How to Build a Fruit Cage in a Weekend

A step-by-step guide using the Knowle Nets Build‑Your‑Own Fruit Cage Frame System

If you’ve ever grown soft fruit at home you’ll know how quickly birds can undo months of careful tending and anticipation - just as the fruit is ready to enjoy the birds make their move and can strip a bush bare in just a few hours!

A well-built fruit cage is the most reliable way to protect strawberries, raspberries, blueberries and currants - without blocking light, rain or airflow - and you don’t need specialist tools or a custom-made structure.

Using the Knowle Nets Build‑Your‑Own Fruit Cage Frame System you can create a strong and versatile fruit cage in just a weekend, tailored exactly to your garden or allotment.

This guide walks you through the entire process, from planning and product selection to construction and long-term maintenance.

Why Choose the Knowle Nets Build‑Your‑Own Fruit Cage Frame?

Knowle Nets’ modular fruit cage system is designed for gardeners who want flexibility, durability and ease of installation. Made from lightweight yet robust aluminium tubing and paired with purpose-designed connectors and netting, the system allows you to build a cage that fits your space precisely.

The key benefits include:

• Modular components – buy only what you need.

• Weather-resistant aluminium frame.

• Fruit cage netting designed specifically to deter birds.

• Easy to adapt, extend or reconfigure in future seasons.

Explore the Build‑Your‑Own Fruit Cage Frame range to see available tubes, connectors and accessories.

Step 1: Plan Your Fruit Cage Layout

Before ordering materials, measure the length, width and height of your growing area. Most walk-in fruit cages need to be between 1.8 and 2.2 metres high to give you comfortable access for pruning, watering and harvesting.

Sketch a simple plan showing the footprint of the cage and where you’d like the door to sit, allowing extra clearance around plants to accommodate growth - they get bigger than you would think!

If you’re unsure how many components you need, the Knowle Nets system makes it easy to calculate quantities based on your layout.

Step 2: Choose Your Knowle Nets Components

To build your DIY fruit cage you’ll need the following core products from the Knowle Nets range:

Frame components

• Aluminium fruit cage tubes to form the main structure.

• Corner connectors (3‑way or 4‑way) Straight connectors or joiners  to extend tube lengths.

• A Door Kit.

Shop Build‑Your‑Own Fruit Cage Frame tubes and connectors.

Netting & fixings

• Fruit cage netting – allow extra for overlaps and the door.

• Net clips or cable ties – for fast, secure fixing.

• Ground pegs or landscape staples – to secure netting at soil level.

View Knowle Nets fruit cage netting options and fixings.

Step 3: Install the Vertical Supports

Mark out the cage footprint and begin installing the vertical posts:

1. Insert vertical tubes 30–40 cm into the ground.

2. Place posts at each corner and every 1.5–2 metres along the sides.

3. Use a spirit level to ensure each pole is upright.

Taking time to align posts accurately will make the rest of the build much easier.

Step 4: Assemble the Top Frame

Connect the horizontal tubes to the tops of the vertical supports using Knowle Nets connectors. This forms the main structural frame.

For walk-in cages, add a central roof ridge to improve strength and prevent netting sagging - check all connectors are secure before moving on.

Step 5: Fit the Fruit Cage Netting

For smaller cages you can use a single piece of soft bird netting -  Drape the netting over the roof first, then work down the sides.

• Pull the net taut without overstretching

• Secure it evenly using net clips or cable ties

• Ensure corners and joins are fully closed

A snug fit with minimal sagging offers the best protection against birds and prevents the risk of birds and wildlife becoming caught up.

For larger cages you will achieve a better fit by using more rigid side netting around the frame - fixed with clips or cable ties - and then apply the roof netting using netting hooks to secure.

Choose fruit cage netting suited to soft fruit protection.

Step 6: Create an Access Door

Access can be simple or more structured:

• Fit a Knowle Nets door kit for convenience.

• Or create an overlapping net opening secured with clips.

The key is ensuring the door closes fully after every use.

Step 7: Secure the Netting at Ground Level

Finish by anchoring the netting securely to the ground:

• Use landscape or netting pegs.

• Weight edges with timber battens, bricks or paving slabs.

This prevents birds from getting underneath and helps stop wind lift in exposed gardens.

Final Checks

Walk around the cage and check:

• No gaps in netting.

• All connectors are tight.

• The door opens and closes smoothly.

Trim excess netting if required.

Ongoing Maintenance Tips

• Check fixings at the start of each growing season.

• Remove leaves from the roof during winter and remove roof net in periods of severe wind or snow.

• Replace damaged netting promptly.

With simple annual maintenance, a DIY fruit cage built using the Knowle Nets Build‑Your‑Own Fruit Cage Frame system can provide reliable crop protection for many years.

With Knowle Nets modular components, you can create a professional-grade solution tailored perfectly to your garden - a satisfying weekend project that pays off in healthier plants, better yields and no fear of losing out to the birds!