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Frostline - Seed starting plan

Frost dates & sowing calendar
Patrick Hisni Brataas · Lifestyle
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App info

Developer
Patrick Hisni Brataas
Category
Lifestyle, Productivity
Released
Sep 3, 2026
Version
1.0 (Sep 4, 2026)
Price
Free
Size
2.5 MB
Requires
iOS 17.0
Age rating
4+
Languages
English

In-app purchases

Frostline Lifetime$79.99
Monthly$4.99
Annual$34.99
Current prices, App Store US.
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Release date

The release date was moved 1 time before launch.

About Frostline - Seed starting plan

Every seed packet says "sow 6 weeks before your last frost." Frostline is the app that knows when your last frost is — and turns every packet on your shelf into dates on a calendar. Tell it where you garden. It finds the nearest weather station in NOAA's 1991–2020 frost normals, shows you your season, and builds the whole year around it: when to start indoors, when to transplant, when to direct sow, when to expect the first harvest, and when to get the fall crops in before the cold comes back. WHAT YOU GET • Your real frost dates — from published NOAA station normals, not a hardiness zone guess. Choose how much risk you want to take: the average date, or the safer one you'd bet tomato seedlings on. • A season built for you — 60 vegetables and herbs, each with sowing depth, spacing, days to maturity and hardiness compiled from university extension publications. Every crop cites its…
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