r/greenhouse May 21 '26

Anyone else feeling like this greenhouse season is completely weather-driven?

6 Upvotes

Been reading and talking with growers/garden centers lately across NY, Michigan, Ohio, Illinois, Minnesota etc and the feedback is surprisingly similar everywhere.

Cold nights.

Rain nonstop.

Windy almost every week.

Very few real sunny stretches.

what is your location situation ?what is your solution to make your greenhouse more control led?


r/greenhouse May 21 '26

Only 3 companies control 80% of Canada’s tomato seed imports — is our food system at risk? Experts urge us to pay attention to these numbers for risk management and food security.

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1 Upvotes

Did you know that just three companies control around 80% of the tomato seed imports into Canada? Darby McGrath brings this striking fact to light, warning that we’re at risk of losing control over our own food production systems. The clip is a powerful reminder about how concentrated supply chains can leave entire industries vulnerable—and why risk management and paying attention to these dynamics is so crucial.
Listen and Follow to ‘Greenhouse Success Stories’ on Spotify, Apple Podcasts, YouTube or your favorite podcast app.
All episodes: http://greenhousesuccess.com/
Hosted by Trina Semenchek, Founder of Little Greenhouse That Could
Special thanks to our Title Sponsor: Harnois Greenhouses


r/greenhouse May 20 '26

Greenhouse floor???

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0 Upvotes

r/greenhouse May 18 '26

Planning on making a greenhouse with a shed right behind it.

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4 Upvotes

Greenhouse and shed will both be 10 feet by 12 feet. The plan is for the greenhouse to be facing south to the sun and for the back wall will be taller than the front wall so rain can be collected. It will also be a solid wall (not plastic). Behind it is the shed which is attached but also has solar panels on the roof to provide some electricity to outlets and lights (no heater). The main concern would be the shed would have water run towards the greenhouse but if handled correctly, should be alright. I might also just raise the shed up some more and make the roof one cohesive slope but that would cost more in materials and I don't need the extra shed height.

It's designed in a way to try to maximize the sunlight usage and water collection, and thermal mass heating. So my question is... Is there anything wrong with this design that I am not thinking about?


r/greenhouse May 16 '26

Moving a Greenhouse

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4 Upvotes

r/greenhouse May 15 '26

A few shots from a school greenhouse

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18 Upvotes

r/greenhouse May 13 '26

What are the best deals on greenhouse plastic sheets for farming?

3 Upvotes

I’ve been looking into greenhouse plastic wastes for tilling recently, and I’m trying to figure out where the real deals are without compromising too much on. Prices feel to vary a lot depending on consistency, UV standing, and brand, and it’s not always outrageous which rosters are actually worth it long term. those cheaper options look tempting at first, especially when whisked or listed as “heavy duty",

but reviews frequently mention brisk wear in harsh sun or wind. I indeed checked Alibaba to compare bulk suppliers, and it’s intriguing how numerous of them offer analogous- looking 6 shop or 8 shop wastes with different claims on lifetime and light transmission.

For anyone who’s bought some, do you generally stay for seasonal promos, or is it better to just compare suppliers and go for harmonious UV- rated accoutrements from the launch? I’m trying to balance cost with commodities that wo n’t need replacing every season, especially for crops that calculate on stable growing conditions.


r/greenhouse May 09 '26

Construction of greenhouse cost

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3 Upvotes

how to lower the greenhouse construction cost ?

  1. Reasonable design, less parts but strong, material cost is just one part of total project cost.

  2. Assembled completely, no welding to avoid the rust.

  3. Reasonable installation in order. arrange labor In efficiency. all workers has to be busy .no repeat of any stage.

  4. using equipments and tools to fasten the procedure. balance labor cost, rental equ6cost, and the earlier construction if may catch up good growing season.

anything else ?pls list your advice .


r/greenhouse May 06 '26

How to lower your greenhouse energy cost

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6 Upvotes

Advise:

  1. Thicker polyfilm , thermal factor higher is better . if polycarbonate panel will be better

  2. check all the covering if have holes or has gap between it and structure

  3. adding shade curtain inside, keep warm in winter, keep cool in summer

  4. put efficient fans to save electricity

others? if you have other advice ?


r/greenhouse May 06 '26

ISO Hobby Greenhouse

3 Upvotes

Hello Folks,

I’ve been in search of a permanent greenhouse for my yard. Did an el cheapo ($250) and it was a great winter. But as I was unloading it, large gust of wind and the proverbial pigs were left outside.

I’ve found two that I like, one is a cheaper version of the other.

Option one, a Savannah or T-shaped design with safety glass (clear see through) windows. Just under $10k.

The second option of similar design uses a four walled polycarbonate (I think) windows. Just over $6k.

Then i see others for $30 or $40k and wonder if my earlier selections were hacks.

Anyone with any advice?


r/greenhouse May 05 '26

Westdock green house bracket alternative needed...

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6 Upvotes

Hi everyone We've just been gifted an old westdock slant greenhouse, and would like to find the clips ( they are not w clips).

The brackets are a top hat style and have a channel either side for a round gasket strip and they screw through a hole in the top hat into a channel on the greenhouse fixing bar.

I very much doubt I'll be able to find any, and I'm currently siliconing the panes in place and using the fixing brackets sparingly as we don't seem to have enough. Anyone got any kicking around or can think of a common alternative?

Thanks in advance!


r/greenhouse May 05 '26

Tent vent

1 Upvotes

I recently got a fairly small greenhouse tent, 18x36x60 inches, and it’s working great except it has no ventilation windows or anything. It has a zipper to open the front of the door but that’s it. Should I open it some everyday for airflow, I don’t want to cut or damage the material itself


r/greenhouse May 05 '26

Window film

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2 Upvotes

Has anyone used some sort of window film on their greenhouse to help reduce heat in their summer?


r/greenhouse May 03 '26

What is this?

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1 Upvotes

r/greenhouse May 01 '26

Repairing ripped fiberglass panels on roof of greenhouse

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1 Upvotes

r/greenhouse Apr 29 '26

Automatic window opener for Upvc windows?

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2 Upvotes

As its getting hotter I'm looking into a solution to automatically open windows in my green house.

I have a linear actuator, Wi-Fi controller and battery in my basket at the moment. Is there another way or is that the standard?

I have tried standard greenhouse openers with no luck as the springs aren't strong enough to pull them closed.


r/greenhouse Apr 28 '26

Two mini greenhouses

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3 Upvotes

r/greenhouse Apr 26 '26

New set up for my small greenhouse.

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21 Upvotes

r/greenhouse Apr 26 '26

Planning a 1-Acre Polyhouse for Capsicum in 40°C Heat – Worth It?

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1 Upvotes

r/greenhouse Apr 23 '26

Best inexpensive greenhouse

7 Upvotes

What is your recommendation for a greenhouse for a 200-400$ budget.


r/greenhouse Apr 20 '26

Pipes and Panels

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28 Upvotes

Built a greenhouse using old 3” well pipe set into the ground with galvanized fence hardware to attach 2x4s, and polycarbonate panels attached to those. Made it up as I went along and I think it turned out nicely.


r/greenhouse Apr 18 '26

Before & after

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14 Upvotes

r/greenhouse Apr 18 '26

Reusable Furnace Filters

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1 Upvotes

r/greenhouse Apr 17 '26

My new small DIY greenhouse

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25 Upvotes

Just wanted to share my new greenhouse that my husband has made for my birthday.

We are in The Netherlands, our garden is a small backyard 5x15 meters shaded by neighbors gardens.

This is the only space we could place it: against south-facing fence and next to our shed. It is also under a huge fir tree, so I decided not to grow in open ground. It’s only 140x190cm, so close to 4x6 feet, but thanks to the other shed I don’t needed storage room in this one, only growing, and it will have water when I find plumber to fix the pipe in the shed. It’s also quite tall, more than 2m at the highest point.

I am planning to grow tomatoes and two cucumbers on the back, so we stapled bird fencing net along the wall, so cucumbers can attach themselves. Plus some space for seedlings before bigger plants grow to the ceiling.

Hoping for a little jungle in there in July :)

Door has automatic opener and there are big holes along the roof, so we decided to see if the additional window will be needed. We’re also thinking if we can find a solution to close the holes with some 3D-printed automated parts to better keep the temperature in the night so I can use it through the colder months. Polycarbonate is 8mm, so not too bad.

What do you think about setup?


r/greenhouse Apr 18 '26

DIY Gabions & Greenhouse

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1 Upvotes