Stop Guessing.
Plant by Soil.

Your experience is real, and it's your most valuable asset. But experience is built on historical patterns, and weather is no longer behaving historically. Growing seasons are shifting. Last frost dates are moving. Spring cold snaps are arriving later and more erratically than the patterns you built your knowledge on. SoilIQ doesn't replace what you know — it validates it in real time. Think of it as your instinct, confirmed by live data. When your gut says "plant this week" and SoilIQ's root zone reading agrees, you move with total confidence. When they disagree, you have 14 days of forecast to figure out why before it costs you a stand.

No one's asking you to change your routine. Just add one data point to it. The 2010s and 2020s have produced the most irregular spring temperature swings on record in most of North America. Late-season cold snaps, compressed warm windows, and early heat events are becoming the norm, not the exception. The farmers and superintendents who added soil data to their existing routine didn't abandon what worked. They stopped losing the seasons where history wasn't a reliable guide. SoilIQ takes 60 seconds to check. One season where it prevents a loss and it's paid for itself indefinitely.

Not even close. In early spring, air and soil temperature are routinely 10–20°F apart. A warm week that pushes air temps to 65°F can sit on soil that's still 42°F, cold enough to rot a seed before it germinates. Seeds, roots, and turf don't respond to what's happening in the air. They respond to what's happening at their depth. Corn germinates above 50°F root zone. Tomatoes need 60°F at 2 inches. Bermuda grass goes dormant below 55°F soil surface. Air temperature tells you what to wear. Soil temperature tells you when to plant.

Extension data is regional, usually averaged across an entire county or climate zone. Your specific field can run 5–15°F different from the regional average depending on soil type, shade, slope, irrigation, and mulch. A north-facing shaded bed and an open south-facing field 50 feet apart can be a full week apart in planting readiness. SoilIQ's live model data combined with My Yard calibration narrows that gap significantly, giving you data specific to your site, not your county. And it delivers it as a 14-day forecast with planting windows already calculated, not a table you have to interpret yourself.

SoilIQ asks one thing of you: open it once in the morning. The app tells you your soil temp, which crops are ready, and whether anything is about to change in the next 14 days. No configuration, no manual data entry. The free tier costs nothing and gives you live soil readings, a Soil Health Score, and hourly chart from the moment you open it. If you try Pro for 7 days and it doesn't fit your workflow, cancel in seconds from your iPhone settings.

SoilIQ pulls from high-resolution global data updated hourly, but no model is perfect for every field. That's why Pro includes My Yard: log a manual thermometer reading and SoilIQ applies a persistent correction to every future forecast for your site. The more readings you log over time, the sharper your local accuracy gets. Real growers who've run the same field for years build a profile that becomes more accurate than any regional estimate, calibrated to their specific field conditions.

Both can be right. They're measuring different things. SoilIQ's reading comes from a high-resolution atmospheric model that estimates soil temperature at standardized depths across a ~1–9 km grid cell centered on your location. Your physical probe measures the exact spot you pushed it into. These will legitimately diverge for a few reasons: depth — a probe at 3 inches reads a different layer than the app's 2-inch root zone value. Time of day — surface and shallow temps swing 8–15°F between morning and afternoon, while the model represents a daily average. Microclimate — a south-facing raised bed against a brick wall can run 10°F warmer than an open field 20 feet away. Soil type — dense clay and saturated soil hold cold much longer than loose, well-drained beds. Use Probe Calibration in SoilIQ's Settings to enter your probe reading alongside the app's reading. SoilIQ calculates the offset and applies it as a persistent correction to every future reading for that location, closing the gap between the model and your actual ground.