Outdoor grow: selection and use of pest nets

## Introduction

When growing cannabis outdoors, plants are exposed to numerous pests that can significantly affect growth and yield. The use of pest netting is an effective way to keep insects, birds and other unwanted visitors at bay. In this guide, you will learn how to select, install and maintain suitable netting to provide optimum protection for your cannabis plants.

## Choosing the right netting material

Choosing the right material is crucial for the effectiveness and longevity of the pest netting. The following materials are commonly used:

- **Polyethylene (PE):**

- Advantages:**

- UV-resistant and durable

- Lightweight and flexible

- Resistant to weather influences

- Disadvantages:**

- Can become brittle in strong sunlight

- Polypropylene (PP):**

- Advantages:**

- High tear resistance

- Good chemical resistance

- Low weight

- Disadvantages:**

- Less UV-resistant than PE

- **Metal nets (galvanized steel):**

- Advantages:**

- Very robust and durable

- High resistance to rodents

- Disadvantages:**

- Heavier and less flexible

- Can rust if the coating is damaged

For outdoor cannabis cultivation, UV-resistant polyethylene netting is usually recommended as it offers a good balance between flexibility, durability and protection.

## Determining the net size and mesh size

The size of the netting and the mesh size should be adapted to the specific pests that occur in your region:

- **Insects (e.g. aphids, whiteflies):**

- Recommended mesh size:** 0.6-0.8 mm

- Birds (e.g. sparrows, blackbirds):**

- Recommended mesh size:** 20-25 mm

- Small mammals (e.g. mice):**

- Recommended mesh size:** 5-10 mm

The mesh size should be selected so that the entire plant is covered, including a safety distance of around 30 cm, to prevent the leaves from leaning against the mesh, as pests could otherwise reach the plant through the mesh.

## Installation of the pest nets

Correct installation is crucial for the effectiveness of the net:

1. **Frame construction:**

- Build a sturdy frame of wood, metal or PVC pipe around the growing area.

- Make sure that the frame is high enough not to hinder the growth of the plants.

2 **Fixing the net:**

- Stretch the net tightly over the frame to prevent sagging.

- Secure the net to the frame using cable ties, clips or special net holders.

- Make sure that there are no gaps between the net and the ground through which pests could enter.

3 **Access options:**

- Integrate a lockable opening or door to allow maintenance work to be carried out on the plants.

- Make sure that this opening also closes tightly when it is not in use.

## Maintenance and care of the nets

Regular maintenance increases the service life of the net and ensures continuous protection:

- **Inspection:**

- Check the net weekly for tears, holes or other damage.

- Pay particular attention to the attachment points and seams.

- Cleaning:**

- Regularly remove leaves, dirt and other debris from the net so as not to impair air circulation.

- If necessary, the net can be cleaned with mild soapy water and then rinsed thoroughly.

- Repair:**

- Smaller tears can be repaired with special mesh repair tape or by sewing.

- In the event of major damage, the affected segment should be replaced.

- Storage:**

- After the growing season, store the net dry and clean in a cool, dark place to prevent material fatigue.

## Conclusion

The use of pest netting in outdoor cannabis cultivation is an effective method of protecting plants from various pests. By carefully selecting the material, adjusting the mesh size to the target pests, professional installation and regular maintenance, you can significantly improve the health and yield of your cannabis plants.

## Pro Tips

- Choose UV-resistant nets for longer durability.

- Adapt the mesh size to the specific pests in your region.

- Make sure that the net is taut to avoid sagging.

- Check the net regularly for damage and repair it immediately.

- Store the net dry and clean after the season to extend its service life.