Description

What materials are used to build this cold frame?

This Shire Holkham 4x3ft Cold Frame is constructed from high-grade, sustainable timber and 12mm tongue-and-groove cladding to withstand daily weather exposure. The lower boarding forms a sturdy wall structure, while the upper hinged lid is fitted with 3mm toughened glass to ensure maximum sunlight exposure and create greenhouse-like warmth. The structure features a pressure-treated timber frame, offering a built-in defense against ground moisture, insect attack, and rot.

How does the ventilation system work?

The cold frame utilizes a hinged top lid with prop supports, allowing you to manually adjust airflow and regulate internal temperatures. Propping the lid open on warmer afternoons prevents heat buildup and protects delicate seedlings from scorching, while closing it tightly retains warmth overnight to shield young plants from sudden frosts.

Is the cold frame easy to access?

The large top-opening glass lid provides a wide overhead access point, making it effortless to arrange plant trays, water seedlings, or harvest crops. Fitted with clear 3mm toughened glass, the lid ensures complete visibility into your growing space while offering a robust lid structure built for daily use.

Features:

• Guarantee - 10-year anti-rot guarantee

• Walls - 12mm tongue-and-groove joinery panels

• Lid/Roof - Hinged frame with 3mm toughened glass panes

• Frame - Sturdy 34mm x 34mm timber framing

• Treatment - Pressure-treated 

• Access - Top-opening hinged lid

• Footprint - Compact 4ft x 3ft design

Make the Most of Your Cold Frame

To maximize your growing season, position the 4x3ft cold frame in a south-facing spot on your patio, garden bed, or allotment to capture full sunlight. Its compact footprint makes it the perfect solution for smaller outdoor spaces. Use the warm, sheltered microclimate to nurture young plants, cultivate fresh herbs and vegetables, or safely harden off tender seedlings before planting them out in the main garden.

About Your Order:

The Shire cold frame is a British-made garden building made from sustainably sourced timber. You will get a low-carbon footprint wooden greenhouse made from ethically sourced materials. The practical design makes it straightforward to assemble. It comes with a 10-year anti-rot guarantee and a 12-month manufacturer's warranty. 

Superior fixings,and optional assembly from the manufacturer is available. The timber boards attach to a solid internal framing to make hard-wearing and sturdy panels. The Greenhouse is flat-packed for easy handling and assembly.

Please note: Images may depict furnishings and accessories; optional potting shelf, these are for illustration purposes only and are not included with your order. 

Cold Frame Aftercare

The greenhouse has timbers that have been pressure treated to protect them against rot. You must apply a preservative and waterproofing topcoat immediately after installation. Using the treatment after installation, followed by consistent annual treatment of the garden summerhouse, will maintain the high-quality finish and is a requirement of the 10-year anti-rot guarantee. A 1-year manufacturer's warranty is included as standard.

To treat the greenhouse, elbec recommends Protek wood treatment. Browse our Protek Royal Exterior Wood Finish Paint range to find the best paint colour to add your personalised finish.  In the options section, we’ve also included popular colours and a Wood Preserver+ for use underneath your colour choice.

About Shire:

Shire is one of the UK's leading manufacturers of garden buildings. Shire proudly manufactures the most extensive UK timber garden building range. Their range includes Garden Sheds, Log Cabins, Eco Homes, Home Offices, Sheds, Workshops, Summerhouses, Playhouses, Arbours, Storage units, and Pet houses.

Their UK production facilities cover 23 acres, including stock holding facilities and an advanced high-speed timber planing mill. There is also a modern, well-equipped joinery production facility and semi-automated production lines. All Shire garden buildings are manufactured in the UK using the finest spruce timber, imported directly, and manufactured using the most up-to-date machines to ensure the best quality and best value-for-money garden sheds in the UK.

Frequently Asked Questions (FAQs)

What base does the Holkham Cold Frame need? The cold frame should be placed on a firm, flat, and level surface—such as paving slabs, gravel, or a level garden border—to ensure frame stability and proper lid operation.

What can I grow in a 4x3ft Cold Frame? It is ideal for hardening off spring seedlings, growing early crops of salad leaves, spinach, and radishes, protecting delicate potted herbs, or overwintering fragile perennials.

Does this cold frame require an automatic vent? No, cold frames are designed for manual ventilation. The hinged lid can easily be propped open at various heights to manage internal temperature and airflow as needed.

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Delivery

ALL DELIVERIES ARE DELIVERED TO KERBSIDE AND ARE FLAT PACKED READY FOR ASSEMBLY

FREE delivery is offered to the majority of mainland UK postcodes but some areas may incur a surcharge and some postcode areas are not covered at all. Please check your postcode in the ‘Delivery cost checker’ above to confirm availability and any possible surcharges.

Delivery Lead-times:

The product page above displays the estimated delivery lead time, which is specified in working days (Monday - Friday) and excludes Bank Holidays. Although the manufacturer provides these estimated lead times in good faith, they are not guaranteed due to fluctuations in demand. However, the lead times are representative of delivery at the time of estimation. It's worth noting that delivery may take a little longer in some remote areas.

Installation option of cold frame:

If you are choosing the installation option after placing your order you’ll be contacted within 5 working days by Shire the manufacturer either by a text message or automated telephone message (the latter if a mobile number is not supplied). This message will supply you with the name of the website to go on to where you will be required to accept the terms and conditions for assembly. Any delay in accepting these terms and conditions may affect your timescale. Once you have accepted these terms and conditions you will be contacted during the timescale with a date for the delivery/assembly of your order. The installation option will extend your lead time by up to 15-25 working days. This may take longer during seasonal periods. Please be aware that the installation team will require full access to your garden, 18" clearance all around the building and a firm and level base. Shire's installation team will not bring a building through your home as they are not covered by insurance to enter a customer’s home.

Painting Option:

The delivery leadtime for our painting service the product page above displays the estimated delivery lead time, which is specified in working days (Monday - Friday) and excludes Bank Holidays.

Booking Date:

This product will be delivered to you by Knowles Carrier, acting on behalf of Shire, the manufacturer. Shire's dedicated delivery team will reach out to you directly to provide information about your delivery date.

Upon Delivery
Knowles, a courier representing the manufacturer Shire, is responsible for delivering the item. The delivery is typically carried out using an 18-ton vehicle within the timeframe of 8am to 8pm. Please note that the delivery drivers are insured to deliver only to the kerb side or driveway, and will not take any risks that may result in property damage while delivering the product. Additionally, we regret to inform you that delivery personnel will not be able to enter your property. Finally, the driver will hand-ball the item off during delivery.

It is not advisable to engage a third party for product installation before its delivery and verification of all parts. Please note that we cannot be held responsible for any costs incurred by a third party.

Specification

Quickview

he 4 x 3 Shire Holkham Pressure Treated Wooden Cold Frame is the perfect solution for starting out on your vegetable-growing journey. It’s a top compact choice for smaller gardens, patios, or allotments. The key features include:

• Practical design with a space-saving footprint

• Hinged glass lid fitted with clear 3mm toughened glass

• Manual prop-open lid for effortless ventilation control

• Top-opening overhead access for easy plant care

• Pressure-treated timber for long-lasting rot resistance

• 10-year anti-rot guarantee