Book 29, Question 78
Why is deep, slow watering better than a quick sprinkle?
A light sprinkle wets only the top of the soil and soon evaporates.
Plants then grow shallow roots near the surface, which dry out quickly. A deep, slow soaking sends water down so roots chase it deeper, making plants stronger in dry spells. Water thoroughly less often, instead of a little every day. Letting a hose trickle near the plant works well.
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Quick answers
Why is deep, slow watering better than a quick sprinkle?
Deep, thorough watering is preferred over frequent light watering to avoid shallow rooting, which makes plants less drought-tolerant.
Source: Iowa State University
More fun facts
- Established plants have more extensive root systems and need less supplemental watering.
- Woody plants should be watered more deeply, 12 to 18 inches, and infrequently, every 10-14 days when daytime temperatures are consistently in the 90s, to promote good root growth and health.
- Wise watering involves applying water slowly, deeply, infrequently, and directly to the root system.
- Home gardeners should focus on deep, targeted irrigation, soil moisture conservation, and efficient systems such as drip irrigation when water is limited.
Sources: Iowa State University, University of Nebraska, Oregon State University