How to Keep a Cannabis Grow Diary

Turn weekly observations into a useful record for learning and troubleshooting.

Privacy reminder: Keep cultivation lawful and private. Remove location metadata from photos and do not publish addresses or identifying details.

Why grow diaries help

A diary replaces vague memory with a timeline. It makes it easier to identify patterns, compare changes, repeat what worked, and explain a problem clearly when asking the community for help.

What to record each week

Stage and growth

Record the plant stage, week number, approximate height, and any visible changes.

Environment

Note temperature, humidity, light schedule, airflow changes, and unusual weather effects.

Water and nutrients

Record when you watered, the nutrients used, and how the plant responded. Use consistent measurements.

Mistakes and fixes

Write down problems honestly, the action taken, and the result. This is often the most valuable part of the diary.

Use consistent photos

Take a whole-plant photo and close-ups of important changes from similar angles and lighting. Avoid showing faces, windows, addresses, or other identifying details. Photos are most useful when paired with notes about the same date.

A practical weekly entry

  • Date, stage, and week number
  • Height and general appearance
  • Temperature and relative humidity range
  • Watering and nutrient notes
  • Pest or leaf observations
  • Actions taken and what to check next week

How to use GrownMT diaries

Create an account, open the Diaries area, and start a diary with a clear title, stage, growing medium, and optional media. Add regular updates instead of creating disconnected records. Read How to Use Grown.MT for privacy and community guidance.

Plan for each stage

Start with the seedling care basics, prepare for the flowering stage, and use the common problems guide when an entry reveals a warning sign.