Left Continue shopping
Your Order

You have no items in your cart

Cloches and Growing Tunnels. Fibreglass Rods, Clips and Clamps

We supply eight different sizes of Fibreglass Rods, plus Eyehooks and Butterfly clips for fastening crop covers and for the construction of cloches and growing tunnels.

Mikroclima is the ideal cover for low cost cloche systems, increasing soil temperatures and protecting crops from cold winds, heavy rain, hail, frosts, birds and insects.
Because Mikroclima breathes, the problems of extreme heat and condensation that is experienced under plastic can be avoided.

A simple cloche may be made by forming hoops from wire, p.v.c. pipe, split cane or fibreglass rod.

Fibreglass rod is the ideal material for this purpose as it is strong, flexible, very smooth and long lasting. 
Holes can be drilled into timber pegs or the timber sides of a raised garden to support the rods firmly. 
Mikroclima is draped over the hoops, gathered evenly at the ends and tied to eyehooks or end stakes or pegs. 
Plastic butterfly clips can then be used to secure the Mikroclima to nails or hooks in the side pegs or timber framing.

Biomglia Insect Mesh - for when protection from tiny insects is the priority.

Plastic Coated Fibreglass Rods for Cloches - Available in eight standard

sizes.  Buy Now!

1.2m x 4.5mm dia. Yellow - to span a 0.5 - 0.7m width - space 0.4 - 0.8m apart.
1.5m x 6.5mm dia. Black - to span a 0.9m width - space 0.6m - 1.2m apart.
1.5m x 6.5mm dia. Black - to span a 1m width - space 0.8m - 1.5m apart.
2.1m x 8mm dia. Yellow - to span a 1.2m width - space 1.0m - 1.8m apart.
2.4m x 9mm dia. Yellow - to span a 1.4m width - space 1.2m - 2.0m apart.
2.8m x 11mm dia. Yellow - to span a 1.7m width - space 1.4m - 2.2m apart.
3.1m x 11mm dia. Yellow - to span a 1.9m width - space 1.5m - 2.4m apart.
3.6m x 13mm dia.  Yellow - to span a 2.2m width - space 1.6m - 2.6m apart.
4.1m x 13mm dia. Yellow - to span a 2.5m width - space 1.8m - 2.8m apart.

Fibreglass rods 1.7m and longer are too long for Rural Delivery Contractors - please advise a 'town' address or Aramex depot delivery.

Fibreglass rods longer than 2.4m are too long to be sent by the courier and need to be shipped using a freight company - Mainfreight. For 2.8m, 3.1m, 3.6m or 4.1m rods - please email for a quote including freight.

For best access and performance perfect semi-circles should be formed with the rods - achieved by using widths as above, thus ensuring that the cover can be pulled tight with even tension at both the top and the sides. Rods may be shortened by up to 20% but should not be bent - too much - tighter than a perfect semicircle.

Alternatively, excellent growing conditions can be created by making a half cloche up against a north facing fence or wall.

The ideal dimensions for the construction of a cloche using 3m x 7m Mikroclima and 3 x 3.1m fibreglass rods is:
1.9m width, 2m between rods and 1.1m from rods to end pegs.

Download Polynet's 8 page pdf Product Information and Price Catalogue here!


Plastic Butterfly clips - RJ Reid type - are available singularly or in bags of 20, 50 or 100.  Buy Now!

High tensile steel wire Ground Staples - for securing the edges of sheets of Mikroclima or Weedmat.

Available in 2 sizes: 
130mm long - carton of 200 staples or bundle of 20 or 50 staples.     230mm long - carton of 200 staples or bundle of 20 or 50 staples.

EyeHooks - for securing the ends of cloches

NEW! - Clips and clamps - for attaching Mikroclima and other meshes to various sizes of rod or pipe.


Lock Clamps - Easy to install with locking flange to secure tightly. Three sizes available.  Buy Now!
20mm Green Lock Clamp  fits rod or pipe of dia.19mm - 20mm. 16mm Light Blue Lock Clamp  fits rod or pipe of dia.15mm - 16mm. 14mm Orange Lock Clamp fits rod or pipe of dia.13mm -14mm

Double Clip - Blue 8mm for 7mm or 8mm fibreglass rod. Orange 11mm for 10mm fibreglass Rod.  These double clamps have a useful connecting loop.  Buy Now!


New! - Cross Clips for joining rod, pipe or dowel.
Now available in 8mm x 8mm, 8mm x 11m, 11mm x 11mm and 11mm x 16mm. 
Available in packs of 5. Buy Now!

8mm Fibreglass rod available in - 0.8m, 1m, 1.4m, 1.8m & 2m lengths.

16mm Fibreglass rod available in - 1m & 2m lengths.