A small plot is not a simpler project — it is a different challenge: short throw distances, overlapping zones, and limited pressure from a garden hose bib. Here is how to build a reliable automatic irrigation system for areas under 100 m².

Why small gardens are tricky

On large lawns, rotors with an 8–12 m radius work with plenty of margin. On 100 m² (10 × 10 m) you need nozzles with a 1.2–3.7 m radius — they have a higher precipitation rate (35–50 mm/h vs. 12–18 mm/h for rotors) and require more careful planning to avoid overwatering.

Small-space design challenges

  • Zone overlap: in a 5 × 8 m area, nozzles with a 3 m radius inevitably overlap by 30–50%. Use quarter-circle (90°) and half-circle (180°) nozzles near walls and fences.
  • Pressure limits: a garden tap typically delivers 2–3 bar at 15–20 L/min. Ten spray nozzles at 2 L/min each totals 20 L/min — which may exceed your tap capacity.
  • Obstacles: trees, pergolas, and pathways create shadow zones — better served by drip irrigation.

Choosing nozzles

  • Fixed spray nozzles (Hunter Pro-Spray, Rain Bird 1800): radius 1.2–4.6 m, precipitation rate 35–50 mm/h. Ideal for regularly shaped lawns.
  • Strip nozzles: rectangular coverage pattern for narrow strips 1–1.5 m wide (pathways, borders).
  • MP Rotator: radius 2.5–4.5 m, precipitation rate 10–15 mm/h. Lower rate = less runoff on clay soils.

Single-zone designs

If total flow does not exceed the source capacity (typically 15–25 L/min from a garden tap), the entire garden can run on one zone. This simplifies the system: one valve, one controller output, minimal pipe.

Combining spray and drip

The best approach for a small garden is a combined system. The lawn gets spray nozzles (precipitation rate 35–50 mm/h, run time 10–15 min), while beds and borders use drip tape (2–4 L/h, run time 30–60 min). Important: these two subsystems must run on separate zones because their run times differ by 3–4×. For drip zones, Netafim components are an excellent choice — their compact micro-irrigation emitters and UniRam tape deliver even coverage on small plots.

Drip irrigation for beds

Flower beds, vegetable patches, and shrubs are better served by drip tape or point-source emitters. Flow: 2–4 L/h per emitter, spaced 30 cm apart. Always install a 120-mesh filter and a pressure regulator (1–2 bar) at the drip zone inlet.

Controller: 4–6 zones

Even for a small garden, choose a controller with at least 4–6 zones: lawn, flower beds, vegetable garden, fruit trees. Recommended: Hunter X-Core (€50–80) or Rain Bird ESP-ME3 (€60–90). Wi-Fi models (Hunter HC, Rain Bird ARC8) let you control from your phone and use weather-based adjustments.

Budget-friendly system under €300

Minimal configuration for a ~60 m² plot:

  • Battery controller (Gardena Flex): €40–60
  • 6 spray heads Hunter Pro-Spray 04 + 8A/10A nozzles: €30–50
  • PE 25 mm pipe (20 m): €12–18
  • Fittings (elbows, tees, caps): €15–25
  • Drip tape (10 m) + filter: €15–25
  • Total: €112–178

Full system budget: €200–500

For a 100 m² plot with 3–4 zones:

  • Controller + solenoid valves: €80–150
  • Nozzles + spray bodies (8–12 units): €40–80
  • PE 25 mm pipe (30–50 m): €20–40
  • Fittings, valve boxes: €30–60
  • Drip tape + filter + pressure regulator: €30–50
  • Total: €200–380 (parts only)

Plan it in SmartPluvia

Generic pipes and fittings (PE 25 mm) are a budget option for mainlines and connections that significantly reduces overall cost.

Open SmartPluvia, select the "Rectangle", "L-shape", or "Long Narrow" template for typical small plot shapes. Place your nozzles — the system shows coverage zones, flags uncovered areas, and suggests optimal pipe diameters. Click BOM to get a full materials list with estimated cost.