Updated August 11, 2026
Boulder, Colorado lawn forecast
Live status from the same real-weather model behind our email alerts — soil temperature, rainfall and evapotranspiration for Boulder, Colorado, not a generic rule of thumb.
🌿 Spring feed window
Opened on March 23, 2026 — soil held ≥10.0°C (50°F) for 5 straight days.
🌱 Pre-emergent / crabgrass window
Opened on March 21, 2026 — a good window for crabgrass pre-emergent, before germination.
✂️ Mow rhythm
14 mow alerts fired so far this year, most recently on July 28, 2026 (under drought stress at the time — a raised cut height was worth considering).
💧 Watering assessment
Currently in a drought-stress episode — soil moisture deficit around 427mm.