Cardboard, Hemp & Sawdust: Unconventional Microgreens Media Trial

Hydroponics Daily · Oct 10, 2025 · 4m · transcript

Dr. Russell Sharp tests unconventional, nutrient-free grow media for microgreens—hemp and microgreens matting, cardboard and coarse sawdust—comparing results for chia and onion in a hydroponic setup.

The episode covers the trial design, potential issues (mould, decomposition, nutrient deficiencies, wood toxins) and invites listener feedback as the team observes outcomes.

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