Garden Watering Calculator
Garden Area (m²)
Water Target (L/m²)
Frequency
A garden watering calculator estimates how much water plants need based on pot size, plant type, and weather. Overwatering is as damaging as underwatering for most plants.
- 1Pot volume (L) × 10–20% = volume per watering
- 2Outdoor beds: ~20–25mm per week in dry weather
- 3Rain gauge: 1mm rainfall = 1 L/m² of garden
- 4Finger test: soil dry 2–5cm deep → time to water (most plants)
10L pot, watering when top 3cm dry=Add ~1–2L per watering; frequency increases in heat
| Plant type | Typical frequency |
|---|---|
| Succulents/cacti | Every 2–4 weeks |
| Indoor herbs | Every 5–7 days |
| Vegetables | Every 2–3 days in dry weather |
| Lawns (dry weather) | Twice weekly (20–25mm total) |
| Tropical houseplants | Weekly |
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