Know exactly what to plant this week, from your local frost dates.
Frostline reads your last-spring and first-fall frost dates from an open model trained on NOAA normals, then tells you what to sow now and why. Close the laptop, go plant.
Three steps, no sign-in.
Pick your spot
Type a US city or use your location. It stays on your device apart from the frost lookup.
Get your frost dates
An open tabular model, TabPFN, predicts your last-spring and first-fall frost from NOAA normals.
Plant this week
A deterministic planner picks what to sow now, and an open Gemma model writes it up in plain words.
The open pieces are what make it work.
Runs anywhere
Open weights mean the whole thing runs on a laptop or a phone, free, with no vendor to call.
Your data stays yours
Your garden location is used for a frost lookup and is not sent to a server you do not control.
Swap the model
Retrain the frost model for your microclimate, or point the advice at any open model you like.
Frost dates are TabPFN predictions from NOAA 1991-2020 normals. Advice is written by Gemma, with a built-in planner as the fallback. See what is real and what is simulated.