Signed in as

Problem helper Grower calculators Setup guide

Privacy policy Terms of use Contact us

Almost ready

The journal isn't connected to a database yet. Add your Supabase project URL and key to js/config.js, then reload this page. The README walks through it step by step.

Opening your journal…

Welcome back

Email

Password At least 8 characters.

I am 21 or older, I only grow where it's legal, and I agree to the Terms of Use and Privacy Policy.

Choose a new password

New password At least 8 characters.

Your grows

Start your first grow

A grow is one plant or one tent run. Give it a name and a start date, then add readings as you go.

Seed vault

Your seeds

Search your seeds

Pro

Compare grows

Pick up to 6 grows to put side by side. The best result in each row is marked in gold.

Loading readings…

Readings by day

Line up by

Show as a table

Side by side

Harvest

Feeding chart

This week's feed

Nutrients

Mixing

Strength

See the full chart

Add today's entry

This entry is for

Feeding

Date

pH

EC mS/cm

Water L

Temp °C

Humidity %

Light PPFD

Leaf VPDAdd temp and humidity

Height cm

Jar humidity %

Runoff What drains out of the pot. Compared with what went in.

Runoff pH

Runoff EC mS/cm

What did you do? optional, tap all that apply

Not sure what it is? Ask the problem helper. It uses your latest readings.

Note

This entry's current photo

Current photo Choose a new photo below to replace it. Remove this photo

Photo optional

Trends

Show as a table

Got a Govee, SwitchBot or AC Infinity sensor? Bring in its temperature and humidity history.

Grow-lapse

Your grow-lapse starts with one photo Add a photo to an entry every few days. They'll line up here so you can watch your plant grow, start to finish.

Journal

Show entries with

© 2026 Grow Log Pro · 21+ only. Grow only where home cultivation is legal. Setup guide Calculators Problem helper Privacy Terms Contact

New grow

Name

Strain

Growing in

NutrientsShows each week's mix from the brand's own chart. You can change it later.

Type of plant

Flowers when you switch the lights to 12/12.

Start date

Flipped to 12/12Leave empty while in veg.

Flowering time weeks, optional From the breeder or seed pack. Gives you a harvest countdown.

Add a plant

Name

Strain optional

Notes optional

Pro

Import sensor data

Export from your sensor's appGovee Home, SwitchBot or AC Infinity: open the sensor, find Export data, and save the CSV file.
Choose the file hereIt's read on this device. Only one summary per day is saved: lowest, average and highest.

Sensor file CSV

Check the columns look right:

Date and time

Dates are written

Temperature

Temperature is in

Humidity

Add seeds

Strain

Breeder optional

Type of plant

Seeds are

How many

Flowering time weeks

Got them optional

Notes optional

Pro

PDF grow report

Include Charts of your readings Photos Journal entries and notes

Tap Create PDFYour report opens in the print screen.
Choose "Save as PDF"As the printer or destination. On iPhone, tap Share, then Save to Files.

Your plan: Free

Free and Pro

Early access: everything is unlocked for everyone right now, free. Pro launches soon.

Your setup

Tent, light and air

Tent or space inside size, width × depth × height

Width × Depth × Height Unit

Light optional

Light watts from the wall

Exhaust fan optional

Fan CFM on the box

Carbon filter

Clip fans

Anything else optional

iPhone and iPad

Add Grow Log Pro to your home screen

Open this page in SafariOther iPhone browsers can't add apps to the home screen.
Tap the Share buttonThe square with an arrow pointing up, at the bottom or top of the screen.
Choose "Add to Home Screen"Scroll down the list if you don't see it, then tap Add.

It opens full screen like any other app, and you stay logged in.

My recipes

New feeding recipe

Start fromCopy a brand's chart and change what you like, or start with a blank recipe.

Recipe name

Amounts are per

Products

List them in the order you add them.

Amounts by week

Veg weeks Flower weeks

Leave a box empty to skip that product that week. A week with nothing in it is a plain-water week. Ranges like 2-5 are fine. If your veg runs longer, the last veg week repeats.

Notes optional

Log harvest

Harvest date

Wet weight g

Dry weight g

Not dry yet? Leave dry weight empty and add it after the cure.

Each plant optional

Weigh plants separately and the totals above add up for you.

How did it go?

★5 stars ★4 stars ★3 stars ★2 stars ★1 star

Final notes

Harvest logged

Change password

New password At least 8 characters.

Type it again

Delete my account

This permanently deletes and every grow, entry and photo in it, right away. It can't be undone.

Want to keep a copy first? Use Download my data in the account menu.

Type DELETE to confirm

Welcome

Your grow journal is ready

Start a growOne plant or one tent run. Give it a name and a start date.
Log as you goA reading, a note or a photo. Under a minute a day.
Watch it growCharts, a photo grow-lapse and your harvest, all in one place.