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PODCAST

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.

leisure home & garden

All Episodes

9:04

Why Is My Rhododendron Flowering in Autumn? The Truth...

Hydroponics Daily ·

2025/11/01

Dr. Russell Sharp explains why plants like rhododendrons and other ornamentals sometimes flower in autumn — a phenomenon called precocious flowering caused by stress or unseasonal warmth. He outlines how this early bloom reduces spring displays and can ruin fruit crops.The episode discusses implications for hydroponic and indoor growers (especially strawberries and perennial crops), the need for cold treatment in some species, and practical considerations for vertical farming and controlled

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26:01

Ferns in Hydroponics: From Victorian Mania to Modern...

Hydroponics Daily ·

2025/10/31

Dr. Russell Sharp explores whether ferns are a viable hydroponic crop, covering their limited edibility, high value as houseplants, and conservation concerns from historic "fern mania." The episode explains fern biology and propagation—spores, gametophytes, divisions and micropropagation—plus humidity, foliar uptake, and practical hydroponic considerations for successful cultivation. https://eutrema.co.uk/shop/fertiliser/liquid-gold-unique-complete-fertiliser/ Joe Swift Home Grown Marf’s Kitchen

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8:24

Minecraft and Vertical Farms: Harvest London's Canary...

Hydroponics Daily ·

2025/10/30

Dr. Russell Sharp explores Harvest London’s open, glass-walled hydroponic farm at Canary Wharf—an accessible vertical farm supplying leafy greens and microgreens to local restaurants and food stalls. The multi-tier, pesticide-free system is visible to the public, making hydroponics educational and tangible for visitors. The episode highlights how public display boosts trust and perceived value, the site’s strict biosecurity and clean operations, and why integrating visible farms into food halls can

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7:34

Hydroponic Top Trumps

Hydroponics Daily ·

2025/10/29

Russell introduces his hydroponics-themed Top Trumps card pack covering 32 pests, diseases and physiological issues, scored by damage, commonness, difficulty to treat and "bounce-back" ability. He outlines plans to print the cards, asks for feedback on entries, and notes podcast milestones and resources at eutrema.co.uk. https://eutrema.co.uk/shop/fertiliser/liquid-gold-unique-complete-fertiliser/ Donald Trump Melania Trump Baron Trump Chelsea physic garden Kew gardens Royal botanical gardens

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10:51

Secrets of Stomata: How Plants Balance Water and CO2

Hydroponics Daily ·

2025/10/28

Dr. Russell Sharp explains how stomata—tiny pores on leaves controlled by guard cells—regulate gas exchange and water loss, why their opening matters for photosynthesis, and how stomatal conductance is measured and used to assess plant stress. He also shares a simple, practical method for growers: the clear nail varnish peel technique to capture leaf impressions and view stomata under a microscope, plus notes on measuring limitations and applications for hydroponic

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6:58

Hardwood Cuttings: Cheap, Simple & Often Overlooked

Hydroponics Daily ·

2025/10/27

Dr. Russell Sharp explains hardwood cuttings for deciduous woody perennials, why they’re useful in autumn and winter, and how they’re easier and cheaper than softwood cuttings. He covers methods—using sand, perlite or a heated propagator, basal heat, rooting hormone, tips for hydroponic transfers, species that root well (willow, mulberry, hydrangea, dogwood), and how to avoid problems like pythium. Practical advice for propagating and transitioning cuttings into hydroponic

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6:30

Inside Lettuce Grow: Zooey Deschanel’s Stylish Home...

Hydroponics Daily ·

2025/10/26

Dr. Russell Sharp reviews Lettuce Grow, a celebrity-backed company (founded in 2019) that sells stylish, kitchen-scale hydroponic stands and kits like the Farmstand. He covers design, multi-layer systems, recirculating pumps, and accessories aimed at home growers.The episode discusses seedlings, fertilizers (A/B and one-part options), expected yields, pricing and usability for beginners, and why Lettuce Grow appeals as a direct-to-consumer, design-focused hydroponics

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8:38

The limitations of EC meters: what they can, and...

Hydroponics Daily ·

2025/10/25

Dr. Russell Sharp explains how EC meters work, what they’re useful for and their key limitations — including temperature sensitivity, inability to distinguish ion types, and poor detection of many organic inputs like Liquid Gold (Gold Leaf). Practical tips: always measure EC and pH in your actual water after adding the manufacturer’s recommended dose, flush runoff to prevent salt build‑up, and only use generic EC charts for standard mineral feeds — not for novel or organic

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7:29

Eat Your Way to Healthier Teeth: Israeli Study Finds...

Hydroponics Daily ·

2025/10/24

In this episode Dr. Russell Sharp discusses an Israeli study showing that diindolemethane (DIM), a compound formed when we digest cruciferous vegetables like broccoli and cabbage, can inhibit Streptococcus mutans growth and disrupt dental plaque. The episode covers how DIM could be used in future oral-care products or encouraged through diet, touches on brassica benefits for soil and hydroponics, and notes related trade and supply updates affecting produce

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8:15

Developing a Biodegradable Controlled‑Release Fertiliser

Hydroponics Daily ·

2025/10/23

Dr. Russell Sharp discusses manufacturing chitosan biofungicide and announces a lab breakthrough creating a biodegradable alternative to Osmocote, driven by concerns over microplastics and corporate practices. The episode covers trials showing hemp matting outperforms coco coir for microgreens, a failed cardboard grow‑media test, resilient ebb-and-flood clay bead trials, and planning considerations for a hydroponic shipping container. Additional notes include observations on Israeli agricultural

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8:41

Why Liebig's Barrel Falls Apart: Rethinking Nutrient...

Hydroponics Daily ·

2025/10/22

Dr. Russell Sharp examines Liebig’s Law of the Minimum and explains why the simple barrel analogy can mislead hydroponic growers. He highlights interacting nutrients, dynamic environmental changes, physiological adaptation, thresholds and non-linear responses.The episode explores alternative frameworks—Shelford’s tolerance, multiple limitation hypotheses, dynamic system models and ecological stoichiometry—that better reflect real-world crop nutrition. Practical takeaways: use Liebig’s law only as a

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9:48

Root Pruning: Control Growth from the Roots

Hydroponics Daily ·

2025/10/21

Dr. Russell Sharp explores the forgotten technique of root pruning and how trimming roots helps control shoot vigour in both hydroponic and soil-grown plants.The episode explains practical uses—bonsai, nursery stock, ornamental trees, and mother plants—container options like air pots, propagation tips with root cuttings, and precautions about pathogen risk. https://eutrema.co.uk/shop/fertiliser/liquid-gold-unique-complete-fertiliser/

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8:32

Root Cuttings: The Forgotten Propagation Technique

Hydroponics Daily ·

2025/10/20

Dr. Russell Sharp explains root cuttings — what they are, which plants respond well (eg. sassafras, paulownia/foxglove trees, aralia, clematis, hops), and why they’re useful for removing pests or reverting mature plants to juvenile growth. He also gives practical tips: when to plant vertically or horizontally, why you should avoid rooting hormones, risks like loss of variegation and reduced hardiness in the mother plant, and why root cuttings could be a game‑changer for hop

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8:19

Exposed: The Death of Journalism in Horticulture &...

Hydroponics Daily ·

2025/10/19

Dr. Russell Sharp rips into the horticultural and agricultural press for ignoring major public-interest stories—accusing industry influence, highlighting ICL’s controversial products, the spread of microplastics from controlled-release fertilizers, and attempts to sell carcinogenic metal-based fertilizers. The episode argues for tougher investigative journalism and promotes hydroponics as a cleaner, soil-free alternative; listeners are invited to share tips and reactions. https://eutrema.co.uk/

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16:10

Hydroponics in Schools: Growing Minds and Greens

Hydroponics Daily ·

2025/10/18

This episode explores the pros and cons of introducing hydroponic systems in schools, highlighting educational benefits like hands-on science, engineering, chemistry and business learning, as well as practical challenges such as cost and staffing.It also covers year-round growing, cross-curricular links, community partnerships, green walls and career pathways in ag‑tech and vertical farming. https://eutrema.co.uk/plant-health-periodic-table-poster/

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6:41

Lightning in a Bottle: Plasma-Activated Water for...

Hydroponics Daily ·

2025/10/17

This episode explores plasma-activated water (PAW): how ionized gas (like lightning) can be used to create reactive oxygen and nitrogen species that supply plant-available nitrogen and act as a natural sanitizer for hydroponic systems. We cover potential benefits (reduced synthetic nitrogen use, biofilm and pythium suppression, no toxic residue), practical approaches, current research and real-world trials, plus limitations such as dosing control, decay of reactive species, equipment costs and

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7:34

Why Ladybirds Fail in Hydroponics: The Truth About...

Hydroponics Daily ·

2025/10/16

This episode explains why ladybirds (ladybugs) are often poor biological control agents in hydroponic systems: adults tend to fly away, larvae may not eat aphids effectively or can die, they can clog filters, and invasive or disease issues can arise. Alternatives are discussed, including lacewings, predatory mites (which can be sustained with pollen), parasitoid wasps, entomopathogenic fungi, and other IPM strategies, plus considerations about cost, availability, and

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9:59

Hydroponic Mushrooms? Inside the World of Liquid...

Hydroponics Daily ·

2025/10/15

Dr. Russell Sharp investigates whether mushrooms can be grown without soil—covering liquid mycelium cultures, industrial mycelium bioreactors, and the limits of inert hydroponic media like rockwool. He explains that mycelium can be expanded in nutrient broths, but most mushrooms still need a solid organic substrate (straw, sawdust, or coffee grounds) to form fruiting bodies. The episode also discusses pests (fungus gnats), contamination risks, practical starter options (oyster mushrooms on

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8:51

Wetting Agents in Hydroponics

Hydroponics Daily ·

2025/10/15

Dr. Russell Sharp breaks down the three main types of surfactants (anionic, cationic, non‑ionic), how they’re used to re-wet hydrophobic grow media, and their roles as adjuvants and insecticidal soaps. He warns against sodium-based products like sodium lauryl sulfate and recommends sodium-free alternatives, highlighting Eutrema’s clay drainer, yucca extract, and non-sodium insecticidal

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13:28

Inside Growy: A Robot-Run Vertical Farm Tour in...

Hydroponics Daily ·

2025/10/13

Dr. Russell Sharp tours Growy’s Amsterdam vertical farm, exploring their unique fermented starch acetate growing media, automated gutter system with robots for seeding, irrigation and harvest, and energy‑efficient features like water‑cooled LEDs and heat recovery. The episode covers production figures (60 kg/m²/yr lettuce, 40 herbs, 35 microgreens), long shelf life, supply‑chain integration, crop challenges (spinach and basil), global expansion plans, and potential future mushroom

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306 results

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