This fall garden planner helps balcony gardeners who want autumn crops before the first frost squeeze one more harvest out of the year. You enter a few numbers, and the tool works out the last safe sowing date for autumn crops. That matters because autumn gardening is a race against frost. Sow too late and crops freeze before they mature. Sow on time and you pick fresh leaves weeks after summer beds are empty.
Autumn crops succeed because they like cool weather. Lettuce, spinach, radish and kale all grow better when summer heat fades, and light frost even sweetens kale and spinach. The trick is counting backwards from the first frost, not forwards from today. Each crop needs a set number of days to mature, and the tool does that subtraction for you, so no crop is left half grown when frost arrives.
To use the tool, enter each value in order: Days from today until the first frost, Autumn crop. Then press Calculate to see the result. Each line shows one part of the plan, so you can spot a number that looks wrong before you sow. If you change any value, press Calculate again. The example button fills in a worked case so you can see how the tool behaves before you enter your own numbers.
Here is a worked example. Take with the first frost 60 days away, lettuce at 45 days must be sown in 15 days, which is 2.14 weeks from today, and harvested by day 60. That result is the point of the tool: one clear sowing date, with each part visible. If a neighbour asks when to sow autumn lettuce, you can walk through the same lines. If your frost date is earlier or later, you change one number and the plan updates. That makes autumn sowing fast and honest.
Sowing well in autumn also means protecting young plants. Water gently so cool soil stays damp, not soaked, and cover seedlings with fleece on cold nights. A simple cold frame or a sheet of fleece can add weeks to the season, turning a crop that would freeze into one that keeps picking into early winter. Harvest in the morning, when leaves are crisp and cold.
Three mistakes show up again and again. The first is sowing summer crops in autumn and hoping heat lasts. The second is sowing autumn crops a week too late, so frost catches them small. The third is forgetting to water, because cool air feels damp even when soil is dry. Count back from frost, sow on time, and cover on cold nights.
One last habit helps more than any single autumn trick: write down your first frost date each year. Note the date, what you sowed, and what survived. After a few years, you will see your own local pattern, which beats any general frost map. Small notes, kept each autumn, turn guessing into a sowing calendar that gets better every year.
Tips
- Sow a little extra. Autumn germination is slower, so a few more seeds cover gaps.
- Keep fleece handy from the first cold night. One unprotected frost can end a whole bed.
- Pick leaves little and often. Regular picking keeps autumn crops producing instead of bolting.
What if frost comes early?
Cover crops with fleece or an old sheet before nightfall. Hardy crops like kale survive light frost, but tender leaves need cover to keep picking.
Can I sow autumn crops in pots?
Yes, pots work well and move under cover on cold nights. Use fresh compost, water gently, and keep pots close to a sheltered wall.
Do autumn crops need feeding?
A light feed at sowing is enough. Cool soil slows growth, so heavy feeding wastes feed and can burn young roots.
Versión en español: Planificador de Huerto de Otoño