GroJo
Your Grow Journal

Grow local.
Eat local.
Brag a little.

GroJo maps your garden, keeps a journal for every plant, and gives you a FarmStand to sell, trade or share what you grow with the neighbors down the street. Tomatoes from two doors down beat tomatoes from two states away.

Tell me when it's out See how it works

Not out yet. We're getting it ready for iPhone and Android.

The GroJo garden map: a sample garden with two raised beds, one with tomatoes, basil and peppers, the other with kale, spinach, lettuce and garlic.
Sample garden shown

It worked before

Backyards once fed the country.

During World War II, Americans dug up lawns, vacant lots and schoolyards and planted victory gardens. It wasn't only about food. It was neighbors handing tomatoes over the fence and swapping seed for next year.

~20 millionhouseholds grew a victory garden by 1944
~40%of the country's fresh vegetables, by wartime estimates

We think it still works. GroJo is a Grow Journal for the backyard, the balcony and the patch behind the garage, built to help neighbors grow, share and eat close to home.

Figures are wartime U.S. government estimates, as reported by Smithsonian Gardens and The National WWII Museum.

An illustrated garden map from GroJo: Bed 1 with tomatoes, basil and peppers, Bed 2 with kale, spinach, lettuce and sixteen garlic cloves.
Back Fence Garden, a sample garden, as GroJo draws it.

How it works

Everything your garden did this year, in one journal.

Plan it, grow it, save it, share it. Here's what GroJo does today.

Grow

Every plant keeps a journal.

Tap a plant to see where it is and what it needs. GroJo counts the days to harvest from the plant guide and keeps a timeline of everything you log.

  • Stages from sown to sprouted, flowering, fruiting and harvested
  • Log watering in one tap, plus notes, photos and health checks
  • Care reminders when a plant needs you
  • Indoor gardens too, windowsills included
A Cherokee Purple tomato in GroJo: marked healthy, with Save seeds, Harvest and one-tap care buttons.
A windowsill garden in GroJo: a Genovese basil seedling on Day 13 of about 60.

Plan

Remember what grew where.

Draw your beds and pots to scale and tap where each plant goes. When the season ends, GroJo keeps a map of it, so next spring you know where the tomatoes were.

  • Spacing for each crop, from 16 carrots a square foot to a pumpkin on its own
  • Good companions shown as you plant
  • A heads-up before you plant a crop where its family grew last year
  • Scan a seed packet and GroJo fills in the details
Past seasons in GroJo: the 2025 map of a sample garden, with peas, beans, carrots, tomatoes, peppers and zucchini.

Save

Save your seed, like they used to.

Once a plant flowers, GroJo shows you how to save its seed and adds it to your seed library, with how long it usually stays good.

  • Seed-saving steps for every crop in the guide
  • A note when a hybrid won’t grow true
  • Your seeds list shows what you have and what to sow first
  • Plant straight from your own seed next year
Saving Cherokee Purple tomato seeds in GroJo, with a tip: ferment the seeds in a jar for two or three days, then rinse and dry them.
Your seeds in GroJo: saved basil, peas and tomato, and bought spinach marked Best sown this year.

FarmStand

Too many zucchini? Somebody wants them.

Anything from your garden can go on the FarmStand: a basket of tomatoes, extra seedlings, cuttings, a jar of saved seed. Sell it, trade it or give it away. Neighbors tap Message and the first note is already written.

  • Fruit, veggies, herbs, plants, cuttings and seed
  • Filter by for sale, trade, free or near you
  • You agree on the details in messages and meet somewhere public
  • GroJo doesn’t take a cut, handle payment or keep your address
  • Report and block are always one tap away
The GroJo FarmStand filtered to free offers: basil seed, thyme clumps and Red Russian kale seed from sample gardeners.
A FarmStand offer of free Red Russian kale seed from a sample gardener, with a Message button and a reminder to meet somewhere public.

Neighbors

Peek over the fence.

See what gardeners near you are growing, follow along, and leave advice when someone asks for help. Invite a friend or family member to grow a garden with you.

  • Find gardens by crop, zone, season or distance
  • React and comment on how things are coming along
  • Help requests show on the garden, so neighbors can pitch in
  • Caretakers: grow one garden together
A sample neighbor’s garden in GroJo asking for help with broccoli, with a map of the raised bed and its plants.

Brag

Go on, brag a little.

You earned it. GroJo makes the good stuff easy to show off.

Share your map

Turn your whole garden into a picture, drawn in daylight, ready for a text or a post.

Garden photos

Add photos of the whole garden and watch it change over the season.

Hearts, sprouts and blooms

Neighbors react to how your plants are coming along.

In the works

Next: local farms on the FarmStand.

Backyard gardens are just the start. We're building a place for small farms and market growers too, so the FarmStand near you can carry eggs from the house on the corner and a box of tomatoes from the farm up the road: food that traveled blocks, not states.

Run a farm or a market garden? We'd love to hear from you while we build it.

I run a farm or market garden Tell me when it's out

Grow local. Eat local. Brag a little.

GroJo isn't out yet. Leave your email and we'll let you know. Happy growing.

Tell me when it's out