Category Archives: Projects
For years I’ve had great plans to build a garden trellis for my many varieties of grapes & kiwis – and finally this summer I took the plunge. I built a simple, but solid trellis for the vines I have growing along the south side of my garage. It’s probably a little bit over-kill, but it’s certainly able to hold the weight of all my grapes and kiwis (which is actually pretty significant – as I have two grape vines and two kiwis and all those vines, leaves, and fruit can get heavy!)
So if you’ve been looking to build a trellis in your own backyard, let me show you my design:
First of all – my materials list.
- (3) 4 x 4 x 12′
- (1) 4 x 4 x 8′ – (since my one section is under my garage window)
- (17) 2 x 4 x 8′
- (1) 2 x 4 x 12′
The first thing to do was to dig my post holes. I dug 6″ holes about 32″ deep – spaced 4′ apart – about 1′ from my garage wall.
The 12′ posts were too tall to fit beneath my garage eaves (even when planted 32″ deep), so I had to trim a few inches off the tops to fit just under my eaves. I had a window (as you can see in the picture below) that I didn’t want to cover up, so I planned to build that section at half height. Once the posts were in, I backfilled with gravel and tamped them in. You could use concrete if you like, but I think gravel holds it just as well (if it’s well tamped) and it allows the water to drain away from the post so it doesn’t rot.
Once the posts were all trimmed to the proper, level height, I simply attached the 12′ 2 x 4 to the top of the taller sections, and a 4′ section of 2 x 4 for the shorter one.
Hoop-frame greenhouses are amazing! If you’ve been following my blog for long, you know I love my greenhouse. But as good as it is, I wanted to make it even better. I wanted to extended my growing season without adding a the cost of a heater. In 2009 I tried using milk jugs full of water to hold the heat and slowly release it through the cool of night. That worked pretty good. But what else might I try?
Well, here is what I did this spring: Now this probably isn’t a brand new idea. I’m sure someone has done it before, but its new for me. (And maybe for you too.) I decided to make a mini-greenhouse WITHIN my greenhouse.
It was fantastically easy (it took all of ten minutes to build it) – and completely inexpensive – I simply used materials that were leftover from other projects. Here, let me show you…
I just took six planks (1x6s – about 30 inches long that were leftover from my fence project last fall), and tucked the bottoms inside my planting bed frame. Then I screwed the tops together and attached a long 1×2 (8 ft long) that served as the peak of my greenhouse. It was absolutely simple. Then I just took and threw over some plastic like this…
Then I ran some tests to see just how much of a difference it would make at night. Remember this is with NO additional heat.
On the night of May 2, the overnight temperature got down to 3.1° celsius outside in my garden. The greenhouse was a little warmer, going down only to 4.8° celsius. But inside my mini-greenhouse within my greenhouse, the temperature stayed up at 7.4° celsius. That’s 4.3° warmer than outside with NO extra heat. That might not seem like a large number, but that makes a significant difference in your growing season. That little, inexpensive “greenhouse within a greenhouse” project, according to the weather almanac, could have just added 9 days to my growing season – for FREE!
And of course, if I had wanted to heat that little greenhouse, it would be much cheaper to heat that little space than to heat the whole greenhouse. So maybe I’m over-reacting, but I think this is way cool and will doing this project again next year – nine days earlier!
As I mentioned in one of my recent posts, I recently returned from vacationing in the Kootenays of BC. And one of the very cool things that I saw was a non-profit community garden. The Lakehead & Beyond Produce Society has got a great little garden and greenhouse that not only provides fresh garden vegetables for their community, but it also generates employment opportunities and improves the overall economic well-being of the area. I think it’s a great idea that would work well in many small communities.
Here’s just a couple pics to give you an idea of what they’ve got going out there.
How does it all work? The basic idea is that individuals or families can ‘subscribe’ to a weekly delivery of fresh garden produce. So every week, you receive a box full of whatever produce is available that week. So early in the season you might get spinach, radishes, chard, rhubarb, and various herbs – then later on onions, tomatoes, peas, beans, corn, carrots – and still later you’d get garlic, beets, cabbage, etc… Kinda cool, huh?
So I was just wondering, is anyone else doing this sort of thing? Or, perhaps you are interested in starting one of these in your community? Drop me a line!
Well, not that long ago I showed you that a hoop-frame greenhouse could survive a Canadian winter. I should probably add “so far” to the end of that statement. We had a whole pile of snow (by central Alberta standards) over the past two days and I was away and thus unable to brush off the snow that was piling up on my greenhouse. So I was a little worried when I looked out this morning and saw my greenhouse looking like this.
The snow had accumulated on the top enough to start bending the pvc pipes and the roof began sinking. This is what it looked like inside.
On one hand, I was sad to see it getting squashed by the snow like that. But on the other hand, I was over joyed to see that although it had bent, nothing had broken! Everything was intact – just a little bent out of shape. So here’s another positive for using PVC pipe. It can bend quite a bit, still not break, and then resume it’s shape again when the pressure is off.
So I took out my shovel and scraped the snow back from the sides and brushed the snow off of the roof best I could. Some chunks were frozen to the plastic at the top, and I didn’t want to risk wrecking the plastic, so I left some up there. But the warm weather that will come eventually, hopefully, should melt that away.
While there certainly are some risks to this type of greenhouse structure (after all, I do live in Canada), and we’re not out of the woods yet (still six more months of winter… well, three at least), I still stand behind my PVC pipe greenhouse.
It’s December 12 in Central Alberta. Last week brought a lovely little blizzard with high winds and a whole pile of snow and this weekend we are looking forward to -35°C. Yup, must be winter. So, I figured it would be a great time to check on my little greenhouse. You know the one – the hoopframe greenhouse I made out of PVC pipes and covered with woven poly. Some people weren’t sure it would stand up the the wind and the snow and the cold temperatures, but I was confident. Mostly. So I ventured out in the -29.9°C weather this morning to see how well things were standing up. Here’s what it looked like:
Not bad so far. How about the inside? One of the biggest concerns is that the pvc pipes would snap or would bend under the weight of the snow. One nice thing is that Alberta snow tends to be pretty dry, so it’s not usually as heavy as the snow in other parts of the country. Regardless, it can still be pretty heavy when piled up. Well, here’s the inside.
Things are holding up well. Nothing has snapped, there is no major bending going on – all is bright and well. And, for an added bonus (for what it’s worth), it was -18.7°C inside while -29.9°C outside. Still really cold – but certainly a wide spread (and this only at 10am – by 2pm it should be significantly warmer from the sun).
So I must say I am pleased. I think this greenhouse is my best to date and I am excited to get some plants started out there earlier than I ever have before! I’ll keep you updated!
Update at 1:00pm later that day:
Ok, now it’s just -27°C outside, but a scorching -10°C inside! That’s 17 degrees people! Does that not impress you? I does me. I’ll have tomatoes in February!… Well, that might be a little wishful thinking…
I’ve finally built my greenhouse for my new garden. It’s a twenty by twelve foot hoop-style greenhouse with wooden ends and is covered with 11 mil woven poly. This greenhouse has some pretty cool features that I really appreciate, and I think you will too.
First of all, the poly I used to cover it is fantastic. It is a super tough woven poly that I got from Northern Greenhouse out of Manitoba. How tough is it? Well, my brother (who operates the Saskaberry Ranch near Sundre) just got pounded by hail last Sunday. The hail broke windows, shredded siding, and striped everything off of his saskatoon and raspberry bushes – but his greenhouse covered with this same woven poly was completely undamaged! Amazing! (I’ll try to post a picture if I can get one.)
Secondly, to eliminate wear and tear on the plastic, I covered edges of the wooden ends with copper pipe insulation. This foam protects the poly from the sharp edges of the wood.
Thirdly, it was very inexpensive and easy to build. The lumber was under $100, the poly was just over $200, and the pvc pipes were under $100. By the time I got all the misc. stuff, I was still under $500 total. Not bad, eh?
Being so late I only got a single row of tomatoes down one side, but next year I’ll be bursting at the seams once again! If you want to build a greenhouse like this one, check out my previous post that gives step by step instructions for building this same greenhouse. Since I’ve improved the design since then, I would recommend the following changes:
- Use wooden ends instead of plastic – and cover the ends with pipe insulation.
- Use 11 mil woven poly instead of the 6 mil.
- Put the PVC pipes on the inside of the frame rather than on the outside
Other than that, you should be able to follow all the other steps. If you do follow this design, be sure to leave me a comment – I’d love to hear (and see) what you’ve been doing!
Enjoy this post? Send a donation to help keep my garden growing!
Today is certainly a sad day. After much work in building my A-frame greenhouse and covering it with plastic, a gusty afternoon storm has ripped my plastic in pieces. I’m afraid the six mil. plastic simply wasn’t strong enough. As the wind pushed against the plastic, the plastic simply stretched to the breaking point.
Eventually, one of the holes along the northwest corner tore right off, and the wind ripped the plastic right down the middle of the north side.
So I’m a little disappointed. Even if I could patch it back together, the plastic is just too thin to withstand the winds. So I may be greenhouseless this year.
But perhaps you can help. If this blog has been a benefit to you, would you consider sending a donation to help cover the cost of new greenhouse plastic? The long-lasting woven poly that I would like to put on my greenhouse will cost about $500. If I can raise that much money in the next two weeks, I’ll be able to order it and hopefully get it up before the hail season begins. If more than $500 comes in, all extra money will go towards a local kids camp. Just click the flower below to help keep my greenhouse growing!
Update 2009: I’ve learned my lesson and got the good plastic. Check out my newest greenhouse! It’s made it through some major wind already and is looking good!Enjoy this post? Send a donation to help keep my garden growing!
As of today, phase one of my giant A-frame greenhouse is complete. It stands about 12 feet high, 24 feet wide, and 48 feet long. I have a single layer of 6mm plastic on the north and south sides with the ends currently open. I plan to enclose them before the frosts this fall (that’s phase two), but I’ll leave them open throughout the summer.
The entire structure is built on top of fence posts. I did this because my lumber wasn’t treated – this way the wood won’t sit on the ground a rot right away. The lumber for the structure is just rough 2×6 boards that I got for a real deal. It’s in pretty rough shape (warped and cracked), but it’ll do for this purpose. It’s cross-braced by some wire my father-in-law had, and the the plastic cost a total of $80. The raised beds are made with 2×10. All said and done – it cost me about $160, plus a good chunk of my time. I’m glad I’m done this far – it was a lot of work. Now I get to do the fun part – planting, growing, and enjoying!
Originally I was going to have a water trench down the middle to for heat storage, but with small children around I opted for a compost trench that should let off quite a bit of heat anyway. Well, see how it goes.
I’m not sure how well the plastic will stand up, but I’m hoping it’ll last the year anyway. If it doesn’t, I’ll have to pay for the more expensive (but much better) 11 mils woven poly.