Bayliss MK 7 Vent Opener Forest Greenhouses loosen the soil around the

loosen the soil around the base of the plants before using the grate to extract potatoes grown in the ground

This automatic greenhouse window opener is designed to open and close greenhouse windows using solar heat

Capacity 300 litres (66 gallons)

The 3ft 4inch model comes complete with 5 shelves and the 5ft model comes complete with 8 shelves

Species common earthworm known as lobworm

Bayliss MK 7 Vent Opener Forest Greenhouses loosen the soil around theSuitable for use on nearly all greenhouses this Bayliss MK7 is an extremely reliable, British made, automatic vent opener. The bayliss Mk7 vent opener is operated by a stainless steel cylinder containing a mineral wax which expands with heat; this pushes a piston causing the vent to open. As the temperature falls the wax contracts and a strong stainless steel spring closes the opener. Bayliss guarantee their openers for 2 years but if anything should