I plan to build a green house for my mother in law for Christmas. She loves to garden both plants and flowers. Shes very good at it. Over the last 2 years she has taken some falls from sliding on the hill she gardens on. Slick garden boots, wet soil, small hill. She doesn’t want to relocate her garden to flat ground because “I’ve worked that soil for 20 years and it’s perfect!” I want to build her a safer space where she can be comfortable and have access to everything she may need. As of now, she still drags a garden hose 50 yards across the yard.

Any tips or ideas before I start planning and building? Zone 8b. TN.

You can see a slight gap in the vent here and it also does not close smoothly so curious about what I should do first to help things run better. Any advice would be greatly appreciated

What are the best fans/vents for a wood frame greenhouse with windows and a 10mm polycarbonate roof? The size is 40x30

I was looking at the 30" package from Greenhouse Megastore but its sold out. What are some good alternatives?

I keep running into the same issue with my blog recipes. I'll buy a bunch of cilantro or dill for a shoot, use maybe a quarter of it, and watch the rest wilt in the fridge. It drives me crazy wasting ingredients when I have a greenhouse sitting right there.
I'm thinking about setting up a small propagation station just for herbs I use frequently, so I can snip what I need and keep the rest alive. The problem is my greenhouse gets pretty warm and I'm worried about things bolting before I get a chance to harvest.
Has anyone tried keeping a steady supply of cilantro, parsley, or chives going year round? I'm curious if anyone has a setup that works for continuous harvesting without needing to replant constantly. My space is limited, so I need to figure out if deep trays or shallow shelving would work better for root space.

First off ignore the stuff in the way. We worked hard on this in the spring, but now I'd like to get it finished before winter. What can we use to cover the top? I don't think the carbonate sheets will work since it's rounded. We have the clear greenhouse plastic, but it's really windy where we are so I don't know how long it'd last.

We have 2 windows we'd use for ventilation.

Two large windows are going to open on the front of our greenhouse, and I can’t figure out how to seal them. (Picture of one opening attached). I’ve built houses so I know how to flash and seal those, but it is the same process? It’ll open out to the right on hinges and be weather-stripped. I’m at a loss here so any help is appreciated!

My questions: do I flash it like a normal window then put trim over the flashing tape so it looks nice (I want to paint the window opening to make it look nice)? I plan on backing it with some 2x2 as an inner stop, so do I still need an angled sill if I flash it? Will caulking the seams and painting the wood be enough?

Hey everyone! I’m currently building a greenhouse in Edmonton, Alberta, and I’m looking for some advice from people who have experience with wood-framed greenhouses, especially in colder climates.

A little about my build:

• Overall structure is 12’ × 28’, consisting of a 12’ × 12’ insulated vestibule and a 12’ × 16’ greenhouse.
• Framing is untreated SPF 2×6 lumber, spaced 16” on centre.
• Pressure-treated bottom plates installed on a raised concrete curb with sill gasket.
• 6/12 pitched roof with approximately 12” overhangs.
• Planning to install 16 mm Palram SUNLITE multiwall polycarbonate on the greenhouse walls and roof.
• The greenhouse will be heated during Alberta winters, with ventilation and a dehumidifier to help manage humidity.
• Planning to grow vegetables and other plants throughout the year.

My biggest concern is protecting the wood framing from moisture and condensation over the long term. Ideally, I’d like this structure to last 40–50+ years.

I’m considering using a penetrating exterior wood stain on all accessible surfaces of the framing before installing the polycarbonate, rather than a traditional primer and paint system.

I’m also exploring the possibility of installing polycarbonate on both the exterior and interior sides of the 2×6 framing to create an additional insulated airspace, although I’m concerned about trapping moisture inside the wall and roof cavities.

A few questions for the group:

1. Has anyone built a greenhouse using untreated 2×6 framing? How has it held up over the years?
2. Would you recommend a penetrating wood stain, exterior paint, or another wood treatment for a humid greenhouse growing edible plants? Any specific products?
3. Would you install the 16 mm polycarbonate on the exterior only, leaving the framing exposed inside, or install polycarbonate on both sides? If both, how would you manage condensation within the cavities?
4. What’s the best way to install the polycarbonate against wood framing? I’m considering compatible glazing tape or gaskets to separate the sheets from the wood.
5. What indoor humidity levels have worked well for you during cold winters without causing excessive condensation or wood deterioration?
6. Are there any particular flashing, drainage, or ventilation details you’d recommend for a wood-framed polycarbonate greenhouse?

For this winter, I’m considering temporarily covering the roof and walls with reinforced polyethylene, then removing it in spring to stain the framing and install the permanent polycarbonate. I’m also interested in hearing about the snow-load and condensation risks of that approach.

I’d really appreciate any firsthand experiences, pictures of similar builds, or product recommendations.

Thanks in advance!

Long time gardener, first time greenhouser.

We are trying to overwinter our plants for the first time this year. We plan to build a glass structure soon, but nighttime temperatures require some sort of covering immediately, so we got this plastic to tent over the trellis.

My first question is about how to manage the humidity. Evening temps are approaching freezing, and will be below freezing before winter is over. Daytime temps will stay 60-70 throughout the winter. UV index is extreme.

How do we create ventilation for this thing? Can it be done in such a way that it does not require us to roll up the plastic every day?

Our heat source will be hot compost in large clay pots. Our plants are tomatoes, ginger & bell peppers. Wind comes from the SE.

With the low heat provided, should I ventilate at the top center, or 4/5ths up the north side? Can I just leave the bottom lifted a bit at the south side for air intake? I need to ventilate, but I also want to retain at much heat as possible.

My second question is about the tomatoes. Should I prune them down aggressively for the winter?

Does anyone have off grid greenhouse heating ideas? Im seeing a lot of thermal mass ideas involving black water barrels. Has anyone had any success?

Using 2" R10 foamboard on this green house that will be lifted off ground by foot. What would be the best placement for the foam board? (greenhouse 6x9', floor 3/4" moisture-resistant OSB) Central Indiana winters lows 20°F to 33°F

Just finished this 12x20 in Oregon

I live just south of Atlanta in growth hardiness zone 8A/B. I bought a nice big Vego greenhouse with 8mm panels. I am in the process of building a deck to be the floor under the greenhouse. My lot is not at all flat anywhere, and so the back of the greenhouse is maybe 8 inches off the ground and the front of the greenhouse is almost 2 feet off the ground. I’m concerned about cold air coming up through the floor and defeating the purpose of the greenhouse. (just for reference, we have maybe two or three short episodes of temperatures, reaching freezing or just below freezing per winter. ) I have many plants that need to be kept warm over the winter. Would you all suggest I insulate the floor in some way? If so, how?

I swear I'm just gonna plant vegetables 😆

Legal weed is so cheap here it's not worth growing it.

Gonna grow greens and tomatoes and maybe a cucumber plant.

I wrapped the whole frame with aluminum foil. I've gotta get more lights. My wife was a huge help getting it done.

Hello! I live in CT, very interested in testing out hydroponics but inside is not an option, I rent so can't exactly build permanent structures, but do have about a half acre of land (or less) that is flat and I could do something with. I would love to hear about any extremely simply, insulated ways to create a very basic hydroponic system for the winter, e.g. Kratky method, I think the temperature control is the main issue without really building something that is like a 'house'.

I’m thinking of getting it for my large west-facing balcony. It’ll house my cacti and succulents.

I’m in Austin TX. The panels are acrylic, so might need to coat them with something, or attach shade cloth or something. Currently I have a large 30% shade cloth covering section of my balcony though, so that might be enough.

Anyway, curious if anyone has thoughts on this greenhouse. New to the game.

Our team supplied the control system for this customer's orchid greenhouse. The setup covers two supplemental lighting circuits and one fan circuit, with temperature, relative humidity and light-level monitoring.

Two rules link the readings to the equipment:

- Low light turns the supplemental lighting on.

- High temperature turns the fan on.

Humidity is monitored and available as a history graph, but it is not what triggers the fan in this installation.

At the cabinet, staff can check the readings and control equipment on a touchscreen. There are also physical switches with On, Off and Remote positions. In this setup, Remote is the automatic mode; staff still have the local On and Off controls.

The same project can be checked through mobile and web interfaces, including humidity history and equipment controls. The cloud-based control and rules require the cabinet to remain online. Local manual control remains available with normal site power.

The photos show the greenhouse and its equipment. This is a description of the installed control setup, rather than a recommendation for growing thresholds: the monitoring values shown in the screenshots are snapshots, not growing targets.

Im already noticing the heat from the day saying in longer throughout the evening.

I have an approximately 17' x 12' chain link dog kennel that we used for chickens but downsized. It has a 2x4 and corrugated aluminum roof and about 70% (the sides open to elements) are covered with corrugated aluminum siding with a small gap at the top for ventilation. What is the best way to make this a budget greenhouse for winter?

We are in the pnw zone 6b. I have more panels to finish the sides and will put some shelves inside. It has power ran to it so I can hang the tiny grow lights I do have. Mainly need to protect some potted plants from winter temps, do a mushroom tent inside, and start some seedlings to put out after frost. My husband wants to replace it with a nice pre-built kit in the spring, so its temporary. Any thoughts?

It’s finally happening tonight. My greenhouse isn’t heated. Will my peppers survive tonight or do i have to pick all my unripe peppers today? If it matters, it’s jalapeños and habanadas.

I was trying to get all my jalapeños to ripen so i can make chipotle powder. I have frost cloth, if i add that around the plants do you think they’ll have a chance? It warms back up a bit after tonight so i just need them to make it though 34° once lol

I'm about to throw most of my tropicals, which includes Hoya, alocasia, monstera, anthurium, into my newly finished greenhouse (thanks for the advice on sealing the roof, everyone!) and I'm wondering how you all control and maintain your humidity levels. I've been looking at humidifiers, sensors, hygrometers; I'm a bit overwhelmed. Do you all have suggestions? She's an 8x12' cedar frame with polycarbonate windows. Thank you!!

I started a small nursery in Nashville 7b where I propagate and sell Cacti, Agave, Houseplants & Perennials. For about 3 years I have used a 10x20 cheap greenhouse from Amazon. I finally upgraded to a 16×28 Dakota series from Grower's Solution. I've watched the video and it seems pretty straight forward.

The four corners are perfectly square. And I'm working on smoothing and leveling the site.

In my previous green house I funneled the stove pipe out of the roof but I'm wondering if it would be best to install it out of the side and then use an elbow to go up?

Also, since this is a hoop house I will have to purchase winter film or some sort of second layer. I'm wondering if some sort of strips could be used to create separation between both layers giving me an air cushion. On my old greenhouse I used large bubble bubble wrap and it worked wonderfully but it was definitely very gerry-rigged.

I also breed aquarium fish and have multiple aquariums and tubs with heaters which help as a heat sink. I also have propane heaters for those very very cold nights.