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In Episode 20 of the GroShow Podcast, host Riley Jones welcomes Grodan Crop Specialist Jon Jirikovec for a deep dive into one of the most important (and often underestimated) parts of a successful grow: initial substrate saturation and rooting strategy. From troubleshooting dry-back issues to dialing in daily irrigations, Jon shares the foundational practices that help cultivators get the most from their Grodan blocks and slabs. 

What if inconsistent rooting or poor substrate hydration are limiting your yields without you even realizing it? Jon breaks down proper saturation techniques that create uniform water distribution, why early irrigation decisions shape root structure, and how to avoid common mistakes like using low EC or skipping QC checks on block weights. 

We also explore how to maintain capillarity during the rooting-in phase, why sensors should be placed strategically, and how overly wet or dry conditions can throw off nutrient balance in the root zone. Jon outlines a multiphase irrigation approach—refreshment, drain, and dry-back—that sets growers up for long-term consistency, crop steering, and improved plant health. 

If you're building out a facility or looking to refine your early-stage irrigation protocols, this episode offers clear, actionable guidance grounded in real-world experience—and shows why so many top growers trust Grodan stone wool to set the foundation for success.