diseases-mold
Botrytis / Bud Rot
An internal flower rot pattern where bud interiors brown, collapse, or turn mushy before the outside fully shows damage, commonly driven by trapped moisture, dense flowers, and poor airflow in late flower.
Definition
Botrytis / Bud Rot
An internal flower rot pattern where bud interiors brown, collapse, or turn mushy before the outside fully shows damage, commonly driven by trapped moisture, dense flowers, and poor airflow in late flower.
Why this matters: This page exists to separate the strongest match from common lookalikes before intervention.
Symptom checklist
- • Distinct visual patterns affecting leaves, buds, stems, or roots
- • Progression that changes over time rather than remaining static
- • Localized or canopy‑wide distribution depending on the underlying cause
Likely causes
- • An internal flower rot pattern where bud interiors brown, collapse, or turn mushy before the outside fully shows damage, commonly driven by trapped moisture, dense flowers, and poor airflow in late flower.
- • Check whether bruising handling damage is a better fit when symptoms overlap.
Visual reference gallery
Lookalike comparison image for Botrytis / Bud Rot in macro view
Credit: BudCrafter visual-library-v1 handoff
Lookalike comparison image for Botrytis / Bud Rot in macro view
Credit: BudCrafter visual-library-v1 handoff
Diagram showing the typical botrytis / bud rot pattern and confirm cues
Credit: BudCrafter visual-library-v1 handoff
Confirm steps
- • Open the cola gently and inspect the interior for brown, gray, or collapsing tissue hidden beneath intact outer flower
- • Compare suspect flowers against healthy colas to identify internal spread rather than simple bruising
- • Check whether the issue clusters in dense late-flower buds or poorly ventilated zones
- • Look for musty odor, internal collapse, or gray growth rather than only superficial browning
What to do now
- • Remove visibly affected flower and adjacent compromised material
- • Isolate contaminated product from healthy flower or drying material
- • Reduce local humidity pressure and improve airflow through dense flowers
- • Inspect nearby dense colas for hidden internal spread
Prevention
- • Maintain stable environment and irrigation rhythm
- • Inspect plants regularly for early indicators
- • Track feeding, watering, and environmental changes in grow logs
Lookalikes and how to tell
- Bruising Handling Damage: Use compare routing and confirm steps before acting on Bruising Handling Damage.
FAQ
What should I check first for Botrytis / Bud Rot?
Start with the strongest visible cue, where it appears first, and whether the pattern is actively spreading.
What if Botrytis / Bud Rot still overlaps another issue?
Open the compare route if this could also be bud rot vs physical bud browning.
When should I upload photos?
Upload when the pattern is mixed, contradictory, or progressing faster than the current evidence explains.
Reference tables
Botrytis / Bud Rot verification table
| Signal | Why it matters | Next move |
|---|---|---|
| Distinct visual patterns affecting leaves, buds, stems, or roots | Open the cola gently and inspect the interior for brown, gray, or collapsing tissue hidden beneath intact outer flower | Botrytis / Bud Rot |
| Progression that changes over time rather than remaining static | Compare suspect flowers against healthy colas to identify internal spread rather than simple bruising | Botrytis / Bud Rot |
| Localized or canopy‑wide distribution depending on the underlying cause | Check whether the issue clusters in dense late-flower buds or poorly ventilated zones | Botrytis / Bud Rot |
| botrytis bud rot requires formed floral tissue (seedling) | Rule out the contradiction before intervention. | lookalike check |
Source: BudCrafter release manifest crosscheck
Stage notes
- Seedling: If symptoms begin in seedlings, verify progression before making aggressive changes.
- Veg: During vegetative growth, confirm whether the pattern is spreading or staying isolated by zone.
- Flower: In flower, isolate suspect tissue and verify spread direction before removing or treating broad sections.
- Drying: For post-harvest or storage-adjacent patterns, document environment, handling, and spread pattern immediately.
Medium notes
- Soil: Use recent dry-back rhythm, runoff behavior, and tissue age to separate root-zone and foliar causes.
- Coco: Check feed frequency, EC drift, and moisture distribution before assuming a primary tissue deficiency.
- Hydro: High humidity and splash behavior can make foliar disease look worse; inspect tissue and spread pattern directly.
- AutoPot: Check valve behavior, line balance, and media moisture uniformity before escalating action.
- Living soil: Favor observation and stability checks before abrupt chemistry changes in biologically active media.
What to measure
- • Document spread pattern, earliest affected tissue, and recent changes before intervention.
- • Use photos, timestamps, and zone notes to separate one-off damage from active progression.
- • If the pattern is mixed, use compare routing before making chemistry or sanitation changes.
Evidence and references
Official docs
- • Frontiers Review: Postharvest operations of Cannabis and their effect on cannabinoid content (Post-harvest operations)
- • Cannabis post-harvest processing and quality outcomes (Methods and quality outcomes)
- • Drying method effects on cannabinoid and terpene profile (Drying outcomes)
- • AOAC guidance: Validation of Microbiological Methods for Cannabis (Validation and controls)
Community methods
- • No transcript-backed method note is attached to this section yet.
Related guides
Glossary
BudGuard provides educational support only, not diagnosis.
Photo recommendations
- • Take one macro image of the strongest visible cue.
- • Take one mid-range image showing distribution across the tissue or branch.
- • Take one whole-plant or canopy image to show where the pattern starts.