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About Gartenkern · a one-person project from Berlin

Gardening takes patience, software does too.

Gartenkern is the software I needed myself as an allotment gardener in Berlin, and for my family. So I am building it.

Gardening in an allotment in Berlin
Allotment · Berlin
Climate zone 7b · since 2022
How it began

“Which label was that again?

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:

  • Labels that do not fade: every planting with photo, variety and location, stored for good.
  • Crop rotation and companion planting in view: what grew where and what grows well side by side.
  • Never forget fertilising and care: reminders at the right time, for the right bed.
  • A pruning window for every tree: when which cut is due, variety by variety.

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.
What Gartenkern stands for

Four values

01

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.

02

From the balcony, to the bed

Balcony box, raised bed or orchard meadow — the same garden grows with you, from the first pot to the full year.

03

Together, not alone

A family garden from day one: everyone involved sees the same garden, partner, kids, even grandparents.

04

Stays yours

Export anytime, ad-free. Your seasons belong to you, available for a lifetime.

Who is behind it

One person, one garden

Robert Gürgens
Robert Gürgens
Founder · Developer · Gardener

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.

Location
Berlin · climate zone 7b
Gardening since
2022 · allotment
Background
Computer scientist · 15+ years
Favourite harvest
Cherries · apples · tomatoes · cucumbers
Write to mehallo@gartenkern.de
The road here

One season after another

Since 2022
Grown

Own allotment in Berlin

This is where the idea for Gartenkern grew, out of a spreadsheet and a photo album.

Groundwork
Grown

From idea to tool

The first version takes shape, at first just for my own garden and family.

From summer 2026
Growing now

Web app & early access

The web app is running, early access starts from summer 2026.

Up next
Coming

Mobile apps

Gartenkern already runs in the browser, the mobile apps follow, all in sync.

Later
Coming

Modules for clubs, schools & nurseries

Dedicated areas for organisations, with the tools they additionally need.

Get involved

Solo does not mean alone

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.

01

Test the beta

Set up your garden and give feedback from real seasons.

02

Contribute varieties

Old farm and local varieties that are in no database.

03

Share local knowledge

Planting dates and tips for your climate zone.

04

Help build

Code, translation or design, if you feel like it.

I want to join inhallo@gartenkern.de

Will you grow with us?

Sign up for early access or write to me directly. No ads, no spam, just Gartenkern, season after season.