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THC Living Plant Atlas system
Environment Overlay
Coupled whole-plant environment overlay for PPFD, DLI, photoperiod, CO2, temperature, humidity, VPD, airflow, leaf energy balance, canopy light acclimation, water, root-zone supply, nutrients, pH, EC, and interacting limitations.
10 structured lessons6 learning goals19 indexed topics
System progress
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Next unfinished lessonLight distribution
Continue learningConnected biology
This system does not work alone.
Environmental variables act through plant structures and processes, so measurements should always be interpreted with plant stage and biological response.
Follow the connection
Root SystemRoot architecture, root-tip growth zones, lateral-root initiation, root hairs, rhizosphere exchange, radial water transport, aquaporins, oxygen availability, water and nutrient uptake, microbiomes, exudates, mycorrhizal interfaces, and root stress.LeavesLeaf tissue anatomy, morphogenesis, leaflet complexity, photosynthesis, stomata, transpiration, leaf age, energy balance, inspection, and observation-first symptom interpretation.FlowersFemale flower anatomy, condensed inflorescence architecture, reproductive phytomers, floral meristems, bracts, ovary and ovule, stigmas, photoperiod-driven shoot-apex reorganization, pollination, maturation, senescence, trichome development, and disease-risk inspection.Diagnostic OverlayObservation-first diagnostic overlay for symptom location and progression, environmental and root-zone context, nutrient tissue analysis, root/crown biotic-versus-abiotic clues, senescence, pest and pathogen evidence, differential diagnosis, evidence weighting, and confirmatory testing.
Developmental context
Measure or record with it
- PPFD
- Leaf and air temperature
- Relative humidity
- VPD
- CO2
- Airflow
- Root-zone moisture
- pH
- EC
Interactive visual lab
Environment Relationship Lab
The plant experiences a coupled environment. Light changes leaf energy load; temperature and humidity shape evaporative demand; airflow alters boundary layers; root water supply must support the canopy response.
Select one variable
VPD
VPD represents the vapor-pressure difference driving transpiration. It is a derived relationship, not a standalone environmental knob.
Directly connect the interpretation toLeaf temperatureRelative humidityRoot water supplyAirflow
System ruleA change that improves one number can still worsen plant response if the connected variables cannot support it.
Learning objectives
What this system should teach
Visual curriculum
Environment Overlay lesson sequence
Each lesson is structured around a visual reference so the Atlas can replace dry text-first learning with observation and diagrams.Lesson 01
Light distribution
Map high- and low-light zones across the canopy and connect PPFD distribution to leaf position and canopy architecture.
Open visual lessonCanopy PPFD overlay
Lesson 02
Temperature & humidity
See how air temperature and relative humidity combine to shape evaporative demand rather than acting as independent numbers.
Open visual lessonTemperature/RH interaction overlay
Lesson 03
VPD & transpiration
Connect vapor pressure deficit to stomatal behavior, leaf temperature, water movement, and changing plant demand.
Open visual lessonWhole-plant VPD flow
Lesson 04
Airflow & boundary layer
Visualize air movement around leaves and the still-air boundary layer that influences heat and vapor exchange.
Open visual lessonLeaf boundary-layer animation
Lesson 05
Root-zone interaction
Overlay media moisture, oxygen, pH, EC, root temperature, and atmospheric demand to show why plant response depends on the whole system.
Open visual lessonEnvironment-to-root interaction map
Lesson 06
Leaf temperature vs air temperature
Compare measured leaf and air temperatures and connect their difference to radiation, airflow, transpiration, humidity, and the vapor-pressure gradient at the leaf surface.
Open visual lessonLeaf-versus-air temperature and vapor-pressure comparison
Lesson 07
CO2 diffusion & photosynthetic response
Trace carbon dioxide from bulk air through the leaf boundary layer and stomata to photosynthetic tissues, then compare Cannabis responses to changing CO2 while keeping cultivar, PPFD, temperature, nutrient, and measurement conditions visible.
Open visual lessonCO2 diffusion pathway and photosynthetic-response overlay
Lesson 08
PPFD, DLI & photoperiod
Separate instantaneous photon flux density, daily integrated photon dose, and daylength or nightlength signaling so a plant can receive similar daily light totals under different temporal patterns that are not biologically identical.
Open visual lessonPPFD versus DLI versus photoperiod comparison dashboard
Lesson 09
Light acclimation & canopy position
Compare leaves developed under different local photon environments to show how photosynthetic traits can acclimate across canopy positions, while avoiding the assumption that one leaf response directly predicts whole-plant yield or flower quality.
Open visual lessonCanopy-position light acclimation and leaf-response map
Lesson 10
Coupled environmental limits
Explore how light, CO2, temperature, VPD, airflow, and root-zone supply can constrain one another so increasing one resource does not guarantee a proportional response when another process becomes limiting.
Open visual lessonInteractive coupled-environment limitation network
Reference index
Topics connected to this system
PPFDDLIPhotoperiodCO2 diffusionPhotosynthetic responseLight acclimationCanopy positionTemperatureHumidityVPDAirflowBoundary layerLeaf temperatureWaterRoot-zone oxygenNutrientspHECCoupled limitations