
summer10 min read
When to Apply Fungicide to Your Lawn — The 150 Rule Explained (2026)
Use the 150 Rule to time fungicide perfectly: daily high + nightly low = 150 means spray now. Plus the rotation schedule that prevents fungal resistance.
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Use the 150 Rule to time fungicide perfectly: daily high + nightly low = 150 means spray now. Plus the rotation schedule that prevents fungal resistance.