Read the Field Manual

RTFM — Read the Field Manual, cannabis pH EC water nutrients diagnostic guide

Before you add anything A practical diagnostic guide for pH, EC, water, nutrients, root-zone oxygen and plant symptoms Do not diagnose the leaf before you understand the system. Most plant problems do not begin with a missing bottle. They begin when part of the cultivation system moves out of balance: source water, alkalinity, pH, EC, […]

Root system management

Cannabis root system management

Root system management The root system is the cornerstone of cannabis cultivation, serving as the plant’s lifeline for water absorption, nutrient uptake, and overall health. Proper root care ensures strong growth, maximised yields, and resilience against stressors. This guide delves into root interaction with substrates, common problems, and best practices to maintain optimal root health. […]

Exploring the role of O₂, H₂, and O₃

Oxygen, hydrogen and ozone in cannabis cultivation

Exploring the role of O₂, H₂, and O₃ in Cannabis cultivation Certain elements and compounds like oxygen (O₂), hydrogen (H₂), and ozone (O₃) can play significant roles in cannabis cultivation. While not essential nutrients like nitrogen or potassium, they have unique applications and benefits when used thoughtfully. Here’s an overview of how they can impact […]

Hydroponic systems

Hydroponic systems for cannabis cultivation

Hydroponic systems Elevating cannabis cultivation Hydroponics is a soil-free growing method where cannabis plants are nurtured in nutrient-rich water. Instead of traditional soil, roots are supported in an inert medium or even suspended in air, while nutrient solutions are delivered directly to them. This approach eliminates many traditional cultivation challenges and optimises efficiency for faster […]

pH and EC

pH and EC management for cannabis cultivation

pH and EC nutrient management essentials What are pH and EC? pH (Potential of Hydrogen) Definition Measures the acidity or alkalinity of a solution, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral. Role Determines the availability of nutrients to your plants. Importance Out-of-range pH levels can block nutrient absorption, causing […]

Watering

Watering cannabis — phase by phase guide

Watering phase-by-phase essentials Watering cannabis plants isn’t just about keeping them hydrated—it’s about creating the perfect environment for nutrient uptake, oxygenation, and root health. Here’s why watering is so critical: Hydration for growth Plants need water for photosynthesis, nutrient transport, and overall metabolism. Nutrient delivery Water acts as a vehicle to transport essential nutrients to […]

Nutrient management and fertiliser use

Cannabis nutrient management and fertiliser use

Nutrient management and fertiliser use in cannabis cultivation Understanding Cannabis nutrients Macronutrients Cannabis requires three primary nutrients to grow healthily. These macronutrients are crucial for different stages of growth. Calcium Ca Role Strengthens cell walls, promoting robust structure. Magnesium Mg Role Central to chlorophyll production and photosynthesis. Iron Fe Role Essential for enzyme function and […]

Advanced Cannabis training techniques

Advanced cannabis training techniques LST HST ScrOG

Advanced Cannabis training techniques in cannabis cultivation Proper training techniques, such as Low-Stress Training (LST) and High-Stress Training (HST), are critical tools for cultivators aiming to optimise canopy structure, enhance yields, and improve plant health. Here, we cover methods suited to all levels of expertise, tailoring techniques to each growth phase and explaining their impact […]

Phases of Cannabis growth

Cannabis growth phases overview — seed to harvest

Phases of Cannabis growth The growth of a cannabis plant can be divided into several key phases, each with its own unique needs, challenges, and opportunities. From the moment you plant the seed until the time you harvest the final buds, understanding these phases is crucial for achieving healthy plants and maximizing your yield. Germination […]

Late Vegetation

Cannabis late vegetation phase

Late Vegetation The Late Vegetation Phase is the final stage before cannabis transitions into pre-flowering. During this phase, the plant solidifies its structure and stores energy to prepare for the flowering process. This stage requires precise training, optimal nutrient adjustments, and environmental consistency. Environmental and medium-specific parameters Parameter Ideal range Water pH (Soil) 6.0–6.5 Water […]

LIBERA HERBA Cannabis VADEMECUM — Early Access

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LIBERA HERBA Cannabis VADEMECUM — Early Access

Join early.

Keep the
archive open.

The VADEMECUM is not just a book anymore. It is becoming a living archive of guides, tools, notes and practical plant knowledge.

Free member access. Join early. Keep the archive open.

The VADEMECUM is becoming a living archive of practical plant knowledge.

Free member access.