Never miss a sowing window again: the bell in your plant library
The best moment to sow is usually the one you forgot about. A small bell in the plant library reminds you in time — and it factors in your climate zone.
In my first balcony year I simply slept through two sowing windows. Not out of laziness, but because nobody thinks about corn salad in August and nobody thinks about peppers in January. Gardening is largely a calendar exercise — which is exactly where a small bell comes in.
The problem isn’t knowledge, it’s timing
Most beginner mistakes on a balcony aren’t knowledge gaps. You know corn salad gets sown in late summer. You know peppers need a long head start indoors. You just don’t think about it at the moment it actually matters.
A sowing calendar on the wall only helps if you look at it. And a note on your phone disappears into everyday life within two weeks. What’s missing isn’t more information — it’s a nudge at the right time.
How the bell works
Open any plant in the library. At the top, next to the share icon and the heart, you’ll find a small bell. Tap it and Rootivo asks what you’d like to be reminded about: sowing or harvest.
The app then schedules a reminder for the start of the next relevant month — at nine in the morning, an hour when you can still act on it. An active bell is highlighted in colour. Tap it again and you can remove the reminder.
All of this runs locally on your device. No subscription needed, and it costs you roughly three seconds per plant.
Why your location shifts the date
A sowing window isn’t a fixed number. If you garden in Vienna or Cologne you’re noticeably earlier in spring than someone in the Salzburg region or the Allgäu. Between a mild wine-growing climate and the harsher alpine foothills there can easily be two to three weeks.
Rootivo takes that into account. From the country and postcode in your profile the app derives your climate zone and shifts the dates accordingly. One condition: the postcode actually needs to be in your profile. If you skipped it during setup, now is a good moment to add it — it takes seconds and makes every season bar in the library more accurate.
Three bells worth setting in early September
Let’s start with what’s still possible right now. Corn salad can be direct-sown into October and then harvested from October right through to spring — it does surprisingly well in a balcony box because it needs little root depth. Rocket (rucola) and spinach also still have a direct-sowing window into September, though it narrows as the month goes on.
Open any of these three in the library, set the bell to sowing, and the app will nudge you at the start of the month — so you won’t miss the window while you’re busy harvesting tomatoes.
And three that February will thank you for
The real payoff, though, is next spring. Peppers and chillies need a long head start on the windowsill and typically get sown indoors from January or February in our latitudes. Tomatoes follow from February onwards. Those are exactly the dates you reliably forget in the depths of winter — and then have to make up for at the garden centre checkout in May.
Set those bells now, while it’s on your mind. It feels oddly forward-thinking to schedule three winter reminders on an August day. But that’s precisely the point.
A realistic way to start
You don’t need to cover half your library in bells. Five to eight reminders spread across the year are plenty — any more and helpful nudges turn back into noise you swipe away.
My suggestion: one bell for whatever you still want to sow now, two for winter sowing indoors, and one on the harvest of a plant whose timing you’re unsure about. Combined with the season bar in the library, which shows you sowing, planting and harvest months at a glance, that pretty much covers your gardening calendar.
Im Lexikon: Feldsalat