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Why Sunflowers Stunt in Extreme Heat: Deep Watering vs. Daily Sprinkling

In Phoenix’s 107°F+, daily shallow watering creates shallow roots and stunted growth. Water deeply (sprinkler 1.5+ hours) every other day, then transition to every third day. Wait until soil is dry 4–5 inches down. After a deep soak, apply liquid fertilizer (never on dry plants). Deep roots = strong top growth.

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