Bed, topped with c. A 10ft wide polytunnel is a popular choice for home gardeners and allotment holders. £82. This is from one of my recent visits to a garden nursery. Note that green polytunnel covers do not let enough light permeate through the tunnel. 5” thick PVC pipes each 3. Use row covers or mini-polytunnels inside your greenhouse for an extra layer of protection against the cold. Greenhouse in winter. 83m) Wide. Keep in mind, the longer the polytunnel, the more it will need to be braced for additional support. It’s possible to grow pot outdoors, indoors or in a greenhouse or high tunnel. 4. . Our polytunnel structures are all. Remove and recycle the lids. 24 reviews Cogfs Plant Tunnel Arches, Tunnel Arch for Raised Bed, Greenhouse Tyres, Bows for polytunnels, Tunnel Arches, polytunnel for Raised Bed, polytunnel Raised Bed, Greenhouse TunnelA polytunnel can really help to prolong the growing season as much as possible and can make it easier to grow tomatoes well. 99. View More. Heat retention: Greenhouses often require more heat during the winter months, whereas a polytunnel covered with a Thermal polythene and without the drafts of a greenhouse, can help if you’re considering over-wintering crops. 00. At Feel Good UK we deliver a high-quality range of garden Polytunnels and Polytunnel Accessories, designed to help grow your own crops by protecting your plants from adverse weather. com to get agricultural greenhouses for growing and/or cultivating different plant types. It’s best to go for one that’s at least 6ft (1. 1. 00. €10. Still, most gardeners will start sowing tomato seeds indoors early next year, in order to have the best chance possible of a good harvest before the cold weather arrives once more. Keep the plastic taut when fitting. There was a small green plant stoically growing in each plant pot. Netted windows with PE covers to help you control the temperature inside. 45m. Outsunny Steel Large 14. 4. 32m) Wide From £2,187. Extend Your Growing Season. Ground preparation. Explore our curated selection of top-quality greenhouses today. Leave the doors open so as to prevent the humidity from rising too much, especially if you currently have some growing plants in place. The list of plants to grow in summer in the polytunnel comprises tomatoes, peppers, greens, herbs, beans, squash and zucchinis, eggplants, okras, green onions, and melons. Constructed using powder coated steel. 44m) WidePolytunnel & Canopy Covers. These structures, primarily used for growing plants…Allotment polytunnels will offer protection and peace of mind in the unpredictable UK weather. Galvanizing process is now commonly used for a large array of applications, including greenhouse tubing. 99 (1 new offer) Kingfisher Transparent PE Grow Tunnel. Pop-Up Greenhouse High Strength PE Cover Powder-Coated Steel Construction Portable Greenhouse. Polytunnels on the other hand provide outstanding value for money. Our replacement polytunnel covers are made to withstand the UK's harsh weather conditions. x 8 ft. They allow through the whole spectrum of sunlight, but trap the (infra-red) radiation that is reflected from the earth or plants (plus the warmed air is prevented from mixing. Anti Bird Net - Buy by the Metre From £1. We offer our kit in various lengths ranging from 20 to 100 feet because we know that space and budget are primary concerns no matter the size or volume of your farming operations. 15m) Wide From £3,326. New shopping malls rise above the plastic. Galvanizing gives the elements resistance to corrosion. Constructed from durable polyethylene, this green polytunnel connects with ties for easy assembly and stronger, longer lasting life span. 00. 🥬🥕👌 . $219. 00. 4. I live in Scotland. A polytunnel is a polyethylene tunnel elongated and stretched out in a long caterpillar, semi-circular shape. Frame Only 6m x 3m Poly Tunnel Polytunnel Greenhouse Green House Polly Tunnel. Polytunnel Greenhouse 4x4x2 m, 16 m², Transparent £301. Green polytunnels? 16-10-2006, 12:45 PM. 6FT Large Walk-in Greenhouse Heavy Duty Galvanized Steel Frame 2 Zippered Screen Doors 8 Screen Windows Tunnel Garden. Learn how to easily splice polyethylene plastic sheets to replace or repair cover on high tunnel, polytunnel, hoop house, or greenhouse. But we can build a low cost green house by ourselves. French beans, runner beans, sweetcorn, cabbage and bedding plants for borders all thrive under cover at the beginning of their growth cycle, ensuring your crops get off the a successful start. 00 £ 79 . They continue to become more popular each gardening year. While potentially somewhat more challenging to grow than loose-leaf lettuces, and butterhead, romaine types are still pretty easy to grow in most temperate climate gardens. There’s plenty of scope when it comes to herbs, too—Rosemary, sage, thyme, and oregano work especially well in polytunnels. Crinkill House, Birr, Co Offaly Eircode R42 VX36 Tel: 057 912 0424 Fax: 057 912 0944 Email: [email protected] are more effective in warmer climates, whereas greenhouses are better suited to cooler climates. Iwinna Polytunnel Greenhouse Clear Polythene Repair Tape(200-25) 7. For this purpose you need to choose clear covers like glass, single-wall polycarbonate and acrylic plastic. I'm lucky. The idea is that you are at one end. 5” thick PVC each 14 feet long. Case study → Greengrow Agriculture’s Shade House Counstruction 600 sqft white color 50% shaded net house build on Padukka area for hardening the tissue culture plants. Do not buy a flimsy, itsi wizzy polytunnel. 4 – Blue-Colored. It mostly absorbs the spectrum of red light and it’s UV stable. I start everything in the polyshed, then farm them out either into the greenhouse or the polytunnel. “We use the high tunnels to help schedule cut flower harvesting earlier and later, when prices are best,” says Pete Smit, who co-owns the nursery with his brother Gerard. 8Ft (2. How to Build a Plastic Bottle Greenhouse. View More. Green & White Polythene (200 Micron) Prices listed above are per meter. Join Date: Jul 2006; Posts: 309. 99. The plants weren’t for sale. Giving your patios. I was attracted to the edge of a polytunnel by a splash of bright colour. You might be better off getting a small garden greenhouse, such as a mini greenhouse. Protecting crops from pests and adverse weather, our polytunnels optimise climate conditions for your specific environment and needs. Our customers often ask: “Will I be able to build my own polytunnel?”. 00 to £2,879. Fix it to the base rail or bury in a trench. How to build a polytunnel. High Tunnel Greenhouse Kit makes it easy to create enough space on your home or business property, no matter the scope of your project. Palram - Canopia Harmony Silver Greenhouse - 6 x 4ft. . If you want to grow crops all year round, it’s best to line up the ridge of the structure to run east-west, as this will maximise light during the winter. We offer our kit in various lengths ranging from 20 to 100 feet because we know that space and budget are primary concerns no matter the size or volume of your farming operations. Case study → Greengrow Agriculture’s Shade House Counstruction 600 sqft white color 50% shaded net house build on Padukka area for hardening the tissue culture plants. 4. $40,000 $50,000. RRP: £129. These warmer conditions are particularly essential for growers of exotic plants or those who need to produce food crops on a continuous basis. At only a third of the cost of a greenhouse, polytunnels are great value for money. It can be used for hardening off plants, taking cuttings and shielding plants from the worst of the winter. Polytunnels provide a cost-effective alternative to a greenhouse. While shading can help cool down a polytunnel, you also have to allow enough sunlight inside. 95m)24ft (7. When it gets colder, the condensation in the tunnel freezes and ice crystals develop on the inside of the plastic and in the soil. Birchtree Polytunnel (6 x 3 x 2 m) 2. This allows fruits and vegetables to grow at times usually considered as off season. Manufactured from green, heavy-duty, monofilament netting with. Poly-Tex High Tunnel greenhouses are a quick and inexpensive way to lengthen your growing season, protect your crop from pests and disease, decrease water usage, and increase your crop yield. The outside of the structure will not need such careful treatment. Replacement Poly Tunnel Cover Sizes: Pro+ Range: 3m x 2m, 4m x 2m, 4m x 3m, 6m x 3m & 8m x 3m. “ If you want a hardwearing and durable polytunnel, go for reinforced UV-resistant polyethylene with a thickness of at least 170 microns. . In a garden it may be different. 92. Semi-circular in design, polytunnels come in a variety of shapes and sizes. Perfect for new polytunnel builds or as replacements for an existing polytunnel system, all our covers are made with polythene for its thermal, weather resistant qualities. ie we offer top quality polycarbonate polytunnel and greenhouse sales, delivery , installation and maintenance services as well as best customer service possible whilst delivering excellent guidance. The Importance of Ventilation in a Polytunnel. A solid polytunnel greenhouse may set you back up. Poly Tunnel Replacement Covers We understand the frustration caused by a rip or tear in the polyethylene cover allowing valuable heat to escape the Polytunnel structure. Anything is possible and the extra warmth and protection provided by your. Discover a world of exceptional greenhouses at KSB Greenhouse. . 75" Large Walk-in Double Cover Polytunnel Greenhouse Outdoor w/ Roll-Up Zipper Doors and Windows Grow Plants, Seedlings, Herbs, or Flowers In Any Season-Gardening. I grow plenty of other crops alongside these other groups, but the rotation focuses. Garden Point 2,5M(L) x 2M(W) x 2M(H) Green Polytunnel Greenhouse with Galvanised 19mm Diameter Steel Frame Poly. Heavy Duty Direct From Manufacturer Full Kit (No Doors) $1,942. Fasten the Polytunnel frame to the wooden frame. 4. Whether you're looking for a timber or polycarbonate structure, read on for our tips to find the perfect greenhouse on a budget!Can be retrospectively fitted to an existing polytunnel. To assist with pollination. . Budget pick: Garden Point Green Polytunnel or the VonHaus. 8 ft. Comes with 8x steel peg, 4x PP peg, 1x set frame, 1x. Buy as big and good quality as you can get (typically 12-15 m long) 3. 99. Waterproof and windproof this polytunnel is the perfect solution to protect. polytunnel greenhouse sri lanka 0719775775VonHaus Polytunnel Greenhouse – 3m x 2m Walk in Pollytunnel Tent – Heavy Duty Weatherproof 6m² Poly Tunnel for Garden and Outdoor – Steel Frame and Steel Frame Door – Insect Proof Roll Up Mesh Windows. You can make this school science project and lea. 5" high should suffice. Stone Method - Gather medium to large stones (Free stones can be found on classified websites) and make a pile with the stones throughout the Polytunnel - It is suggested 36kg of stones to generate heat for each square foot. Poly-Tex High Tunnel greenhouses are a quick and inexpensive way to lengthen your growing season, protect your crop from pests and disease, decrease water usage, and increase your crop yield. Check out the range of small polytunnels for sale to find out which is right for you. Yield and Quality. Lovely Greens is now on PATREON: I'm able to reveal my new Polycrub to you! We've been preparing the site and ge. Polytunnels are generally cheaper than greenhouses due to their more lightweight build and cost-effective materials. Polytunnels are usually shaped, as the name implies, like a tunnel. Celeriac (size of croquet balls) Cabbage and cauliflower (never had such clean veg before) Chiogga beetroot. Cost. Winter is long and runs from mid-November to mid-April, and it is cold but not freezing: the average temperature is a few degrees above freezing (0 °C or 32 °F). 45L x 2W x 2H (m); Assembly required NOTE: Not suitable for bad weather conditionsDon't know how many you would need but keep in mind that they kill everything. Greenhouses and polytunnels: make the right choice. An 8x6’ greenhouse for example will look great in a small garden. The smallest greenhouse available is 2m (6 feet 6 inches) long and can be extended up to 20m (65 feet 7 inches) long, in 2m (6 feet 6 inches) increments. Blue-colored greenhouses and blue light result in higher fruit number, weight, and yield. Condensation issues in polytunnels can be resolved by installing Thermal Anti-Fog covers, which effectively reduce moisture levels. Also, the size of this particular small polytunnel is 6 feet long X 7 feet wide X 7 feet tall. Frame Only 6m x 3m Poly Tunnel Polytunnel Greenhouse Green House Polly Tunnel. To directly replace my 2m by 2. 92. 40 sold. Greenhouses come in a range of widths and lengths, in 2ft (60cm) increments. You may need to long-handled brush to reach. 3) The base was then divided into 3 growing areas and walkways left at either side of the central growing area. No, a high tunnel (AKA Polytunnel ) is not the same as a greenhouse. Windbreak/Shade Net - Buy by the Metre From £1. No featured offers available £48. 4m) wide will enable you to put staging (shelves) on both sides. Quictent Upgraded 20x10x6. Quonset, Polytunnel & Hoop House Ideas. With fittings, hinged doors on both ends, anchor plates, and super-therm 800-gauge (200-micron) polythene cover, a commercial Polytunnel will cost you in the region of $3,500. Northern Polytunnel Door blinds are an economical alternative to roller screens. Quite like traditional greenhouses a polytunnel. 4. Replacement Covers. A polytunnel is an elongated semi-circular or square shaped tunnel. Hi Dee, cheaper is not always better, I can only repeat, what I recommend at my polytunnel courses: 1. This polytunnel greenhouse structure allows for excellent ventilation. 8 x 6. 10. Small Poly Tunnel from One Hundred Dollars a Month. . 99 £ 26 . 5cm tubes were too thin for my exposed site. Minimising wastage. . With a high-quality polytunnel, you will be able to grow a huge range of crops including lettuces, microgreens, leafy greens, carrots, herbs and much more. Pierce the tennis balls with a hole on either eased and tie each end of the cord securely through each tennis ball. Our polytunnel greenhouse range. 5 feet for use at the top as shown by E and F in the greenhouse plan below. Our customers often ask: “Will I be able to build my own polytunnel?”. 3,001. Ground preparation. Greenhouse heaters are great at maintaining a comfortably warm temperature inside your polytunnel when the outside temperature sends the mercury plummeting. I live in East Anglia, and have used green polytunnels for 4 years. In my polytunnel, I often follow a crop of early peas and their companion crops with tomatoes, basil and other leafy greens. Polytunnels are so much better value than greenhouses. We use superior materials in our products to achieve this: - Tanelith E treated timbers for outdoor use. You can extend the life of your winter plants, especially herbs and vegetables, by covering them with protection. Well the first thing is not to confuse a little cheap green mesh so called polytunnel with real thing. We built ours over 12 inch raised beds for about $600 including most of the soil. 8metres to 8 metres. Details of Polytunnel Kits Highlights What It Looks Like Read Reviews & Buy Now! Best 6 metre Polytunnel Kit: 6 metres long x 3 metres x 2 metres 6 sectioned frame on the 6-metre long version 2 metres high, 3 metres wide Super strong 25mm galvanized anti-rust 0. However, adding shades to your polytunnel is tricky because plants need sunlight to grow. 0 5. 5. Hoop Houses polytunnel uses a series of hoops to support the plastic covering. She is a practical, hands-on gardener, with a background in philosophy: (an MA in English-Philosophy from St Andrews University). The use of Base Rails is a very popular option for covering a polytunnel. 3 x 90 degree 13mm corner connections. Clear any stones from the ground and unroll the cover, sliding it over the hoops so it sits evenly over the frame. Commercial-sized Polytunnels traditionally start from 16 feet wide, 8 feet high, and 36 feet long. 6ft Large Walk-in Greenhouses Polytunnel Green Houses Outdoor Portable Hot Plant Gardening Upgraded Galvanized Steel with 7 Crossbars, Roll-up Windows & Doors, Green . Condensation issues in polytunnels can be resolved by installing Thermal Anti-Fog covers, which effectively reduce moisture levels. Outsunny 138"x39"x32" Transparent PVC Mini Tunnel Greenhouse Garden Green Grow Shed Portable Plant Flower Warm House Steel Frame Zipped. Garden Point Green Polytunnel Greenhouse (2 x 2 x 2 m) 4. At only a third of the cost of a greenhouse, polytunnels are great value for money. Solar tunnels are usually at least 3 feet (1 m. For more stability, 4 included wind ropes should be tightened and fixed on the ground by 4 ground stakes Large Greenhouse Overall Dimension: 2. 83m) Wide 8ft (2. Would you agree 🤣 . It’s strong and sturdy, with a powder-coated steel frame and a PE cover with double-stitched seams. 90. Greenhouses & Polytunnels for sale in Ireland - Buy Greenhouse Online - Polycarbonate Polyunnels - Vegetable Seeds and Greenhouse Accessories - We are specialists in polycarbonate polytunnels and greenhouses. £999. In this episode Dee shares how she tidies up and plants some strawberry plants in her polytunnel that were gifted from a community garden project in the Autu. Or fastest delivery Wed, 16 Aug. 10. Polytunnel Greenhouse 4x8x2 m, 32 m², Green £525. I planted Tagetes in the polytunnel to attact beneficial insects into it and it worked brilliantly and looked great. If fencing in your garden isn’t an option, using polytunnels to protect your veg is the next best thing. We offer greenhouse film; benders and jigs for high tunnels and low tunnels; and supports, anchors, and. In this video I show you how after some testing iv come up with a method to make to the hoops for a hoop house from pvc pipe without connectors which makes i. in Abbotsford, British Columbia, is one of them. Hot dip galvanized steel foil tunnels are high strength constructions. Galvanizing process is now commonly used for a large array of applications, including greenhouse tubing. When to plant in polytunnel: March to April. Choice of Coverings: There is a huge range of polythene coverings available from most polytunnel sellers. Find out how to build a polytunnel. Free Home Delivery. So if you have hibernating ladybirds or pet spiders and their eggs, they'll be dead and into the bin after a few minutes. 99. Caveat: This answer assumes that the green plastic shown is pigmented green and thus transmits green light into the greenhouse. අනාගත කෘෂිකර්මය modern agriculture technology 4000ft ,100% ක් සාර්ථක මාලුමිරිස් ආරක්ෂිත ගෘහය. 71. Tomato seedlings are going quick and as space presents itself I am planting for seed collection. Adjust this depth based on how large your want your polytunnel to be. Ventilation is essental for 2 reasons: To keep airflow going so that the tunnel doesn't get too damp in winter or too hot in summer. Our range includes 5 UV stabilized covers, both polythene and net so you can choose the best for your planting needs. A mini polytunnel, portable plant protector, or small space polytunnel is ideal if space is limited. Polytunnel Greenhouse 4x8x2 m, 32 m², Transparent £525. Temperatures can occasionally dip below -5 C (23 F. However, polytunnels are more prone. (3) Add to basket. This damage can occur due to heavy adverse weather or just general wear. 64 /box (5) Model# HYWSCWP-868FZB5WDV0. Low tunnels are temporary structures that are approximately 4 feet tall and 3 to 6 feet wide. 2. Pale plant leaves can be caused by overwatering, lack of nutrients, and limited sunlight which all reduce the chlorophyll density. This is from one of my recent visits to a garden nursery. 3m Long x 33mm OD x 1. I'm pretty sure the text on the film that says 'inside' was facing the correct way when I installed it, however, I'm now second guessing myself and wondering if there is an easy way to tell inside from outside by looking at the plastic (at a glance the. lay out broad bean in rows, sowing every 40 or 60 cm, while keeping a space between plants (10 – 15 cm). A green or clear greenhouse will provide the best light. New and used Greenhouses for sale in Nochchiyagama, Sri Lanka on Facebook Marketplace. It’s best to go for one that’s at least 6ft (1. Only use clear plastic if you use greenhouse for germinating seeds and growing starters for transplanting outdoors. Polytunnel Ground Anchor Kit. Inside the hothouse at 27 October 2021. The interior heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building fasterPolytunnels and Polytunnel Accessories. £40. Palram - Canopia Harmony Green Greenhouse - 6 x 6ft. Polytunnels come in a range of sizes and are used to keep plants, vegetables and fruits warm enough to grow in temperate regions. Stuff that did well in mine include the following. 74m wide and in four lengths: 4m, 6m, 8m and 10m. The Polytunnel Handbook. The first thing to do is to hose down the cover, which should loosen up any layer of dust, grime or algae. Description. « Reply #8 on: October 11, 2011, 19:59 ». 5cm tubes were too thin for my exposed site. A polytunnel can open up a world of possibility for your garden. A more in-depth analysis of building a. Polythene Covers, Netting & PVC / Canopy Covers. Polytunnels are fantastic for protecting crops against a range of problems and pests. Walk In Polytunnel Outdoor Garden Greenhouse with Roll Up Door Steel Frame (6x3x2m) 4. £219. Rooter. 71. But we can build a low cost green house by ourselves. 99. This item: Garden Point 2,5M(L) x 2M(W) x 2M(H) Green Polytunnel Greenhouse with Galvanised 19mm Diameter Steel Frame Poly Tunnel £79. The Range. Air. Net Polytunnel Covers. Large Walk In Greenhouse (8 Shelves) - Clear. For example, Delite Garden polytunnel greenhouse frames are made of hot-dip galvanized tubes and hardware. At higher intensities, it promotes flowering in long-day plants and inhibits flowering in short-day plants. In essence, these tunnels. 6Ft (1. Cloches, cold frames and polytunnels are like mini unheated greenhouses that keep out the cold and wind and help retain heat around the plant. The polytunnels you are looking at (with the green cover which includes a roll-up blind door) are only really suitable to be used as temporary covers for short periods of time on sheltered sites – These polytunnels will not stand up to being placed on a permanent site because of the lack of structural stability and the. Elizabeth Waddington is a writer, permaculture designer and green living consultant. We're proud to be one of the very best net polytunnel covers suppliers in the UK and are able to produce one-piece sewn net polytunnel covers, which have an impressive 8-10 year lifespan. The specially developed cover provide optimal growth conditions. In this video we show you how to build a polytunnel from Premier Polytunnels in the UK. Farmers glint with gold jewellery. 5. Poly Tunnel Replacement Covers We understand the frustration caused by a rip or tear in the polyethylene cover allowing valuable heat to escape the Polytunnel structure. A polytunnel (also known as a polyhouse, hoop greenhouse or hoophouse, grow tunnel or high tunnel) is a tunnel typically made from steel and covered in polyethylene, usually semi-circular, square or elongated in shape. Look, I’ll fess up if you will too. 1) Each arch built up with an 'L' shaped piece at the bottom of each leg. Having doors at both ends of a polytunnel is a good idea as this will allow for a through breeze which will aid in natural ventilation. While potentially somewhat more challenging to grow than loose-leaf lettuces,. £865. The polytunnel mainly protects them from the elements. Use small cloches (plastic drinks bottles, old milk containers, etc. That is the large walk in frame tunnels covered in plastic sheeting for growing a wide variety of crops from lettuces to tomatoes and raspberries. £999. Visit the PHI VILLA Store. ආරක්ෂිත ගෘහයේ. A polytunnel (also known as a polyhouse, hoop greenhouse or hoophouse, grow tunnel or high tunnel) is a tunnel typically made from steel and covered in polyethylene, usually semi-circular, square or elongated in shape. Steps for constructing basic polytunnel greenhouse: This should give you a basic enough structure to start working in a greenhouse. Pre-order now to be the first to get a cop. 4. Polytunnels consist of a plastic sheet, which is typically either clear, opaque, or green, stretched over a series of aluminum arches. I recommend two 6' long walls facing two 8' long walls. 2) The back end supports were created from scaffold boards and screwed into place. 99 (1 new offer) Kingfisher Transparent PE Grow Tunnel. It works the same way a normal greenhouse made of glass would, by attracting and trapping the sun. Out of them all the 2 veggies that really surprised me were the carrots and parsnips. The hoop house range, includes outdoor structures that can be up to 20 meters long, by 5 meters wide. 2. Stock photos, 360° images, vectors and videosSome things I tried in the polytunnel were because I had one or two plants left over, after planting the majority outside. £39. අනාගත කෘෂිකර්මය modern agriculture 4000ft ,100% ක්. There are many gardening tricks to guarantee a better yield. Browse this range of polytunnels brought together from leading UK online Garden shops. Read more 48 productsPoly-Tunnel Greenhouse by My Garden Product code: P889364 Features Long & spacious greenhouse Sturdy steel frame Included guy ropes & ground pegs Information This. 95 £79. With a mini polytunnel protecting your crops, you will also find that you add at least 6 to 8 weeks of growing time to your garden. Polytunnel ventilation is vital to a thriving polytunnel garden. What I’d use down the allotment: Garden Point Green Polytunnel or the BIRCHTREE depending on what size I need. Ventilation. . Get your green fingers out, anywhere - whether it's on a balcony or in a designated allotment patch, thanks to this compact greenhouse from Outsunny. Image used with permission by copyright. They might be made from a variety of wastes. It will also allow them to retain the heat inside the greenhouse. The exception here is if you only have a small space. Find out how to build a polytunnel. VEVOR Walk-in Tunnel Greenhouse, 10 x 7 x 7 ft Portable Plant Hot House w/ Zippered Door, 6 Roll-up Windows, Galvanized Steel Hoops, 1 Top Beam, and 2 Diagonal Poles, Green KING BIRD Upgraded 15x6. This item: Garden Point 2,5M(L) x 2M(W) x 2M(H) Green Polytunnel Greenhouse with Galvanised 19mm Diameter Steel Frame Poly Tunnel £79. Green polytunnels offer better light diffusion and insulation, making them ideal for sensitive plants and colder climates. ”. Covered Greenhouse from Swing N Cocoa. . Buy as big and good quality as you can get (typically 12-15 m long) 3. This spacious Poly-Tunnel Greenhouse is a safe and secure place to store and grow your fruit, vegetables and plants. Next clean the sides using a long handled soft brush and hose. .