A grow journal (grow diary, grow log) is a running record of one grow: what was planted, when, in what medium and system, under what light and climate, what was fed, what went wrong, and what came out at harvest.
In practice
A useful entry has a date, a photo, the stage, and numbers: air temperature and RH (or VPD), light intensity in µmol/m²/s, feed EC in mS/cm and pH, any runoff readings, and actions taken. The final entries record dry weight, cure notes and, ideally, lab results. Journals from many growers on the same line are the closest thing to field-trial data most cultivars ever get.
On GenetixBay the journal is central: entries are timestamped and tied to the plant's and batch's GB-IDs, documented grows earn rewards, and a member's keeper with a strong journal can be nominated for community breeding. Yield and potency numbers by themselves never earn rewards; documentation does.
Don't confuse with
- Smoke report: the tasting write-up at the end, one part of a journal.
- Breeding records: pollination dates and parent IDs; a breeder's journal includes them.
Relative humidity is the water vapour in air as a percentage of what it could hold at that temperature, so the same RH dries plants differently at different temperatures.Vapour pressure deficit: how much more water vapour the air could hold at its temperature, in kPa; it is the main environmental driver of transpiration.Photosynthetic photon flux density: the number of PAR photons landing on one square metre each second, in µmol/m²/s; the standard measure of light intensity at the canopy.Input EC is the electrical conductivity of the nutrient solution going into the pot or system, in mS/cm, including the base EC of the source water.mS/cm (millisiemens per centimetre) is the standard unit of EC for nutrient solutions; 1 mS/cm equals 1 dS/m and 1,000 µS/cm.pH measures how acidic or alkaline a solution is on a 0–14 scale; in growing it controls nutrient uptake, with soil best near 6.0–7.0 and hydro 5.5–6.5.A GB-ID is GenetixBay's permanent identifier, such as GB-GEN-0001842-6, for a genetic line, landrace, seed batch, plant, cut, grow, harvest, trial or document, so records never get lost or renamed.A smoke report is a grower's or consumer's write-up of how cured flower looks, smells, tastes, burns and reportedly feels, ideally linked to how it was grown.Bay Trials are GenetixBay's member-run controlled grow experiments that test growing claims side by side and publish the results openly.The weight of cannabis after drying (and usually trimming), the basis growers use for yield; it is typically about 20-25% of trimmed wet weight.
