Seasons, not sprints
Features are allowed to mature, instead of shipping on a quarterly clock. What does not survive a season does not get in.
Gartenkern is the software I needed myself as an allotment gardener in Berlin, and for my family. So I am building it.

The honest version: how lost labels, forgotten fertiliser and open pruning questions turned into garden software.
Spring 2022, took over an allotment in Berlin. Planted berry bushes, two young fruit trees, prepared the first beds. Already in the first summer the variety labels on trees and shrubs vanish in the rain, and with them the knowledge of what is actually growing there.
In the second year the next questions show up. Which bed had the heavy feeders last year? Which plants get along next to each other, which ones better not? Did the berry bushes already get fertiliser, or am I mixing that up with last week? And when do I prune which tree without losing the next harvest?
It was not the garden that overwhelmed me. It was everything that nobody writes down.
Every one of these questions I had already answered once, in my head, in a spreadsheet, in a photo album. I just could never find the answer again. From exactly these gaps grew the list that is Gartenkern today:
When that works, even in ten years you still know which apple variety stands on the west side, when the currants were last pruned and which bed the tomatoes have no business in this year.
One season after another. One bed after another.
Features are allowed to mature, instead of shipping on a quarterly clock. What does not survive a season does not get in.
Balcony box, raised bed or orchard meadow — the same garden grows with you, from the first pot to the full year.
A family garden from day one: everyone involved sees the same garden, partner, kids, even grandparents.
Export anytime, ad-free. Your seasons belong to you, available for a lifetime.

I have been building software for over 15 years. Since 2022 I have had an allotment in Berlin, picking my own cherries and apples has been a summer duty ever since, and the first tomatoes and cucumbers become a fresh salad with feta. What I was missing: a tool that counts the seasons along with me. So I am building it, for myself, my family and everyone who feels the same.
This is where the idea for Gartenkern grew, out of a spreadsheet and a photo album.
The first version takes shape, at first just for my own garden and family.
The web app is running, early access starts from summer 2026.
Gartenkern already runs in the browser, the mobile apps follow, all in sync.
Dedicated areas for organisations, with the tools they additionally need.
Gartenkern grows from one person, but it is best with many hands. If the project grabs you, get in touch. No paid roles, but honest involvement in what is being built here.
Set up your garden and give feedback from real seasons.
Old farm and local varieties that are in no database.
Planting dates and tips for your climate zone.
Code, translation or design, if you feel like it.
Sign up for early access or write to me directly. No ads, no spam, just Gartenkern, season after season.