FAQ Greenhouses


A greenhouse is every gardening enthusiast's secret weapon. With the right greenhouse, you can enjoy fresh tomatoes in spring, herbs in autumn and flowers in full bloom – all year round. But how do you choose the right greenhouse? And how do you maintain it optimally? Below, we have compiled all the frequently asked questions and useful tips to help you choose the perfect greenhouse. 👉 Ready to get started? Take a look at our wide range of conservatories and growing accessories and give your garden a growth boost!

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🌞 What are the advantages of a greenhouse?

A greenhouse offers numerous advantages: 
  • Longer growing season – Protects against cold, wind and rain. 
  • Faster growth – The temperature rises more quickly, which is ideal for seedlings. 
  • Fewer pests – Your plants are protected from snails, birds and insects. 
  • More sustainable gardening – Less waste of water and nutrients.

🧱 Which material should I choose: glass or polycarbonate?

Both materials have their advantages: 
  • Glass: allows plenty of light through, looks stylish and is durable. Ideal for permanent installations. 
  • Polycarbonate: lighter, shatterproof and better insulated. Perfect for changing weather conditions and easy to install.

🌿 Which plants can I grow in a greenhouse?

Almost anything! Popular choices include:
  • Vegetables: tomatoes, peppers, cucumbers, lettuce, aubergines
  • Herbs: basil, mint, coriander, parsley
  • Flowers: petunias, geraniums, orchids

❄️ Can I also use a greenhouse in winter?

Certainly! In winter, you can: 
  • protect frost-sensitive plants,
  • grow lamb's lettuce or field lettuce
  • and start sowing seeds as soon as the days get longer again.
Please ensure that your conservatory is well insulated and, if necessary, equipped with a heating element.

💧 How do I maintain my greenhouse?

A well-maintained greenhouse will last for years. A few tips:
  • Clean glass or panels at least twice a year. 
  • Regularly check the seals and frame. 
  • Ventilate regularly to prevent mould growth. 
  • Use rainwater as a sustainable source of irrigation.

🔧 How do I choose the right size?

That depends on your garden and your growing plans: 
  • For beginners: mini or wall greenhouse of 2–4 m². 
  • For advanced growers: freestanding greenhouse of 6 m² or more. Also consider access space, working height and possible expansion options.

🔥 Which accessories are useful in a greenhouse? 

With the right accessories, you can get even more out of your greenhouse: 

  • Automatic window openers – ensure optimal ventilation. 
  • Thermometers and hygrometers – monitor temperature and humidity. 
  • Growing tables, racks and plant trays – for order and efficiency. 
  • Shade cloth – prevents overheating in summer.

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ACD Alu clamp (toe pinch) for atlas wire - 20 pieces
€15.50
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ACD Door hardware bag (4 wheels + bolts + aluminum plate (door stopper))
€40.00
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ACD rubber strip on roll 26.5 m
€129.00
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ACD crank for spindle skylight
€79.00
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ACD spindle for skylight
€59.00
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ACD L-clamps silver - set of 10 pcs.
€12.45
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BioGreen electric heater against frost - protect your plants in the greenhouse!
€69.95
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ACD set of 2 shelves black RAL9005: 86 x 15 cm
€115.00
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ACD aluminum plant supports (RAL9005) - Set of 2 supports for the greenhouse
€32.99

How do I prepare the ground? 

For a greenhouse that is placed directly on the ground, it is important that the intended ground is free of obstacles. The ground should be as level as possible and the soil should be well compacted


How will my greenhouse be delivered? 

A greenhouse is always delivered by a large lorry. Depending on the exact greenhouse you have ordered, the packages will be placed on one or more pallets and delivered to your home by lorry. It is not possible to collect your conservatory yourself.

Please note: the transporters will place the entire package on the pavement, not in your garden. 

Is your home difficult to access with a large lorry, or is it located on a street where lorries are not allowed to drive? Be sure to mention this when placing your order.

In the case of a pallet delivery, the recipient will be contacted in advance. This is because a pallet is not a standard parcel that can be left in your letterbox. You will be contacted by the carrier to arrange a delivery time. A pallet may not be left at a residence without permission. That is why an appointment is always requested for the correct delivery time.

Why does a greenhouse have a longer delivery time?

Most parcels at Hermie Online are shipped on the day of the order or the day after. This is not the case for greenhouses. This is because we do not keep greenhouses in stock ourselves. When you order a greenhouse, it is delivered directly from the supplier. Furthermore, greenhouses are not available in ready-made packages from suppliers. Precisely because some personalisation is possible, production of your greenhouse only starts after it has been ordered. The delivery time for a coloured greenhouse is always slightly longer than for an aluminium greenhouse because the profiles of a coloured greenhouse still need to be coated before the package is ready for delivery.

What if my greenhouse is damaged upon delivery or parts are missing?

Our suppliers do their utmost to package everything as well as possible. Unfortunately, damage during transport can never be completely ruled out. 

✅Check the delivery immediately upon receipt for damage and missing parts. 

🚫Do not refuse delivery, even if there is damage. 

📸Take photos of the damage and report it immediately to Hermie customer service. 

You are always entitled to a complete and undamaged product. If damage occurs, we always take it seriously and do everything we can to resolve it as quickly as possible.

What about the installation of my greenhouse? 

Greenhouses are generally supplied as self-assembly kits. Fortunately, assembling a greenhouse is easy to do yourself. We estimate about two days' work for two people. Choose a dry, windless day. 

Not keen on assembling your brand-new greenhouse yourself? Vitavia does not provide an assembly service, so you will have to find your own solution, for example by hiring an independent contractor or gardener. An ACD greenhouse can be assembled for you, provided that the delivery address is in Belgium. The cost of assembly varies depending on the type of greenhouse

1. Choose the location

  • Choose a place with plenty of sun: the more hours of sunshine per day, the more types of crops you can grow in your greenhouse. 
  • Find a wind-free location: If your greenhouse is exposed to the wind, this increases the risk of glass breakage. 
  • Place your greenhouse with the door opening facing south: This allows your plants to benefit optimally from the sun without burning at the hottest time of the day. 

2. Gather your tools 

With a few minor exceptions, you don't need to drill any holes for a greenhouse. All the tools you need to assemble a greenhouse can be found in a standard toolbox

  • spirit level 
  • electric drill and screwdrivers 
  • wrenches 
  • ladder 
  • Stanley knife 
  • rubber hammer

3. Follow the instructions carefully 

This is the most obvious step, but we want to mention it anyway. A greenhouse is not a side table. It is a large structure and the assembly sequence described in the manual must be followed for flawless assembly. If a particular profile does not fit or you get stuck, go back a few steps in the manual. Chances are you have made a small mistake.

Does my greenhouse need to be completely level? 

Yes, although some margin is possible. Your greenhouse must be completely level and square in width. In length, your greenhouse may slope by a maximum of 1 cm per running metre. If your greenhouse measures 5 metres on the long side, the rear façade may be a maximum of 5 cm lower than the front façade. This allows rainwater to drain away easily.


What about the warranty on my greenhouse?

The warranty period varies from brand to brand. 

Please note: the warranty covers the construction, profiles and weathering of polycarbonate sheets. Glass breakage is never covered by the warranty (except upon delivery, of course). 

There is also no warranty for damage caused by: 

  • exceptional natural phenomena 
  • an unsuitable location 
  • modifications made by the consumer 
  • insufficient anchoring 
  • incorrect use of cleaning products 
  • incorrect installation

Do I need a permit to install a greenhouse? 

In most cases, no, as long as the greenhouse does not exceed a certain size and is not permanently inhabited. However, the rules vary from municipality to municipality. Always check with your local authority to see if an environmental permit is required


Can I also use my greenhouse as a winter shelter? 

Yes! It is perfect for frost-sensitive plants such as citrus trees, olive plants or fuchsias. Just make sure you provide: 

  • Sufficient light 
  • Minimal temperature drop 
  • Insulation or light heating