Pot sizes and substrate selection for indoor cultivation

Introduction

When growing cannabis indoors, choosing the right pot size and suitable substrate is crucial for plant growth. Different growth phases require different approaches to create the optimal environment for the plants.

Pot sizes for indoor cultivation

The pot size depends on the planned final size of the plant and the cultivation method.

• Seedling phase**: For the seedling phase, small pots with a volume of around 100-200 ml are ideal to ensure better moisture control.
• Vegetative phase**: In the vegetative phase, switch to pots with a volume of 5-10 liters. This allows the root system to develop optimally.
• Flowering phase**: For the flowering phase, larger pots with a volume of 15-20 liters are recommended to provide the plant with sufficient nutrients and space for the roots to spread.

Substrate selection

The choice of substrate has a significant influence on nutrient uptake and plant growth.

• Soil**: Easy handling and natural nutrient supply. Recommended for beginners. Ensure a loose structure and good drainage.
• Coco-Coir: Provides high moisture retention and aeration. Ideal for advanced growers as it allows for precise nutrient control.
• Perlite/expanded clay**: Often used in combination with other substrates to improve drainage.

Prepare soil

Preparing the soil is an essential step in creating optimal growing conditions.

• adjust the pH value**: The pH should be between 6.0-7.0 for soil and between 5.8-6.0 for coco. This can be adjusted by adding lime or sulphur.

2 Nutrient supply: Depending on the substrate, additional nutrients may need to be added. Soil often already contains nutrients, while coco requires a targeted addition of nutrients.

• ensure drainage**: Make sure there are sufficient drainage holes in the pot and a layer of perlite or expanded clay at the bottom to prevent waterlogging.

Planting the plants

When planting, it is important to place the plants carefully in the prepared substrate without damaging the roots. The root ball should be well covered with the substrate and the plant should stand firmly in the pot.

Care

• Watering: Water as soon as the top layer of soil is dry to prevent root rot.
• Light: Ensure that the plants receive sufficient light, depending on the growth phase.

Conclusion

The right combination of pot size and substrate supports the healthy growth of your cannabis plants. Pay attention to the pH values and good drainage to achieve optimal results.

Pro Tips

• Use breathable pots for better root aeration.
• Do not overwater your plants.
• Choose substrates according to your level of experience.
• Pay attention to the pH value of the substrate.
• Check the weight of the pot regularly to estimate the water requirement.