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Cloches, Growing Tunnels, Fibreglass Rods, Clips & Clamps

We supply Butterfly clips and/or Ground Staples for fastening Mikroclima and offer five different sizes of Fibreglass Rods 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 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.

Fibreglass Cloche Rods - Available in eight standard sizes.  Buy Now!

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 or 4.1m rods - please email for a quote including freight.

1.5m x 5mm dia. to span a 0.9m width - space 0.8m - 1.2m apart - 50mm holes
1.7m x 6.5mm dia. Black Plastic Coated - to span a 1m width - space 0.9m - 1.4m apart.
2.1m x 8mm dia. Yellow Plastic Coated - to span a 1.2m width - space 1.0m - 1.75m apart.
2.4m x 9mm dia. Yellow Plastic Coated - to span a 1.4m width - space 1.2m - 2.0m apart.
2.8m x 8mm dia. to span a 1.7m width - space 1.4m - 2.2m apart.
3.1m x 9mm dia. to span a 1.9m width - space 1.5m - 2.5m apart.
3.6m x 13mm dia. to span a 2.2m width - space 1.8m - 3.0m apart.
4.1m x 13mm dia. Yellow Plastic Coated - to span a 2.5m width - space 2.0m - 3.2m apart.

Polynet 8page  Product/Price Catalogue pdf available here.

Ideally a perfect semi-circle should be formed by the rods - achieved by using widths and hole depths 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 5% but should not be bent 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.



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

Galvanised 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 50 staples.     230mm long - carton of 200 staples or bundle of 50 staples.

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! - EasyA 8mm Connecters for making A frames from 8mm rod, pipe or dowel. Available in packs of 3. Buy Now!

New! - 8mm Cross Joins for joining 8mm rod, pipe or dowel. 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.