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3
votes
1answer
25 views

Greenhouse colors

I am in Kuwait where it gets very hot in summer (up to 50C). I plan to build my greenhouse using polyCarbonite. Can I use another color than clear to avoid the heat inside the greenhouse?
4
votes
1answer
117 views

Should perennials purchased at a greenhouse nursery be acclimatized before planting outside?

Most local nurseries in my area keep perennial plants outside during the summer months. There is one nursery which grows and keeps everything inside a greenhouse all the time. In zone 4 or 5, does ...
5
votes
2answers
38 views

How to get crisp lettuce in a green house

I am raising lettuce in my green house. It works, the lettuce is tasty, however it is not nearly as crisp as the lettuce I grow outside the greenhouse (same variety). What can I do to make my green ...
6
votes
2answers
151 views

If I harvest bell pepper, will it grow back? (I control the temperature in my small greenhouse)

If I harvest bell pepper, will it grow back? (I control the temperature 25 C* in my small greenhouse) If yes, I pick bell pepper fruit only or it needs pruning also after harvesting? how to do it ...
3
votes
1answer
22 views

How to prepare plants to move to greenhouse from indoors?

I've been growing some starts in this little hot-house thing I made after seeing something similar at a local gardening store. It seems to work great - with a heating pad under one of the flats it's ...
5
votes
1answer
27 views

Effect of white/black polythene floor in polytunnel

The oldish, commercial, heated hothouses I have have a floor with a layer of polythene which is black on one side and white on the other - with the white side facing up. What are the pros and cons ...
7
votes
3answers
51 views

How to safely keep plants in greenhouse at low temperatures

I'm a 2nd year gardener and am just now building a small 6x9' greenhouse onto the side of a shed. I've got some indoor starts that are beginning to take up a lot of space (my okra is ~9" tall!), and ...
4
votes
3answers
83 views

Growing temperate and some tropical plants in an indoor 'winter garden' in Ireland

I am in the lucky position of building my own house in Southern Ireland and have have a 'winter garden' room which will have three tall walls of glazing with one side facing south. The roof is very ...
5
votes
0answers
51 views

What is a 4 season greenhouse wall/ceiling made of? [closed]

What material would I want to use to build the walls, and ceiling of for a 4 season greenhouse around the 45N,93W (4a)?
9
votes
0answers
81 views

What is this thin-stemmed plant with narrow leaves in an aquaponics bed in my greenhouse?

This plant grew from seed to about 2' high within 3 months. I'm sure it's not done growing. I have no clue what it could be, since I'm in the bad habit of sticking anything that looks like a seed ...
0
votes
2answers
42 views

What are the most important environmental conditions that affect vegetable production? [closed]

What do you feel are the most important environmental conditions that affect vegetable production in a greenhouse?
6
votes
2answers
42 views

Reputable source of learning greenhouse practices, specifically for microgreens?

I am allowed to use my school's greenhouse and have some space allotted to me. I want to start growing microgreens, but most of the videos and sources I read are always trying to "sell" me something. ...
2
votes
1answer
37 views

Does anyone have some references on using metal halide lamps in a greenhouse?

I am looking for some references to use metal halide lamp in a greenhouse. What specifications should I look for in a lamp?
1
vote
0answers
31 views

Spearmint Yield [closed]

would any of you know approximately how much spearmint I could get per plant? I am looking to buy a four tier greenhouse and fill it up completely with spearmint so I am not exactly sure how much the ...
3
votes
1answer
104 views

Greenhouse in a tropical climate

This may be an odd question. I live in Singapore and I recently bought a small greenhouse because it was cheap and it looked nice. It's about 20x40x50cm. I'm originally from a cool temperate climate ...
5
votes
2answers
344 views

Can I use the output from a house boiler to heat a greenhouse?

I live in relatively cold, rainy Manchester in the north of England and have been experimenting with growing chillies and tomatoes. I've found that they are fine indoors, but die quite quickly ...
3
votes
2answers
127 views

How to protect plants from freezing

Waking at 1 am, I get my shoes on to run out to my greenhouse. I've had a heck of a time getting my garden in this year. I've lost quite a few plants to 'pop' freezes and I'm probably getting ...
3
votes
1answer
79 views

Why are there plants specifically designed for greenhouses?

I have read that tomatoes for greenhouse culture need to be varieties designed to be grown in greenhouse environments. What are the varieties, and where can I get them...just by mail? And what other ...
3
votes
1answer
857 views

Is it OK that the polyethylene sheeting for our greenhouse is opaque, not clear?

We purchased 4mil polyethylene that was supposed to be 'clear' but it is opaque white. We can not see through it at all. Is this normal? Will this work for one year?
7
votes
5answers
5k views

What color should a greenhouse be?

I'm shopping for a greenhouse to protect my tropical fruit trees from winter frosts. While browsing, I noticed that greenhouses are predominantly green or clear. What are the advantages of each color? ...
3
votes
1answer
189 views

How much UV light should I block when shading my greenhouse?

I have a home greenhouse attached to our home. I was thinking about removing the existing shade cloth and replacing it with sunblock film on the upper glass panels. I grow a variety of foliage plants ...
2
votes
2answers
212 views

Improving heat retention and light availability of coldframes

I am currently planning on building some grow-houses/cold frames. Actually mostly raised beds 18" (45cm) high, with the ability to fit panels over it in winter turning them into cold frames. The rear ...
4
votes
2answers
1k views

What thickness of twinwall polycarbonate should I use for my greenhouse?

I bought a cheap grow house with 4 shelves for growing herbs but the wind has knocked it about and it is starting to lean to one side a bit more than it should. I plan to build a wooden frame, to ...
1
vote
1answer
85 views

What can be planted at this time of year in a greenhouse (in the UK)?

Normally we plant tomatoes and cucumber in our greenhouse during the summer here in the UK. We didn't do so this year, but I was wondering what could be planted in a greenhouse, if there is anything, ...
3
votes
1answer
295 views

Protecting winter potatoes from frost with a growhouse

In the first week of August (2013) I started my first attempt at growing potatoes, in grow bags. Actually got the miracle-gro root vegetable bags from garden centre and seed potatoes, so the mix ...
8
votes
2answers
393 views

Is drainage important in Greenhouse beds?

I just finished building my first greenhouse! I built in beds on the shelves along the wall that can have up to 10 inches of soil. (I'm planning on putting 8 inches in.) I lined the bottom of the beds ...
6
votes
3answers
7k views

Glass vs plastic greenhouse covering: pros and cons

When building or buying a greenhouse, it seems to me that the material to use is one of the first concerns. The two options I'm trying to compare right now are glass and plastic films. The ...
4
votes
1answer
139 views

How well would mediterranean plants/trees grow in a greenhouse in northern Europe?

This is the situation: I live quite far up north (Trondheim, Norway), and wish to achieve greater diversity in yield from the garden. Although the climate is not as tough as the position would suggest ...
5
votes
1answer
812 views

What chemicals react with greenhouse plastic and cause it to turn white?

I have a small PVC hoop house that I built last winter and plan on using again this winter. I found out first hand, then read about it later on, that the plastic used for greenhouses will react with ...
2
votes
1answer
214 views

Growing Lilies In Greenhouse References

I'm looking for any kind of references (book , video , PDF , ...) for growing lilies in greenhouse. I heard Lilies are like a child and they need standard growing plan such as irrigation plan , ....
7
votes
1answer
119 views

Is it important to keep greenhouse glass thoroughly clean?

My greenhouse is near some fruit trees and every spring when I come to start off the growing season I find a certain amount of grime has settled across the glass over the preceding year. Most years I ...
7
votes
1answer
227 views

Would an old refrigerated food display case make a good greenhouse?

I came into the possession of one of these: I want to know if it would make a decent greenhouse and, if so, how I could retrofit it to grow some kind of small plants or seedlings. I think the ...
12
votes
3answers
3k views

How to automatically vent a cold frame during the Winter?

I am working on building a cold frame and have purchased a Univent automatic opener to vent the cold frame by lifting the lid/light. However the Univent opener is not supposed to subjected to ...
8
votes
4answers
2k views

Building a DIY greenhouse - where to start?

I'd like to build an inexpensive, removable greenhouse over the back deck. The deck is approximately 20' x 8'. I'd like to build it for easy disassembly and storage in the summer. I've never seen ...
18
votes
4answers
9k views

How large a cultivation area to feed one person?

Consider a project like the Earthship. Supposing one would like to grow food (organic polyculture) indoors in such a habitat (i.e. in a green house). How many m² would be required to feed one person ...
14
votes
3answers
3k views

What is the point of a greenhouse?

How does putting my plants in a greenhouse help them grow? Is it purely to shield them from cold weather, or are there other benefits?