How do indoor greenhouses work
Olivia Owen
Published Mar 13, 2026
An indoor greenhouse is a sustainable and inexpensive way of growing plants at your home all year round. Whether you want to make the growing season last longer, keep fresh herbs close to your chopping board, or have beautiful flowers ready at all times, having your greenhouse indoor makes it all easier.
What is the point of an indoor greenhouse?
An indoor greenhouse is a sustainable and inexpensive way of growing plants at your home all year round. Whether you want to make the growing season last longer, keep fresh herbs close to your chopping board, or have beautiful flowers ready at all times, having your greenhouse indoor makes it all easier.
Do greenhouses work inside?
Indoor greenhouses offer an excellent opportunity to do some gardening within the walls of your home. They can easily capture indoor light and help plants grow faster in a controlled environment full of humidity and warmth. … Because of such features, you can grow plants throughout the year.
What is needed for an indoor greenhouse?
The minimum requirements for setting up an indoor greenhouse include: material to build frame (wood, metal, PVC pipe), material for covering (plastic, glass), potting mix, pots/trays, and seeds. Some optional supplies to include are: grow lights, a thermometer, a heater, fan, hygrometer, etc.Does an indoor greenhouse need direct sunlight?
Generally, a greenhouse should get full sun, at least 6 hours per day, especially during the winter. Site your greenhouse to avoid shadows from buildings & trees, since many plants do best in full sun. However, in especially sunny climates, high altitude areas, or for shade-loving plants, partial shade can be better.
Can you turn a room into a greenhouse?
You can easily turn a spare room into an indoor greenhouse. Not only does this provide you with a space to start seedlings for hanging planter or balcony use, it gives you room to grow summer produce and herbs, which will ensure that you’ll have fresh fruits and veggies year-round.
How do mini greenhouses work?
Mini greenhouses can be tall or short, but generally take up less than about 10 square feet (3 m.) of ground or floor space. Many gardeners use them in place of cold frames to start seedlings earlier than normal for their area, or indoors to propagate plants that need high humidity.
Where do you hang a mini greenhouse?
East or West. Traditionally the favoured aspect for a mini greenhouse as it provides sun for some of the day, without being too hot. Allows the widest variety of greenhouse crops to be grown.How do you install the inside of a small greenhouse?
- Zoning. Keep vegetables to one side and flowers to the other. …
- Shelving. Clever shelving makes good use of the space in any greenhouse. …
- Potting bench. …
- Rubbish. …
- Staging. …
- Hooks and hanging. …
- Plastic storage tubs. …
- Hand tools.
Plastic greenhouses generally help heat-loving plants to grow. This is because they retain warmth from being exposed to sunlight for long periods of the day. However, their effectiveness is not limited to full sun annuals or easy growing vegetables.
Article first time published onWhy do plants grow better in a greenhouse?
Warmth and humidity promote plant growth. Plants need moisture, warmth and light to grow. A greenhouse stabilises the growing environment by buffering the ambient temperature and protecting the plants from extreme cold.
How do greenhouses work in winter?
Using an Unheated Greenhouse in Winter During the day, a typical greenhouse will trap heat from the sun, which allows the plants inside to stay warm at night. … The much-needed sunlight will still come through, but the extra layer of protection will keep your plants safe at night.
Where is the best place to put a greenhouse?
Generally, the best spot for a greenhouse is on the south or southeast side of the house in a sunny area that gets the most sun from fall through winter (November to February in most places). If this option doesn’t exist, the next best location for the greenhouse is the east side.
Do plants grow faster in greenhouse?
Plants do grow faster and better in the greenhouse because in a greenhouse eco-system the temperature is more controlled, the carbon dioxide content is higher as compared to the outdoor which is very important for plant growth.
What veggies grow best in a greenhouse?
The best vegetables to grow in a greenhouse are ones you’ll eat or sell, & that thrive indoors: tomatoes, peppers, strawberries, lettuce & other greens, beans & peas, & cucumbers. Take advantage of cold-tolerant plants like greens during winter, and heat-tolerant plants like peppers during summer.
Should I leave my greenhouse door open at night?
Open all doors and vents on sunny days. These can be left open at night if the temperature remains high. It is sometimes necessary to temporarily remove panes from glasshouses to assist ventilation in heat waves. Fit automatic vent openers to ensure roof vents open even when you are not around.
Do cheap plastic greenhouses work?
Glass is the best glazing material, but it is also the most expensive. Plastic sheeting works well and is inexpensive (see How to build a cheap and easy greenhouse), but will deteriorate quickly. Polycarbonate is less expensive than glass, is lightweight, and retains heat better than both glass or plastic.
Do green plastic greenhouses work?
In studies, it has been found that using green plastic to cover a greenhouse results in plants which are slightly (but very slightly) shorter than plants grown in a greenhouse with a clear plastic covering.
Can plants survive in a basement?
Houseplants can help improve air quality in well-lit basements. … The plants chosen for a basement must tolerate low-light conditions and have the ability to grow under artificial lights. Heated basements are best for houseplants, though some plants will grow in cooler conditions.
Can I turn my basement into a greenhouse?
A basement greenhouse is a great way to get cheap, fresh vegetables throughout the winter. But setting one up takes careful planning and hard work. … In a basement greenhouse, you can grow fresh vegetables like these through the winter in a relatively small amount of space.
How do I set up an indoor grow?
- Find a suitable setup space (spare room, garage, etc)
- Make your space light-tight.
- Choose how to configure your space (e.g. tent, entire room or cupboard within a room)
- Get good light coverage in your setup.
- Set up suitable air exchange.
Is a cold frame the same as a greenhouse?
The biggest difference between a cold frame and a greenhouse is that a cold frame typically doesn’t use a heat source and might only stand a few feet tall; whereas a greenhouse is a tall structure that has heating and ventilation systems for a year-round controllable climate.
Does a mini greenhouse need ventilation?
Yes, greenhouses need ventilation. Ventilation is actually one of the most important parts of a greenhouse. Here are the main things a ventilation system does to keep plants healthy. Now that you know greenhouse ventilation is important for healthy plant growth.
Is a small greenhouse worth it?
Is a Greenhouse Worth It? If you’re even asking yourself the question then, yes, a greenhouse is worth it. A greenhouse provides you with an environment where you can grow plants and vegetables year round. Despite some investment of money, the fruits of your labor make it worth it.
Can a greenhouse get too hot for plants?
So, what temperature is too hot for a greenhouse? Anything above 90 degrees Fahrenheit is absolutely too hot for a greenhouse. Even the toughest vegetables, like tomatoes, won’t do well above 90 degrees Fahrenheit. The ideal temperature for most plants to flourish is somewhere between 80 and 85 degrees Fahrenheit.
How do I organize the inside of my greenhouse?
- Divide your greenhouse into zones. …
- Design your interior around your potting bench. …
- Use shelving that will increase growing space. …
- Utilize space underneath benches. …
- Under-bench storage is also an option. …
- Maximize the upper areas of your greenhouse. …
- Create a labeling system for your plants.
How do I get the most out of my greenhouse space?
- Don’t try to cram too much in. …
- Give adequate space for roots. …
- Keep on top of watering. …
- Ventilate your greenhouse. …
- Damp down in the mornings. …
- Plant marigolds in amongst your veg. …
- Hang sticky yellow fly traps.
What's the best base for a greenhouse?
Concrete Pad By far the most practical and durable foundation for any greenhouse is a solid concrete base. A good option for large greenhouses and can be set above ground level quite easily.
Is a 6x4 greenhouse big enough?
Nicely proportioned, the 6×4 greenhouse has plenty of head space inside and because it’s 6 foot wide it has the benefit of a full sized door entrance too. Go for wood or aluminium, glass or polycarbonate, according to your needs and budget.
Do greenhouses protect from frost?
The protection it provides will not only help you to keep tender plants frost-free – it will also let you grow hardy crops, such as salads and herbs, all winter. An unheated greenhouse can keep overnight temperatures as much as 5°C warmer than outside, which will keep plants frost-free in all but the worst of winters.
What can I grow in an unheated greenhouse over winter?
- Potatoes. The perfect winter ingredient, you can grow potatoes in either grow sacks or a large bucket/flower pot. …
- Winter lettuce. …
- Pak choi. …
- Spinach and kale. …
- Cabbage and broccoli. …
- Brussel sprouts.