At around half the price of glasshouses, polytunnels offer numerous benefits to growers. Used extensively by nurseries and growers to develop their plants and crops in a controlled, uniform way, today's polytunnels are higher and wider than the single-span units supplied 30 years ago. The range now extends from portable temporary units to single- and double-span, through to a full range of multispan/ multilink constructions. In nearly all instances planning permission is required for this type of building.
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