Hydroponics Daily
Daily clips of hydroponic science throughout the whole of 2025 Presented by Dr Russell Sharp Brought to you by the team behind Gold Leaf - seed to harvest with just one bottle of feed.
Episodes
Dr. Russell Sharp explores how breeders, genetic tools (including CRISPR) and environmental controls in hydroponics can reduce strong or bitter flavours in vegetables.
He highlights examples—low‑sulphur Brussels sprouts and onions, milder marrows/zucchini, soap‑free coriander, low‑oxalate spinach, less‑phenolic eggplant and sweeter lettuce—and points to hydroponic fertilizer strategies and business opportunities for growers and bre...
Dr. Russell Sharp closes out Hydroponics Daily’s 2025 run with a compact guide to the most toxic plants. He explains why “natural” or “plant‑derived” doesn’t mean safe and shares examples of species that can cause severe harm.
The episode lists the top poisonous plants to watch for, such as hemlock, giant hogweed, deadly nightshade, Brugmansia, monk’s hood, yew, oleander, castor bean, water hemlock and foxglove, plus practical safe...
Host Dr. Russell Sharp of Hydroponics Daily explains how hydroponic fertigation and his product Gold Leaf (Liquid Gold in the UK) can be used to biofortify edible crops with nutrients like iodine, selenium, iron, zinc and silicon.
The episode covers practical benefits, higher micronutrient content, potential shelf-life and quality improvements, and serious cautions, especially selenium toxicity, stressing professional handling and ...
Dr. Russell Sharp explains how to choose and use microbial biostimulants for hydroponics, focusing on production/expiry dates, manufacturer credibility, and the trade-offs between liquid and powder formulations.
He recommends trusted suppliers (Legume Technology, Omex/Biomex, Symbiom, Koppert's Trianum P), suggests starting with Bacillus blends and Trichoderma, and advises using seaweed extracts, humic acids and mild fertilizers to...
Dr. Russell Sharp explores research showing that squashes, pumpkins and other cucurbits can absorb persistent hydrophobic pollutants (PCBs, dioxin-like compounds, organochlorine pesticides and furans) because a specific plant protein binds these chemicals and transports them into the fruit.
The episode covers the health and food-safety implications, the potential to breed low-accumulating varieties or use phytoremediation, and why ...
Dr. Russell Sharp reviews Hydroponics Daily in 2025, highlighting the top podcast episodes, surprising listener interests (pH, nutrient lockup, microgreens), event highlights, product plans, and both wins and challenges from the year.
He also covers industry news, unusual stories like illegal grows, predictions for 2026, and plans to shift the podcast format while continuing to support growers and new products.
Dr. Russell Sharp examines the effects of coffee and tea on plants, explaining how caffeine and other compounds (tannins, organic acids, sugars) can act as low-dose biostimulants but become inhibitory or toxic at higher doses. He covers root drench vs foliar applications, allelopathy, impacts on microbes and pests, and how repeated use can harm photosynthesis, nutrient uptake and root health.
Practical takeaways: occasional small a...
Dr. Russell Sharp explores the story behind cotton candy grapes, explaining how they were created through patient, traditional plant breeding rather than artificial flavouring or genetic modification. He describes the selection process, the natural flavour compounds involved, and the decade-long effort by breeders to bring this unique-tasting fruit to market.
The episode also looks at research into breeding strawberries and other f...
Dr. Russell Sharp exposes a growing problem of fake plant listings and AI-generated seed scams on Amazon and other marketplaces, showing how buyers are being misled by impossible varieties (like bright blue hostas) and foreign drop-shippers.
He explains how to protect yourself—check seller and nursery credentials, prefer reputable nurseries or local stores—and shares a real seed mix-up story to contrast honest mistakes with deliber...
Dr. Russell Sharp explains how melatonin — a molecule known for human sleep and stress regulation — is produced by plants and acts as a powerful antioxidant and growth regulator. In hydroponics it can enhance root growth, improve stress tolerance under high light or unstable conditions, delay leaf senescence, and support photosynthesis and secondary metabolite production.
Applied as a foliar spray, seed priming, or added to nutrien...
Host Dr. Russell Sharp tackles a Twitter claim that hydroponic crops lack micronutrients and are artificially flavoured, explaining why those assertions are incorrect and how micronutrient levels can be measured (e.g., atomic absorption spectroscopy).
He reviews research on manipulating flavor through nutrient levels, light, and biostimulants, notes the limited and mixed evidence, and concludes there is no solid proof of intentiona...
Dr. Russell Sharp examines a warning from the UK Urban AgriTech group that a planned 94% increase in electricity network standing charges from April 2026 could dramatically raise operating costs for vertical farms and greenhouses, risking business failures, reduced domestic produce and higher food prices.
The episode explains how horticulture is excluded from the energy-intensive industries exemption, compares UK energy costs with ...
In this episode we examine why carnivorous plants and bonsai often struggle in coco grow media — coco (coir) can contain high sodium and is frequently buffered with calcium nitrate, resulting in elevated calcium and nitrogen compared with peat.
The host suggests a fix: use raw high-sodium coco and flush it with Liquid Gypsum (calcium sulfate) to remove sodium without adding nitrogen, creating a peat-free grow medium suited to carni...
In this episode Dr. Russell Sharp explains how dosatrons work and compares practical alternatives for run‑to‑waste hydroponic systems, including Venturi injectors, electric metering pumps, and simple fertigation tanks. He outlines the pros and cons of each option — cost, accuracy, power needs, maintenance, and scale — and covers considerations about recirculation, environmental impact, and regulatory risk. Ideal for growers choosin...
Hello there, and welcome back to Hydroponics Daily, your go-to podcast for everything soilless cultivation. I am your host, Dr. Russell Sharp, the founder of Eutrema Limited, a company that makes truly unique fertilizers, biostimulants, and biopesticides that you won't find anywhere else. The technology is completely unique. And today, the topic of the podcast is what I would do if I was faced with a virus in my crop. Specifically ...
Dr. Russell Sharp explores the growing interest in perennial arable crops like Kernza, perennial rice and sorghum, explaining their environmental benefits, current commercial status, and the agronomic challenges they face.
The episode also discusses breeding and gene-editing opportunities to improve yield and resilience, and considers how perennial grains might fit into hydroponic and niche high-value markets.
Dr. Russell Sharp explains how Dosatrons (water-powered dosing pumps) mix concentrated fertilizer like Gold Leaf/Liquid Gold into fertigation systems, describing the piston-driven mechanism, proportional injection, and why it maintains a constant concentration despite flow changes.
The episode covers practical setup tips for off-grid hydroponics — solenoids, drippers, solar pumps, and how a Dosatron enables accurate, electricity-fr...
Dr. Russell Sharp of Hydroponics Daily breaks down the truth behind "cut-and-come-again" vegetables and viral social media hacks, explaining which crops genuinely regrow and which claims are misleading.
Learn which leafy herbs and greens can be harvested multiple times, why most bulky vegetables won’t produce a marketable second crop, and when starting fresh is a better option for consistent yields.
Dr. Russell Sharp explores advanced preservation methods for flower crops; from freeze-drying and glycerin sap replacement to citric acid treatments used for hops,cand how these techniques can create premium, display-ready products for shops, dispensaries, and e-commerce.
This episode offers practical ideas for ornamentals and specialty growers looking to add high-value, long-lasting products to their lineup.
Dr. Russell Sharp outlines the key 2026 dates affecting hydroponic growers (equinoxes, longest day) and recommends major trade shows and conferences worldwide — from IPM Essen and Fruit Logistica to Greentech Amsterdam, Indoor AgCon and MJBizCon.
He also highlights UK and crop-specific events, tips for timing indoor grows, and invites listeners to suggest other shows for an updated diary.
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