Free guide and practice pack. The workbook is supplied separately in the complete IdunSeed bundle. The inner-ZIP instructions below refer to that bundle; earlier copies retain their original rights.

Seed inventory & sowing calendar

From packet to sowing week.

Enter a frost date and the intervals on your seed packet. IdunSeed turns those inputs into calendar dates and a printable week.

Get a first result Set up my garden

A script-free Google Sheets template. You supply every date and interval; it has no weather or crop advice.

FICTIONAL EXAMPLE · YOUR RESULT WILL USE YOUR INPUTS

Pepper Test Sun

Last frost entered: 25 Apr 2027 · Print week: 14–20 Feb 2027

Stage	Calculated window	Check
Indoor sowing	14–28 Feb 2027	OK
Transplant	9–16 May 2027	OK

PrintWeek lists one Pepper indoor-sowing task for this week. These are calculated synthetic targets, not a Google Sheets screen or planting advice.

Start with one row

See a real calculation in your copy

This short practice uses the included fictional Pepper row. It shows exactly what to type and what the workbook should return.

Extract both ZIP files

Extract idunseed-0.1.1-guide-20261031.zip. Inside it, extract program/idunseed-preview-20260929.zip into a separate folder. The workbook is in the inner ZIP:

Inner programapp/IdunSeed.xlsxInner instructionsapp/IdunSeed-instructions.pdfOuter practice filesexamples/idunseed/

The program archive is the same preview program included with the current paid guide bundle. This guide adds instructions and examples, not a gated feature.

Make a Google Sheets working copy

Upload app/IdunSeed.xlsx to Google Drive. Open it with Google Sheets, then choose File → Save as Google Sheets. Keep the original XLSX as a clean master. Read the inner PDF instructions before using real packet data.

Set the fictional dates on Settings

Enter year, month and day as separate whole numbers. For this practice, type:

B3 · year2027

B4 · month4

B5 · day25

Settings B6 should show 2027-04-25. The shipped sample date is 2028-04-15; replace it before trusting any real plan.

Enter one fictional packet on Seeds row 8

Row 8 is the first space after the five DEMO rows. Its Row type is already MY DATA. Type the values below into their individual cells; leave all other input cells on row 8 blank.

Cell	Meaning	Type
`B8`	Seed / variety	Pepper Test Sun (fictional)
`D8` / `E8`	Indoor days from / to	−70 / −56
`H8` / `I8`	Transplant days from / to	14 / 21
`P8` / `Q8`	Packets on hand / used	2 / 0

Negative means before frost; positive means after. The numbers above are synthetic.

Read Calendar, then set PrintWeek

Calendar row 8 should show Indoor 2027-02-14 to 2027-02-28 and Transplant 2027-05-09 to 2027-05-16, both OK; packet balance is 2 and status OK. On Settings, enter B10=2027, B11=2, B12=14. PrintWeek should list one Pepper indoor-sowing task for 14–20 February. Open File → Print, choose the current sheet and Scale: Fit to width, and inspect the preview.

The five DEMO rows remain in the workbook but have no task in this fictional week. Their tasks may appear in other weeks.

After the practice

Start your own garden without demo tasks

Use a fresh copy of the original workbook for real planning. That keeps the practice example separate and gives you a clear starting state.

Make a new Google Sheets copy from the untouched app/IdunSeed.xlsx.
On Seeds, clear B3:R7 to remove all five fictional sample values. Leave the Seed IDs in column A and the rows themselves in place.
Enter your own seed in row 3 or the next empty row. Set its C cell, Row type, to MY DATA. Copy only values your own packet actually gives; leave unknown intervals and OVERRIDE dates blank.
Set your own last frost date in Settings B3:B5 and print week in B10:B12. Confirm Settings B6 shows your date and B19 reports zero DEMO rows.
Check each Calendar status before using PrintWeek. If a row shows an E- code, correct its Seeds inputs first.

Keep the row structure. Seeds, Calendar and the calculation sheets align by row. Clear or overwrite input cells; do not insert or delete whole rows. Sort only Seeds A3:R102.

Go further

Three-seed worked example

The included CSVs show all input cells and the expected Calendar result for three fictional seeds. Use them in your practice copy, starting at Seeds row 8.

1 · Settings

Open settings.csv
Frost date 2027-04-25; week starts 2027-02-14.

2 · Seeds

Open seed-rows.csv
Type its three rows into Seeds rows 8–10; leave empty fields empty.

3 · Compare

Open expected-calendar.csv
Compare Calendar rows 8–10, then open PrintWeek.

Expected week: one Pepper indoor-sowing task from 2027-02-14 to 2027-02-28. Pea shows an Outdoor window from 2027-03-28 to 2027-04-11. Zinnia shows indoor and outdoor windows and packet status LOW. The plain-text practice sheet lists every expected date.

Find and fix

When a date or task looks wrong

Calendar shows E-FROST or no dates

Check Settings B3:B5 and the computed date in B6. A missing or impossible frost date prevents relative intervals from calculating. B8 explains the error. Empty interval cells are intentionally blank.

Calendar shows E-DATE, E-OFFS or E-REV

On Seeds, correct an OVERRIDE date to a real YYYY-MM-DD date, enter whole-day intervals between −3650 and 3650, or make the end date no earlier than the start. A fixed OVERRIDE date wins over the interval in that cell.

PrintWeek is empty or shows a sample

Check Settings B10:B12 and Calendar for a window that touches those seven days. A DEMO row is real example data and may print; clear unused sample rows B3:R7 in a fresh copy before planning your garden.

Packet status says E-PKT, LOW or OUT

Use whole, nonnegative packet counts on Seeds. E-PKT flags invalid counts or more used than on hand. LOW means the positive balance is at or below the threshold in Settings B18; OUT means none remains.

Dates changed after sorting or a formula was overwritten

Sort only Seeds A3:R102. If a calculated cell was overwritten, start from a fresh original and copy your Seeds input range plus Settings B3:B5, B10:B12 and B18. Compare B6 with your own frost date before using the plan.

Only part of a task appears

PART means only one end of a window is known. The sheet treats that as a single day. Check your packet and the corresponding Seeds interval or OVERRIDE cells.

IdunSeed is a planning template for up to 100 seed rows. It has no weather, automatic frost date, crop database, reminders or agronomic advice. Google Sheets API formula calculations were checked for the supplied program; desktop/mobile editing and physical printing remain unverified. Inspect the print preview before use.