Sprinkling: Pros, Cons, and Measuring Delivery

Hand watering with nozzle/fan is enjoyable but usually inadequate—takes too long to soak soil. Useful for new transplants, seedlings, containers where gentle, precise application is needed.

Sprinklers (artificial rainfall) are simplest for large areas. Many plants, especially those liking cool humidity, thrive with overhead sprinkling. Rinses dust, discourages spider mites. But negatives: wind carries off water; runoff on pavement is lost. In humid climates, encourages foliage diseases (black spot, rust)—minimize by sprinkling early morning so leaves dry quickly. Weak-stemmed or heavy-flowered plants may break under water weight.

MEASURING SPRINKLER DELIVERY RATE AND DISPERSION

Need to know water penetration speed and sprinkler delivery rate. 1″ water moistens ~12″ in sand, 7″ in loam, 4–5″ in clay. To water 12″ deep: ~1″ water on sand, 2.5–3″ on clay.

To determine delivery rate: place equal containers (straight-sided coffee cups) at regular intervals from sprinkler. Time how long to fill 1″. Test also shows delivery pattern (containers fill at different rates). Move sprinklers for overlapping coverage to ensure even watering.