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THC Living Plant Atlas system
Diagnostic Overlay
Observation-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.
10 structured lessons6 learning goals18 indexed topics
System progress
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Next unfinished lessonSymptom location
Continue learningConnected biology
This system does not work alone.
Diagnosis is a whole-plant reasoning process that combines where symptoms occur with measurements, stage, history, and competing explanations.
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.Environment OverlayCoupled 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.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.
Developmental context
Measure or record with it
- Symptom location
- Pattern
- Progression
- Plant stage
- Root-zone data
- Environment data
- Recent actions
Interactive visual lab
Observation-First Diagnostic Lab
The goal is not to guess a deficiency from a picture. Build an evidence profile first, then rank plausible causes and decide what measurement or inspection would discriminate between them.
Location
Pattern
Progression
Moisture context
Learning objectives
What this system should teach
Visual curriculum
Diagnostic 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
Symptom location
Mark whether the first visible problem begins on old leaves, new growth, upper canopy, lower canopy, one branch, roots, or the whole plant.
Open visual lessonWhole-plant symptom locator
Lesson 02
Pattern description
Describe uniform, interveinal, marginal, spotted, tip-focused, twisted, wilted, or asymmetric symptoms before assigning cause.
Open visual lessonPattern vocabulary panel
Lesson 03
Progression over time
Compare sudden, gradual, stable, spreading, and recovering patterns and record what changed before symptoms appeared.
Open visual lessonSymptom progression timeline
Lesson 04
Measurement context
Bring pH, EC, substrate moisture, temperature, RH, VPD, PPFD, and feed/water history into the same diagnostic record.
Open visual lessonDiagnostic measurement dashboard
Lesson 05
Differential workflow
Rank plausible environmental, root-zone, nutritional, pest, pathogen, and physical explanations and use new observations to narrow them.
Open visual lessonObservation-to-differential decision map
Lesson 06
Genotype × environment context
Use cultivar baselines, repeatability, developmental stage, environment, and plant-to-plant comparison to distinguish a stable phenotype from a newly emerging stress or disease pattern.
Open visual lessonGenotype-by-environment diagnostic comparison matrix
Lesson 07
Nutrient symptom progression & tissue analysis
Pair symptom location and progression with strategic tissue analysis to test nutrient hypotheses, recognizing that visual onset, tissue concentration, antagonisms, developmental stage, and published deficiency ranges do not always align as one simple threshold.
Open visual lessonSymptom progression plus leaf-tissue analysis decision panel
Lesson 08
Root & crown: biotic vs abiotic clues
Compare discoloration, lesions, root loss, wilting, stunting, odor, saturation history, oxygen conditions, and pathogen evidence so root or crown decline is not assigned to disease or overwatering from appearance alone.
Open visual lessonRoot-and-crown biotic versus abiotic differential matrix
Lesson 09
Senescence vs disorder
Separate expected age- and flowering-associated tissue senescence from atypical nutrient, root-zone, pathogen, or environmental decline by using developmental stage, distribution, rate of change, and healthy comparison plants.
Open visual lessonNormal senescence versus disorder progression comparison
Lesson 10
Evidence weighting & confirmatory testing
Treat a visual pattern as a hypothesis generator, rank evidence by specificity and reliability, and choose the next discriminating observation, measurement, microscopy check, tissue test, or pathogen assay before escalating a diagnosis.
Open visual lessonDiagnostic evidence-weighting and confirmatory-test workflow
Reference index
Topics connected to this system
Symptom locationPattern descriptionProgressionMeasurement contextDifferential diagnosisGenotype × environmentTissue analysisNutrient disordersRoot symptomsCrown symptomsBiotic vs abiotic cluesSenescencePest signsMold signsEvidence weightingMicroscopyPathogen assaysConfirmatory testing