Diseases

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  Manolo MJF
• 11-Sep-2025

The worst cannabis pests are spider mites, thrips and powdery mildew. Check quick check-lists: first symptoms, what works in veg, what in late flower, and what you should never spray on buds.

• 
  Manolo MJF
• 11-Sep-2025

More and more growers use Cal-Mag when growing under LEDs and with filtered water. But does every plant really need it? Find out when calcium and magnesium supplementation is a lifesaver and when it can do more harm than good.

• 
  Manolo MJF
• 05-Sep-2025

How to read cannabis leaves in coco, DWC/RDWC, aeroponics, rockwool and other media. pH/EC ranges, the most common symptoms (Ca/Mg, K, Fe…), quick fixes and “false alarms” (root oxygen, solution temperature, spray nozzles). Tables + downloadable charts.

• 
  Manolo MJF
• 05-Sep-2025

A complete guide to leaf symptoms in cannabis: nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum, chlorine, sodium, and toxicities. Nutrient availability vs pH table, diagnostic checklist, quick fixes, and “false alarms” (overwatering, wind, light, pests).

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  Manolo MJF
• 01-Sep-2025

Foxtailing in cannabis: when it’s a light/heat problem vs. just the cultivar. How to stop it in 24–48 h and protect density, flavor, and resin.

• 
  Manolo MJF
• 01-Sep-2025

Set the ideal LED-to-canopy distance: starter tables, light burn vs deficiencies, when to raise or dim, plus PPFD/DLI tips for an even, stress-free canopy.

• 
  Manolo MJF
• 01-Sep-2025

Where do hermaphrodites and “nanners” in flower come from? Most common causes (light leaks, stress, genetics), simple prevention (dark test, timer, T/RH), how to identify on the plant, and a rescue plan: removal, misting, isolation, when to chop and when to finish with minimal seeds.

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  Manolo MJF
• 23-Aug-2025

A practical, step-by-step guide to diagnosing leaf changes in cannabis. Learn how to spot different leaf spots, colors, causes of disease, deficiencies, pests, and unwanted growing conditions with clear explanations. Keywords: cannabis leaf problem guide, diagnose leaf spots.

• 
  Manolo MJF
• 23-Aug-2025

A detailed calendar of cannabis diseases in a temperate climate – your monthly guide to outdoor and greenhouse threats. Learn when to expect mold, rot, and pests, how to protect your crop, and keep harvests healthy all season long. Outdoor mould calendar and cannabis disease season made simple for growers.

• 
  Manolo MJF
• 23-Aug-2025

Learn about the real risks of algae and biofilm in hydroponic systems. Discover how these hidden threats disrupt water quality, sensor readings, and plant health—even if they don’t cause direct disease. Practical tips from a seasoned grower for managing “algae hydroponics” and “biofilm in the tank

• 
  Manolo MJF
• 23-Aug-2025

Discover how to identify, prevent, and manage collar/crown rot in cannabis (crown rot cannabis). Learn about the key symptoms near the soil line, the impact of watering routines, and related root diseases that threaten healthy grows. Essential knowledge for growers who want to avoid stem base rot and maintain vigorous plants.

• 
  Manolo MJF
• 23-Aug-2025

Learn how to recognize TMV-like (Tobacco Mosaic Virus-like) symptoms in cannabis, avoid common misdiagnoses, and distinguish viral mosaic from nutrient deficiencies and phytotoxicity. Find practical answers to essential grower questions and keep your crop safe from mosaic viruses.