SowWindow
Make the most of your plan
Understand the calculations, manage your saved plans and make exports that work for you.
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Using SowWindow
Frost dates and planting windows
Enter full frost dates, use the right plan years, read planting windows, and understand why calendar exports use all-day dates.
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Crop data and sources
Read a crop source, distinguish missing data from an unsupported action, and keep edited values separate from recorded reference guidance.
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Planting windows and manual dates
Edit a task date, review a recalculated window, and retain deliberate manual changes when frost dates or other plan assumptions change.
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Create and edit sowing batches
Set a first sowing, interval and inclusive cutoff, review the generated batch dates, and keep individual changes when managing the plan.
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Beds, containers and spacing
Set dimensions, plant spacing, row spacing and margins, then read an exact rectangular or centered circular planting-position layout.
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Seed and seedling estimates
Enter your target plants, germination, survival and extra reserve, understand upward rounding, and correct invalid rate inputs.
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Save, back up and import a plan
Save plans in your browser, keep JSON backups, handle plan-ID conflicts, and recover safely from storage or unsupported-file errors.
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Export and print your plan
Choose PDF, CSV, ICS, SVG or JSON, understand each file’s purpose, and check dates, page layout and recovery after downloading.
Read the guide →Seed packet guide
Days to maturity: sowing or transplanting?
Find the starting point behind packet maturity days, keep nursery time separate, and use the right number in a fall planting calculation.
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