This free seed harvest planner helps you plan ahead instead of reacting when the harvest arrives all at once. Autumn and harvest work comes in a rush, and without a plan the best crops can spoil while you are still deciding what to do with them. Enter a few honest numbers, get a clear plan, and work through it step by step.
Pick the crop, enter how many plants you will save seed from, and enter the day you harvest the seed. Saving from several plants matters: it keeps the variety healthy and avoids the weak seedlings you get when every seed comes from a single plant.
The first result is the drying finish date, counted from your harvest date. The second result is the total number of seeds you can expect, based on typical seeds per plant. The third result is the number of packets you can fill, plus the years the seed should stay viable in cool, dry storage.
For example, seed from 5 tomato plants harvested on 1 August gives about 500 seeds, fills 25 packets of 20 seeds, finishes drying on 8 August, and should stay viable for about 4 years. That is enough seed for your garden and plenty to share.
Seeds must be fully dry before storage: they should snap, not bend, when you test them. Seed stored even slightly damp loses germination fast and can grow mould inside a sealed jar over winter.
A common mistake is entering a guessed number instead of a measured one. Guessed dates, weights and temperatures give a tidy-looking plan that does not match your garden, and the plan fails at the first real check. Measure what you can, use your best honest estimate for the rest, and adjust the plan after your first season of using it.
Label each packet with the variety and the year at once, while you still remember. Unlabelled seed packets are the most common seed-saving mistake, and mystery seed wastes a whole season when it turns out to be the wrong variety.
Before the season starts, walk your garden and list what you actually grew last year, what you ate, what you preserved, and what you threw away. That honest list is the best guide to this year’s plan, because it shows which crops earn their space and which ones only look good in a seed catalogue. Plan more of the first group and less of the second.
Keep a simple record as you work through the plan: the date you picked each crop, the weight, and how it stored. A few lines in a notebook turn a good guess into a reliable plan for next year, and they also show you which varieties store best in your conditions. Over two or three seasons, that record becomes the most valuable garden tool you own.
This plan works best as part of a wider garden routine. Pair it with a planting calendar, a watering routine and a simple notebook where you record what you actually harvested and stored. After one season, your own notes will be more accurate than any general planner, because they describe your soil, your weather and your habits.
Keep in mind that this planner gives general garden guidance based on typical values, not a guarantee for your exact variety or your exact conditions. Weather, soil, variety and storage conditions all shift real results, sometimes by weeks. Use the numbers as a solid starting point, check your crops regularly, and adjust as you learn what works in your garden.
Start with one crop and one plan, and get that plan right before you expand to the whole garden. A small plan you actually follow beats a large plan that stays on paper, and next season you can build on what worked.