Lesson 5
Holiday watering that actually works
The best holiday watering is prevention. Two weeks before you leave, prune back anything leggy, deadhead flowering plants to slow growth, move pots into partial shade, and mulch beds with 5cm of compost. Less leaf area means less water demand.
For up to a week, grouping pots together in a shaded spot reduces evaporation by half. Stand them on trays filled with 2–3cm of water. This is not ideal for long-term health, but for seven days it keeps roots alive. Remove any plants from terracotta pots and transfer them temporarily into plastic — terracotta breathes and dries faster.
Beyond a week, you need automation. The cheapest reliable option is a battery-powered timer attached to an outdoor tap, running a drip system. Models from Hozelock, Gardena and Kärcher cost £25–60 and work flawlessly for fortnight-long holidays. Set two watering cycles: 6am and 6pm, each for 30–45 minutes depending on your plants and weather forecast. Test the system for three days before you leave.
Indoor plants need a different strategy. Capillary matting on a tray works for two weeks if you saturate the mat thoroughly. Alternatively, fill a bucket, place it on a stool above the plants, and run cotton wicks or strips of capillary matting from the bucket down into each pot. Water wicks downwards by gravity and capillary action. It looks eccentric but works perfectly.
Methods ranked by reliability
- Best: automated drip irrigation on a timer — near-perfect for 2–3 weeks
- Good: capillary matting or wicking system for indoor pots — reliable for 10–14 days
- Adequate: pots grouped in shade on water-filled trays — 7 days maximum
- Risky: asking a neighbour to water — depends entirely on their diligence and your instructions
- Useless: watering globes and spikes — they empty in 2–3 days and create uneven moisture
Preparing the garden before a two-week holiday
- 1.Prune back leggy growth and deadhead all flowers to slow water demand.
- 2.Weed thoroughly — weeds compete for moisture.
- 3.Mulch beds with 5cm of compost or bark to reduce evaporation.
- 4.Move all pots into partial or full shade; group them tightly together.
- 5.Set up and test the automatic irrigation system for three consecutive days.
- 6.Water everything deeply the evening before you leave.
Write down your watering schedule and leave it with a neighbour as backup — if the timer fails, they can hand-water from your clear instructions rather than guessing.