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Vitavia 8x12 Black Neptune 9900 Greenhouse
SAVE £166
Click to enlarge
- For illustration purposes.
Greenhouse Dimensions
A: Greenhouse width
2570mm (8′ 5″)
B: Greenhouse depth
3830mm (12′ 6″)
C: Ridge height
2300mm (7′ 6″)
D: Eaves height
1350mm (4′ 5″)
E & F: Door Size
610mm (2′) x 1860mm (6′ 1″) (aperture)
Minimum Base Size
2570mm (8′ 5″) x 3830mm (12′ 6″)
Quick Code: P12474
"Grow big, grow strong with the 8x12 Vitavia Neptune 9900 Black Greenhouse - the spacious 8ft wide greenhouse with rust-proof frame, child-safe glazing, and integrated gutters. Perfect for serious growers seeking optimum height and strength. Backed by a 10-year warranty for peace of mind."
Add a Base Plinth (Recommended):
Do I need a Base Plinth?
Add a galvanized steel base plinth for strength and stability. Ideal for placing straight onto slabs or concrete. Includes corner posts for soft ground installations. Your greenhouse MUST sit on a raised plinth. You can build one from bricks, timber or easiest is to buy this base plinth with your new greenhouse.
No Base + £0
Vitavia Black Steel Base + £123
Get it installed by Professionals:
If you select this option you will also need to add the base plinth option.
Get it installed by Professionals?
Please Note: Installation requires an optional base plinth (if available) on a flat, level surface like slabs, concrete, or decking that meets the minimum base size. The package includes the greenhouse, ventilation, and downpipes only; accessories and groundwork are excluded. This may extend the standard delivery time by 2-4 weeks.
Installation is only available in these postcode areas: B, BA, BB, BD, BL, BN, BS, CA, CB, CH, CO, CR, CT, CW, CV, CV, DA, DE, DE, DH, DL, DN, DY, EH, GL, GL, GU, HD, HG, HP, HU, HX, IP, KA, KT, LA, LE, LL, LN, L, LS, M, ME, MK, ML, NE, NG, NN, NR, OX, OL, PE, PR, RG, RH, SE, SG, SK, SM, SN, ST, SW, SY, TF, TN, TS, TW, WA, WF, WN, WR, WS, WS, WV, YO.
No Installation + £0
Installation + £560
Ventilation information
Auto Roof Vent Opener - £38.00
This automatic opener for your roof vents will automatically open your roof vents to ventilate your greenhouse when it becomes too hot.
Curtain Shading - £27.00
Curtain shading will protect your plants from sun scorch and provide shade to moderate temperature. 6ft x 8ft.
Louvre Window Black - £49.00
A louvre window brings fresh cool air into your greenhouse to moderate the temperature inside. An essential add on. Not available for Zeus models
Auto Louvre Opener - £48.00
This automatic opener mechanism will open your louvre window for you when you’re not around. No need to worry about ventilation, this does it automatically for you! (Does not include louvre window).
Staging information
2 Tier Staging Black - £96.00
This 2 Tier Vitavia black greenhouse staging gives you a handy work surface with additional low level storage. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)
1 Tier Staging Black - £74.00
This 1 Tier Vitavia black greenhouse staging gives you a handy work surface and storage area. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)
Folding Staging Green - £69.00
This green staging simply folds out from the frame of your greenhouse when you need it and is supported by 2 folding legs.
Black Aluminium Shelf - £49.00
Black aluminium shelf that fixes to side of greenhouse. 122cm x 15cm
Extras information
Rainwater Downpipe Kit - £16.00
Kit contains 2 x Downpipes to collect the rainwater from the gutters in your greenhouse.
Max/Min Thermometer - £23.00
This thermometer will tell you your maximum daytime temperature as well as record the lowest night time temperature in your greenhouse.
Screwhooks - £7.00
These handy screwhooks screw into the roof bars of your greenhouse for to attach wire or string to for growing vine plants like tomatoes. 10 screwhooks per pack.
Water Butt Connecting Kit - £17.00
Hose and connector fittings to connect your Vitavia Downpipe to your Vitavia Water Butt.
Bar Capping information
Capping replaces the wire clips that hold your glass in the greenhouse frame.
Glazing Bar Capping - £139.00
Adding Bar Capping to your greenhouse makes the glazing fully secure in the frame. This is particularly advantageous with Polycarbonate that can flex in windy conditions.
Black Cresting information
Vitavia Black Roof Cresting - £115.00
Complete the look of your Vitavia greenhouse with ridge crestings
Greenhouse Flooring information
The Fastfit 8x12 Greenhouse Floor Kit is the most cost effective and simple way of providing a level floor for your Greenhouse.
Fastfit 8x12 Greenhouse Floor Kit - £330.00
The 8x12 Greenhouse Floor Kit comes with a simple to construct click together system complete with water permeable membrane to provide essential drainage for your greenhouse whilst keeping the weeds at bay. Quick and easy preparation means no waiting times for concrete to dry.
NOTE: This kit must be placed on a level and compacted surface that will not subside. It is essential that a greenhouse is built onto a hard, level surface to ensure stability and a long working life.
NOTE: Our fitters only install greenhouses onto slabs or concrete and therefore is not compatible with this floor kit.
The 8x12 Vitavia Neptune 9900 Black Greenhouse is a superb 8ft wide large greenhouse at a great price !
The Neptune Greenhouse is a spacious greenhouse for keen growers. An 8ft wide greenhouse gives those with a bit more space the ability to grow large crops in a very comfortable space big enough for all your growing needs.
This Vitavia Neptune 8x12 has 2 opening roof vents for ventilation, a smooth sliding single door, powder coated Black finish and integral gutters.
- 2570mm (8ft 5") Wide Aluminium Greenhouse - Practical width for serious growing.
- 6mm Twin Wall Polycarbonate Glazing - Great Child Safety and Insulation.
- 2 Opening Roof Vents - For good ventilation.
- Black Powder Coated Aluminum Frame - No rust or discoloration!
- Single Sliding Door - Door can be held at any desired position.
- High Eaves (1350mm) - For Optimum Growing Height.
- Integrated Gutters - Collect all that lovely rain water for your plants.
- Extra Bracing and Corner Plates - for strength in roof and corners.
- Optional 60mm Galvanised Steel Base Available Below - For rigidity and strength.
- 10 Year Warranty - on frame and base.
- PLEASE NOTE - Image shows 8x12 with Toughened Glass.
Delivery is currently within 4 weeks to UK Mainland.
Delivery within 8-10 weeks for Green Venus and Apollo 5000 Models.
Your exact delivery day will be confirmed with you at least 3 days before the scheduled day by email.
Optional Installation: If you have chosen optional installation, this may add 2-4 weeks to your delivery time as stated on the website. Our installation service is provided by Greenhouse Installations UK. If you require staging or shelving assembly, you can arrange it directly with the installation team.
Greenhouse Dimensions
A: Greenhouse width
2570mm (8′ 5″)
B: Greenhouse depth
3830mm (12′ 6″)
C: Ridge height
2300mm (7′ 6″)
D: Eaves height
1350mm (4′ 5″)
E & F: Door Size
610mm (2′) x 1860mm (6′ 1″) (aperture)
Minimum Base Size
2570mm (8′ 5″) x 3830mm (12′ 6″)
High-Performance Twin-Wall Polycarbonate
Upgrade your greenhouse with our superior twin-wall polycarbonate panels:
- **Exceptional Insulation**: The twin-wall design provides excellent thermal insulation, helping to maintain stable temperatures inside the greenhouse.
- **Durability**: Made from impact-resistant materials, these panels are built to withstand harsh weather conditions and UV exposure.
- **Light Diffusion**: The structure of the panels diffuses sunlight evenly, promoting healthy plant growth by reducing hotspots.
Twin-wall polycarbonate is an ideal choice for greenhouse glazing, offering a balance of strength, light transmission, and insulation. It's perfect for both amateur gardeners and professional horticulturists.
Black Powder Coated Frame
The Black powder coated frame and optional base look great and protect the aluminium from weathering. Powder coating is a process where powdered paint is applied using an electrostatic charge to transfer the powder to the aluminium.
Vitavia Greenhouses
Vitavia Greenhouses are known for their high-quality construction, featuring corrosion-resistant aluminium frames and a range of glazing options. Designed for both novice and experienced gardeners, they offer durability, style, and excellent growing conditions.
10 Year Warranty
Vitavia greenhouses come with a 10-year warranty on the greenhouse frame. This warranty covers any manufacturing defects in materials or workmanship. However, it does not cover glass or polycarbonate. The warranty is only valid if the greenhouse is assembled according to the provided instructions
Frequently Asked Questions
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Do I need a Vitavia Base Plinth?
Yes, you'll definitely need some kind of base for your greenhouse. Here's why:
- The front door end of the frame sits a bit lower than the rest of the greenhouse.
- This means it needs to hang over something sturdy, like timber battens or a Vitavia Steel Perimeter base.
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Why choose a Vitavia Steel Perimeter base?
It's a great option because it:
- Helps make sure your greenhouse is nice and square
- Keeps everything level before you start adding the glass
Think of it as giving your greenhouse a solid foundation to stand on. It's like making sure your house has good footings – it just makes everything more stable and secure. Remember, a well-set base means a happier, longer-lasting greenhouse!
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How do I prepare the base for my greenhouse?
For best results, build your greenhouse on a perfectly square and level slab or concrete base, or use anchor spikes if you have a Vitavia Base. You'll find the exact measurements and instructions for using the spikes in Section '0' of your assembly guide.
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How is the Greenhouse Packaged?
Your greenhouse frame and base will arrive in long, thin boxes made of sturdy cardboard. The glass packaging depends on what you've ordered: boxed for horticultural glass, or as individual sheets for full pane toughened glass.
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Where do I find the assembly instructions?
The assembly instructions will be in the main greenhouse box, and it will clearly state “assembly instructions in this box”. You can email us at [email protected] and we can email them to you also.
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How long does it take to build?
Building your greenhouse is typically a weekend project: set aside Saturday for the framework and Sunday for glazing. Remember, it's crucial not to leave the greenhouse partially glazed, and the time may vary depending on the size of your greenhouse.
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Where should I start with my greenhouse assembly?
Begin by thoroughly reading the assembly instructions, then prepare the ground, assemble the base frame, build the greenhouse frame, and finish with glazing - in that order. Follow the instructions step-by-step, including the summary at the front of the manual, to ensure a smooth assembly process.
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What if I'm missing parts or something is damaged?
If you discover any missing or damaged parts, don't worry - we're here to help! Simply email us at [email protected] with your order number, and we'll get in touch with you as soon as possible to resolve the issue.
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Do you provide installation services?
If you're interested in this service, just add the Installation option above. One of our Professional Greenhouse Installers will install your new greenhouse for you. All we need is a properly prepared flat slab or concrete base to fit your greenhouse onto.
