Are commercial polytunnels a good investment?
Picture yourself running a small market garden outside Hereford. Rain has flattened the lettuce you planned to harvest for Saturday’s stall, and another tray of seedlings is waiting for ground dry enough to plant. You’re looking at commercialpolytunnels because losing another week means losing sales.
Are they a good investment? Yes, if the extra crops you sell cover the structure, running costs and your time. If customers already leave your stall without buying everything you’ve grown, shelter alone won’t fix the business.
The question starts with those lettuce beds.
What would a polytunnel change?
Outside, rain lands on the lettuce. Under the metal frame’s polythene sheet, it stays off the beds and warmth gathers inside. Your Hereford sowing calendar has more room in it because you’re less dependent on the ground outside drying out.
February still has February’s daylight. Walk into an unheated tunnel on a bright afternoon and the warmth feels promising, but growth slows with those short days. Come back after dark. It gets cold.
Could Saturday’s lettuce be ready more reliably? That’s part of the value of commercial polytunnels: more say over when you plant and harvest. Tomatoes could follow in those beds, provided the lettuce is cleared before the next crop needs its space.
Will you sell enough extra produce?
Start with last Saturday’s takings.
Did someone ask for lettuce after the last bag sold? There’s demand you couldn’t meet. Lettuce left wilting in the crate tells another story. Perhaps you harvested too much, or need somewhere else to sell it.
Put a buyer beside each extra crop on paper before looking at commercial polytunnels. For the Hereford café, that means asking about a regular salad order. An empty square metre doesn’t buy anything; someone has to want what grows there.
And interest isn’t an order. Leave space in those figures for crops that fail under cover, rather than treating the café conversation as money already earned.
We can’t tell you what your customers will buy next April. Your sales records give you a firmer starting point than somebody else’s harvest photographs.
What do commercial polytunnels cost?
There isn’t an honest price for your Hereford site without a size, specification and installation quote. A frame advertised online also needs checking against the cover, doors and delivery you expect to receive.
Ask for a written total covering the structure and installation, with VAT clearly shown. Then price the work around it: bringing water to the beds, preparing the ground and getting harvested lettuce back to your packing area.
Those details change the investment. A tap beside the proposed site is a different starting point from a water supply across the holding.
For commercial polytunnels, compare quotes against the same dimensions and equipment. Otherwise, the cheaper total might buy you a smaller growing area or leave you fitting the doors yourself.
Should you install it yourself?
Doing the work yourself saves the installation charge. It also takes you away from sowing, harvesting and selling.
On the Hereford plot, check the supplier’s assembly instructions before deciding. Ask how many people the job needs and how long installation takes for that particular model. Covering a large frame needs suitable weather and enough hands to control the sheet.
Paying an installer suits a grower whose available hours are already spoken for. Self-installation suits someone with the equipment, help and practical ability to follow the specification.
Neither option removes the need to assess the ground. With commercial polytunnels, anchoring and exposure deserve attention before an order, especially if your proposed position catches the wind.
What work comes after installation?
Rain on the polythene roof won’t reach a thirsty lettuce bed. The water now has to come from you.
Before the first lettuce goes in, the irrigation needs to be ready. After that, someone has to check it’s delivering water to the crop. Meanwhile, you’re loading the van for Hereford market and a bright morning is warming the tunnel. Its vents need attention too.
Who opens it? Who checks the water when you’re away?
Commercial polytunnels also need money kept aside for repairs and eventual cover replacement. Ask the supplier about the specified cover’s expected service life and warranty conditions. Nobody can give you an exact replacement date for your site.
Record those costs alongside your growing time. Extra sales look less impressive when they require hours you haven’t counted.
How do you judge the payback?
Use profit from the additional crops, rather than their full selling price.
For your Hereford lettuce, subtract the extra seed, packaging and water costs from expected sales, then allow for paid help and your own labour. The amount left contributes towards recovering the installation cost.
Divide that initial cost by the annual contribution. That gives you a simple payback estimate, before finance costs or tax.
Now put a disappointing lettuce harvest into the calculation. Does the payback still hold? Commercial polytunnels that need every bed to deliver the planned crop leave little room for a difficult season.
What should you do next?
Take your Hereford sales book and mark the weeks when lettuce demand exceeded supply. Use those gaps to request a fully itemised quote for a tunnel sized to meet them.Get in touch if you’d like to discuss the options with us.
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