Root health: the foundation for strong plants

Root health is the foundation for successful cannabis cultivation:

**Root zone basics:**

*Root functions:*

- Nutrient uptake from substrate

- Water uptake and transport

- Oxygen supply to the plant

- Stability and anchoring

- Hormone production

*Healthy root characteristics:*

- White to cream colour

- Firm, fleshy structure

- Pleasant, earthy odour

- Strong branching

- Active growth

*Sick root signs:*

- Brown or black discolouration

- Slimy, soft texture

- Foul odour

- Little branching

- Stagnant growth

**Root care in various media:**

*Soil:*

- Drainage crucial

- Airy substrate mix

- Moderate moisture

- Organic matter beneficial

- Utilise mycorrhizal symbiosis

*Coco:*

- More frequent watering

- Supplement Cal-Mag

- pH stability important

- Avoid salt build-up

- Regular irrigation

*Hydro:*

- Water closure is critical

- Continuous aeration

- Temperature control

- Sterile conditions

- Nutrient solution change

**Oxygen supply:**

*Why oxygen is critical:*

- Enable root respiration

- Prevent anaerobic bacteria

- Optimise nutrient uptake

- Avoid root rot

- Promote a healthy microbiome

*Aeration methods:*

- Drainage layer in pots

- Perlite in the substrate

- Air stones in Hydro

- Fabric Pots

- Optimise substrate choice

*Avoid overwatering:*

- Use finger test

- Check pot weight

- Monitor drainage

- Adjust watering intervals

- Never leave the root zone permanently wet

**Temperature management:**

*Optimal root temperatures:*

- Soil: 18-22°C

- Coco: 19-23°C

- Hydro: 18-20°C

- DWC: 16-20°C (cooler due to oxygen)

*Temperature control:*

- Insulate reservoirs

- Chiller for hydro systems

- Pot insulation for extreme temperatures

- Heating mats for cold environments

- Use substrate thermometers

**Nutrient optimisation:**

*Root Zone pH:*

- Soil: 6.0-7.0

- Coco: 5.8-6.2

- Hydro: 5.5-6.0

- Measure and adjust regularly

- minimise pH fluctuations

*EC management:*

- Avoid over-fertilisation

- Prevent salt build-up

- Flushing in case of problems

- Check run-off EC

- Gradual adjustment

*Beneficial Supplements:*

- Mycorrhizal Fungi

- Beneficial Bacteria

- Fulvic/Humic Acids

- Vitamin B1 (Thiamine)

- Seaweed extracts

**Recognising root problems:**

*Pythium (root rot):*

- Brown, slimy roots

- Foul odour

- Wilting leaves despite moist substrate

- Slow growth

- Immediate treatment necessary

*Root bound (pot too small):*

- Roots grow in circles

- Very rapid drying out

- Slowed growth

- Nutrient deficiencies

- Repotting necessary

*Nutrient burn on roots:*

- Brown root tips

- Overfertilisation as cause

- EC values too high

- Rinsing with pH-corrected water

- Reduce fertiliser concentration

**Treatment of root problems:**

*Pythium treatment:*

- Remove affected roots

- H2O2 rinse (3% solution)

- Add beneficial bacteria

- Optimise environment