Entry from British & World English dictionary
An elongated polythene-covered frame under which seedlings or other plants are grown outdoors.
- Over the past three years, the business has expanded into strawberries, as well, which are grown in polytunnels in order to be ready out of season, before their outdoor plants mature.
- The mushrooms, which literally grow overnight in four polytunnels, are sold to supermarket chains through a wholesaler in Trawden.
- The seeds were sown, germinated and grown in the polytunnel for approximately three weeks on average.
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