One-time downloads · $2.99–$9.99 USD. No subscription.

Perunlight

IdunSeed · Tool + guide bundle

Plan sowing dates from your seed inventory

Keep a seed inventory and sowing dates relative to your chosen frost date.

$2.99 USD · one-time purchase

Document / template · opening steps

Extract both ZIPs, then upload the inner app/IdunSeed.xlsx to Google Sheets. GUIDE.html gives a five-step fictional seed practice and exact steps to remove DEMO data before planning your own garden.

Download: ZIP with the described tool and instructions. Check compatibility & limits.

See it in useBuy download — $2.99

No subscription. Final total and tax appear at checkout.

View the illustrated example. Read the illustrated guide and inspect the sample files free of charge. The complete program is supplied in the purchased download. Previously obtained copies retain their included license rights.

Chrome 152 PDF viewer showing the actual IdunSeed-printweek-sample.pdf extracted from the accepted ZIP
Chrome 152 PDF viewer showing the actual IdunSeed-printweek-sample.pdf extracted from the accepted ZIP; synthetic sample, not a Google Sheets UI capture. View full size

See it in use

Plan sowing dates from a frost date

A screenshot walkthrough with fictional practice data. Select a step to explore.

The date-planning screen and earlier PDF capture are separate examples from the unchanged program; physical garden use is unverified.

1. Start with

Plan sowing dates from a frost date

Use the fictional 2027 frost settings and three seed rows.

Sample files and contents

examples/idunseed/settings.csv (a fictional last frost date 2027-04-25 and print week starting 2027-02-14), examples/idunseed/seed-rows.csv (three fictional seeds for Seeds rows 8 to 10) and examples/idunseed/expected-calendar.csv (the dates you should see).

Practice files and guides are free. The complete app is included only where the product page says so.

2. In the app

IdunSeed guide showing the fictional Pepper practice and its calculated sowing and transplant dates.
Actual browser capture of the guide. Calculated fictional targets, not a Google Sheets screen or planting advice. Enlarge image ↗

Try it in three steps

  1. Enter the frost date and print-week settings.
  2. Add the three seeds and inspect Calendar calculations.
  3. Compare the calendar with expected rows, then open PrintWeek.
Show every click and setting
  1. On Settings type 2027, 4 and 25 into B3, B4 and B5, and 2027, 2 and 14 into B10, B11 and B12.
  2. On Seeds type the three rows from seed-rows.csv into rows 8, 9 and 10, leaving empty cells empty.
  3. Open the Calendar sheet and compare rows 8 to 10 with expected-calendar.csv.
  4. Open the PrintWeek sheet.

3. The result

A separate demonstration

The guide expects dated sowing and transplant windows for all three seeds. The shown PDF is an older separate example, not a verified Google Sheets edit.

The date-planning screen and earlier PDF capture are separate examples from the unchanged program; physical garden use is unverified.

Chrome PDF viewer displaying the supplied IdunSeed synthetic PrintWeek sample.
Earlier actual PDF capture from the unchanged program archive. This is not a Google Sheets editing or physical printing check. Enlarge image ↗
What to check in the practice result

Settings B6 shows 2027-04-25. Calendar row 8, Pepper Test Sun: Indoor 2027-02-14 to 2027-02-28 and Transplant 2027-05-09 to 2027-05-16, both OK, packet status OK. Row 9, Pea Early Example: Outdoor 2027-03-28 to 2027-04-11, OK. Row 10, Zinnia Demo Mix: Indoor 2027-03-14 to 2027-03-28 and Outdoor 2027-04-25 to 2027-05-09, packet balance 1, status LOW. PrintWeek for 2027-02-14 to 2027-02-20 lists one task: Pepper Test Sun, stage Indoor sowing / Посев дома, from 2027-02-14 to 2027-02-28. The five DEMO sample rows stay in the sheet but have no task in that week.

What it helps you do

Record your seed stock, set the frost date for your location, and review the sowing calendar calculated from your own inputs.

What is in your download

  • The unchanged IdunSeed 0.1.1 program archive and its original permissions.
  • An illustrated guide with a one-seed first result, exact dates and phone-readable inputs.
  • Three fictional seed examples, recovery steps, license notices and checksum manifests.

Before you buy

  • A Google account and Google Sheets in a web browser. The .xlsx file is only the way the template travels; Excel and LibreOffice are not supported targets.
  • Your own last frost date and the intervals from your seed packets. IdunSeed contains no weather data and gives no gardening advice.
  • The complete idunseed-0.1.1-guide-20261031.zip download. It contains the unchanged program/idunseed-preview-20260929.zip (program version 0.1.1).

Extract both ZIPs, then upload the inner app/IdunSeed.xlsx to Google Sheets. GUIDE.html gives a five-step fictional seed practice and exact steps to remove DEMO data before planning your own garden.

Compatibility & limits

Planning template only; not weather or agronomic advice. Google Sheets API formula calculations checked; desktop/mobile editing and physical printing unverified.

See how it works

Read the illustrated guide and inspect the sample files free of charge. The complete program is supplied in the purchased download. Previously obtained copies retain their included license rights.

View the illustrated example

Get IdunSeed

Perpetual use of the purchased version on your devices for personal or internal commercial work. Keep reasonable backups and modify your own copy; do not redistribute or resell original proprietary code. Third-party licenses and any existing preview permissions retain their rights.

Before payment, save the private recovery code shown by checkout. After Paddle confirms payment, use it to download your ZIP or return for it later. No subscription, future update or email delivery is promised. See the illustrated steps.

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$2.99 USD · once

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