Patch & Pot
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Lesson 1

Why irrigation matters more than you think

Most plant deaths are water deaths. Too much, too little, or — most insidious — the right amount delivered at the wrong rhythm. A tomato that gets 2 litres every Monday will split its fruit and rot its roots. The same tomato given 300ml every evening will fruit until October.

Irrigation is not about convenience. It is about consistency. Plants build root systems and regulate their stomata based on the water pattern you establish. Change that pattern suddenly — a week of holiday, a heatwave, a switch from hose to can — and the plant goes into shock.

Automated systems are not lazy gardening. They are better gardening. A timer and a drip line deliver water at dawn when evaporation is lowest, directly to the root zone, at a rate the soil can actually absorb. That is something even an attentive gardener with a watering can rarely achieves.

What you'll learn

  • How to choose and install drip irrigation for beds, pots and vertical gardens
  • The numbers that matter: flow rates, pressure, emitter spacing
  • Reliable holiday watering strategies that actually work
  • How to diagnose and fix underwatering vs overwatering

Numbers that matter

  • Dawn watering reduces evaporation loss by 40–60% compared to midday
  • Most vegetables want 2.5–4cm of water per week during active growth
  • Drip emitters typically deliver 2–4 litres per hour per point
  • Capillary matting holds roughly 3 litres per square metre
  • Self-watering reservoirs last 7–14 days depending on plant size and weather

Water in the morning so foliage dries by evening — damp leaves at night invite fungal disease.

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