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Questions tagged [greenhouse]

Glass building to shelter and heat plants

0
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2answers
33 views

Floor for greenhouse

I read that having an open (directly to earth) floor may cause problems in a greenhouse. So I was thinking of using a foil/barrier plastic to keep the humidity out. On top of that I was thinking of ...
4
votes
1answer
40 views

Is 90% - 95% humidity too much for mint / basil / tomatoes?

I just got a new Socker greenhouse from Ikea and have been trying to grow herbs inside of it. I noticed my mint and basil started to grow brown spots and a chopstick I inserted into the soil has this ...
3
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0answers
19 views

covering gr. house crops during extreme cold

I've grown greens in a gr. house for 22 years. During extreme cold I've put the fabric from Dewalt over hoops. In extreme cold I have 6-8 of these covers on but the next day I have to dry these ...
1
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0answers
17 views

Small greenhouse humidity maintenance

I have a 10x25 foot greenhouse and I am looking for a way to keep the humidity level up in the space. I tried a second hand humidifier but it doesn't seem to be working very well. I want to try using ...
2
votes
1answer
45 views

Broadleaf evergreens for an unheated greenhouse?

I have built a small greenhouse (unheated; Canadian zone 5). I built it so that I could have a place to go in winter where there are green leafy things to look at. What are some pleasant-looking, ...
4
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3answers
68 views

Plastic sheet for greenhouse

I'm trying to build a DIY greenhouse and have a question about the plastic sheeting. I see that no one is using clear plastic - it's almost always translucent. Is that on purpose or just that the ...
4
votes
1answer
797 views

Big cactus identification and how long does it take?

I found these huge cacti in a garden-center, the two on the right. The largest in the back was over 1.5 m in length! They were a little bit too expensive, so I thought maybe start from seed... What ...
2
votes
1answer
86 views

small cucumbers shrivelling, turning yellow and dying

They are an all female variety, regularly watered, in a greenhouse with plenty of light. Door and window open every day. Started with lots of small cucumbers and only 3 have fully developed, the rest ...
1
vote
1answer
39 views

How am I supposed to attach wires in a traditional greenhouse?

I've been given this nice greenhouse. I've always seen other people have wires in theirs to conveniently hold canes etc in place, so I'm surprised I can't see obvious attachment points. I'd imagine ...
4
votes
3answers
74 views

How to setup a green house that loses heat but not humidity

I'm deciding to build a green house to grow some of my favorite plants. My place is quite hot and dry, and water is very precious. My priority is to keep humidity inside. But I couldn't find a ...
3
votes
0answers
79 views

Why does my tomato plant have tightly shrivelled green leaves?

I have a Tomato Grafted Stargold F1 (Yellow Cherry) growing in my greenhouse. It has been in there for several weeks and it seems to have grown taller but all the leaves are very tightly curled in. ...
4
votes
1answer
262 views

Planting vegetables in ground vs pots in greenhouse

What makes the most sense for growing vegetables (tomatoes/peppers/squash/etc) in a new, small 6ftx9ft greenhouse in a hardiness zone of 6? Removing the grass inside and then... Planting plants at ...
4
votes
2answers
179 views

Should rain water be allowed to flow directly into greenhouse?

I see a lot of talk about storing rain for later use in a greenhouse... But what about letting the rain flow into the greenhouse instead of storing it? If a small 6'x9' greenhouse has gutters, would ...
3
votes
1answer
231 views

Which way up does capillary matting go?

I have purchased some capillary matting to aid with watering in my greenhouse. It is the first time that I have used such a product and I have a rather novice question as a result. Which way up should ...
6
votes
1answer
48 views

How do you grow a plant not in your hardiness zone?

I understand that greenhouses are an option, this question is more towards being able to grow plants that normally prefer colder climates without having to spend loads of money on climate control. I ...
2
votes
2answers
49 views

What are the benefits of greenhouses and how do they work?

What are the pros and cons of greenhouses and how do they work? What are their limitations? How does one plan and build one? What is necessary to maintain the plants inside optimally? I am in Central ...
2
votes
1answer
88 views

Are green plastic bottles suitable for making a cold frame/greenhouse?

I've been saving up green plastic bottles for a few weeks now with the vague intention of recycling them to make a cold frame or greenhouse. Are green bottles ok to do this with, or would they need to ...
5
votes
1answer
63 views

Greenhouse positioning

When building a greenhouse, we can all reckon that it should get as much light as possible (with proper heat ventilation). BUT, let's talk about when a greenhouse must be built near shade. Consider a ...
1
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0answers
39 views

Is there any Tyvac like moisture permeable greenhouse film available?

I don't know if this is the right forum to ask this but this seemed most related. So is there a breathable (allows moisture escape but doesn't allow water, CO2 or air to pass through) fabric-film ...
4
votes
1answer
46 views

Should I make a mini-greenhouse for my temperature-sensitive bonsai?

I have a 5 years old Fukien Tea, which just arrived in home. I live in the south of Spain, and my city has strong temperature changes. The temperature goes aprox. like this: Spring: 20 - 25 º Celsius ...
6
votes
2answers
77 views

Recommendations for how to equip a small home greenhouse?

As I prepare for fall around here (USDA zone 8a, max low ~10f, average low ~45f) I long for a greenhouse to bet overwinter some of our showy pots, and perhaps get a jump on some annuals and veggies as ...
3
votes
1answer
616 views

For a Greenhouse, would PE plastic cloth be suitable for a cheap sollution?

I,ve always gotten along just fine without a greenhouse. Recently I've found the need to wanting a greenhouse, cheap but also large that can at least hold up for a couple years or more. Ive recently ...
4
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0answers
565 views

Do tomato plants like temperature and humidity changes?

I am growing some tomatoes in pots in a toy greenhouse. I've put a thermometer/ humidity meter inside. The relative humidity changes from around 55% to 75%, and correspond to highest temperature of ...
7
votes
1answer
197 views

Building Gothic High Tunnel (Elliot Coleman style) in Alaska

I'm in the middle-phase of planning an Elliot Coleman gothic hoop house. I have ordered the pipe bender from JohnnySeeds.com and am wondering if anyone has any experience in building in a cold ...
3
votes
2answers
50 views

Sizing a hothouse

I have a very long term stretch-goal of being able to produce enough plants to fully meet my families nutrition needs. I'm in Auckland, New Zealand - equivalent to USA hardiness zone 9b. I'm aware ...
5
votes
1answer
1k views

How can I tell if my greenhouse plastic film is facing the right direction

I just built a polytunnel with pvc pipes and special greenhouse film. This film has an inside and an outside. I'm pretty sure the text on the film that says 'inside' was facing the correct way when ...
5
votes
1answer
394 views

DIY Greenhouse Shelving

I have a 6'x6' greenhouse structure built of 6' "zinc plated slotted angle". I will likely build the shelving structure into the building frame using the same angle pieces in 6'x 2' segments. Does ...
2
votes
1answer
121 views

What type of plastic covering would be good for a heated greenhouse in the winter?

Can anyone tell me their experiences with different plastic coverings for greenhouses. This year we've built the structure (I've got to get a picture for you) with the vegetable garden growing ...
3
votes
0answers
273 views

What is this substance that looks like red sap on my cucumbers?

I have this weird red sap on a few of my cucumbers. I was wondering if anyone has seen this before? These cucumbers were grown in our conservatory in the back garden (facing south) in pots, grown up ...
6
votes
1answer
202 views

Should I cut tomatoes once they reach the top of the greenhouse?

I have tomatoes in a greenhouse. Most of the stem is fortified with a curled rod, so they don't break under the weight of their fruits. Now they have outgrown their rod and are reaching the top of ...
6
votes
4answers
157 views

Material choices for DIY greenhouse

I'm looking into building a cabinet sized greenhouse for my balcony. I have a very limited income so its a low budget project. I have looked at ready-mades but none fit my budget or space. I'm a bit ...
7
votes
2answers
81 views

What are colors other than clear suitable for avoiding the heat inside a greenhouse?

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
132 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 ...
6
votes
2answers
62 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 ...
8
votes
2answers
727 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 ...
5
votes
1answer
831 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
65 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 ...
9
votes
3answers
2k 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 ...
5
votes
3answers
178 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
84 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)?
13
votes
1answer
223 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 into ...
0
votes
2answers
51 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
54 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. ...
3
votes
1answer
39 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
64 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
619 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
464 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
353 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
91 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 ...
4
votes
1answer
4k 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?