poinsettia propagation season approaches, our team fields quite a few questions about how OASIS® Wedge® can make your life easier and improve your results. Sharing knowledge and helping you grow is paramount to us, so we’re answering a few common Wedge® questions here.

Q: Why do you call OASIS® Wedge® The Poinsettia Propagator’s Dream Substrate?

A: We didn’t come up with that name ourselves — poinsettia propagators did — but we’re happy to claim it as our own. OASIS® Wedge® is an excellent substrate for many types of challenging plants, but our team was focused on poinsettia propagation when Wedge® was born. The development of this substrate was fueled by input from the world’s leading poinsettia breeders and propagators. It’s the only engineered propagation substrate that can say that.

From cleanliness and superior cutting hydration to the wedge shape that drives fast, consistent and uniform root development and growth, OASIS® Wedge® and poinsettia URCs were literally made for each other. It’s no surprise that more poinsettia breeders and propagators worldwide use OASIS® Wedge® than any other substrate.

Q: Why should I use OASIS® Wedge® instead of peat-based media?

A: If you propagate poinsettias, you know how crucial hydration is during the critical period of root initiation. You also know larger foliage and high evapotranspiration rates of poinsettia URCs can make hydration challenging. Excessive misting sets off a chain of additional problems, from nutrient leaching and pathogen growth to extra labor costs.

While OASIS® Wedge® has many benefits over peat-based mixes, matric potential is a major differentiator — and an inherent problem with peat. Compared to Wedge® engineered media, peat has a much higher matric potential. That means that peat holds water more tightly and restricts the water availability, even when the substrate is saturated. Cuttings try to pull water, the peat fights back, and a tug-of-war ensues.

In contrast, Wedge® keeps water readily available, so your cuttings don’t have to fight for a drink. Instead of wilting, excessive misting and overwatering with peat, you get superior cutting hydration with Wedge.® (For more background, see our research on poinsettia cutting hydration in Wedge® versus peat-lite soilless mix.)

Q: How does OASIS® Wedge® help reduce pest and disease pressure?

A: When Wedge® ships to your propagation operation, it leaves our facility clean and free of pathogens and pests — including fungus gnat larvae and other surprises often found in peat mixes and other substrates. When you combine cleanliness with a substrate that balances water availability and proper drainage, you’re ahead of pest and disease pressures from the start, even with problematic or disease-prone plants.

Overwatering is the most common mistake propagators make with poinsettia cuttings. Used properly, Wedge® eliminates the risk of overwatering. That also eliminates the waterlogged root zone conditions that poinsettias hate — and bacterial pathogens love. Rather than creating a rooting environment that favors pathogens, Wedge® does the opposite to minimize disease pressures, from meltdown to Pythium and Erwinia.

Q: So how can OASIS® Wedge® make my life easier?

A: Besides the reasons above, OASIS® Wedge® saves you time, labor and mess. This substrate comes preloaded in trays or strips, ready to go on demand. No delays to fill trays or wait for equipment repairs. With Wedge®, the variability and inconsistency of loose fill trays is a thing of the past. You can trust every batch will be the same.

Our versatile OASIS® Wedge® Strips make it easy to review the propagation bed at callus formation, and simplify spacing, handling and moving throughout propagation. You can optimize flexibility in scheduling and make more efficient use of bench space and your staff. Our Wedge® Strip Carrier Trays make it easy to hold the strips on any surface during propagation (and shipping) to streamline the process and make your life even easier.

With robust, uniform root formation of OASIS® Wedge®, your cuttings can be ready for extraction when cuttings in peat-based substrates are still days away. And when transplant time comes, for you or your liner customers, you can count on Wedge® for no transplant shock or delay. (You can find the research and best practices for optimal transplant quality on our site as well.)

To answer your next question, yes, there’s still time to get OASIS® Wedge® this year. You can learn firsthand why the world’s leading poinsettia breeders and propagators rely on Wedge®. Reach out to your Territory Sales Manager or contact us at [email protected] or +1 (855) 585-4769.

Keep those questions coming. We're Oasis Grower Solutions. We have the answers you need.

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