Organic - Organic certification, Bio & mineral fertilisers, Soya, Nematodes

CO₂ - The role of Carbon Dioxide, Bonsai trees, Springtails

Nutrients - Interaction between nutrients, Spinach, Broad mites

Micro-organisms - Soil life rhizobacterias, Asparagus, Viruses

Oxygen & Roots - Root zone temperature, Parsnip, Pythium

Temperature - Air temperature & plants, Leeks, Atmospheric contaminants

Coco - Coco coir how to, Passion fruit, White fly

Pest control - Plant protection products, Two-spotted spider mite

Deficiencies - Plant nutrition & nutrient deficiency, Cucumber, Fusarium

Light - Effect of light on plants, TomTato, Root aphids

Growing media - Good quality soilless media, Courgette, Snails & slugs