Polytunnels are a great asset and can be more useful than a green house for growing Cucumbers, early Dwarf Beans etc etc but make sure that you have ventilation panels at each end. This will ensure a good through draft when open to keep the air clean and fresh and minimise mildew etc in winter. Some of the proffessional tunels which are really long have fans in them to draw the air through, but at 25ft you should be OK.

Keep the plastic cover clean as it will go dull which acts a shade, in winter when light is really neeeded it will need a wash. I use my hose end feeder filled with detergent. Although I cant get right on the top with my soft broom, the detergent does loosen the alge etc. Have a look at www.superspray.co.uk yopu can use it for applying liquid feeds too and also the Nemaslug product for control of slugs.

You'll easily fill this polytunnel once you get going!