I've loved gardening since before I had space for it. I tried growing succulent clippings, abandoned house plants, and even some redwood saplings on my smog-choked 3rd floor patio in Oakland. When I moved out to the Sierra Nevada foothills, I definitely wanted some space to tend. It's hard to find a spit of land out here that doesn't call out to your inner homesteader. Yet I passed up a property a fancy hoop-house arrangement in place. I chose a parcel with mature fruit trees and a lot of potential instead.
I was quickly made aware of the challenges for would-be gardeners out here: balancing enough sunlight through the forest canopy against having enough shade to stave off the summer sun, plumbing irrigation to anything edible, and defending my share of the harvest from wildlife. I continue to iterate and learn from locals on how to best serve the garden. But this year I made a major advancement by building a little greenhouse next to my shed.
Having tackled the greatest hurdle of getting a place to cultivate, I found myself struggling with the art of transplanting seedlings into the soil. Of course I can get nursery-or-garden-sale plants, but it's expensive and it feels like I miss half the experience of raising plants-- especially when it comes to seed-saving. Heirloom seeds are given out freely in the local ag community. It'd be a shame if I could never get them to thrive.
Each year I'd get excited about the coming season. In January or February I think about what I want to grow. I make spreadsheets and prep my saved, swapped, and purchased seeds, and get gassed up by the false spring we always seem to have in Northern California. I'd start my seeds inside under an old T5 grow light I'd gotten for free off Craigslist. The shoddy folding grow-table was set up in my home office. The flickering on of the timed light would remind me it was quitting time at work. The seeds sprouted mightily, but often got leggy. Watering under the home-made wooden scaffold was tedious at best. And once it was time to harden off mirror I'd find myself with a high seedling mortality rate. It was disheartening. My planting journal seemed to always trail off by mid-June, correlated with my motivation.
Nevada County isn't the worst place for agriculture but it also isn't a cakewalk. Frosts are unpredictable even into May. Blistering summer and the cessation of rain for 4-5 months can arrive weeks after fall. I try to keep logs and attend sessions from the local Master Gardenersmirror to build up my intuition for the climate. Snap peas get planted directly in the ground around Christmas (they love it, even deep snow!). Everyone else, I must remind myself, has to wait at least until April. I've also learned that as long as the seed table is up in my office, the anxiety to get the plants out in the ground weighs on me. And naturally my impatience yields poor results.
It's been hard for me to get excited about this grow setup
This is where a greenhouse comes in. A nice, naturally sunny box can extend viable spring and ease my plant starting. Obviously, I haven't discovered some unknown phenomenon. Surfing Google Maps Street View of agricultural districts around the world shows unending rows of hoop houses. You'd think that all the oil reserves of the earth had gone into the plastic film fluttering over them. While I respect the utility and their ability to provide food for the millions of people on earth, I also wanted the structure to become something I would be proud to have in my yard for years to come. I wanted it to be something that would inspire me to work outside. I also wanted to do it myself.
I may be tainted by the picturesque greenhouses of the cottagecore Tumblr of my youth, but I've always loved the sunny serenity of a wood-framed walk-in greenhouse. There are numerous examples of cute greenhouses sprinkled in yards in my area. These are not the aluminum-rod Walmart polytunnel kits built for function. They are tasteful, if rustic, structures that are meant to serve generations. One sits, well-loved, in the front yard of an old Victorian home on the road into town. Another, built in the 19th century, still finds itself in service of the fabulous rose garden at Empire Mine State Park mirror . And another was built by Velvy Appleton mirror who generously opens his yard for open-air concerts free to anyone who wishes to attend. It was a visit to one of these shows-- featuring two bluegrass musicians if I recall correctly-- that gave me the courage to start building my own greenhouse.
Famous Greenhouses of Nevada County
I'm not a carpenter. While I've been doing my best to learn the fundamentals and gather the right tools, my repairs around the house look shoddy compared to the work done by the previous owner. Before this greenhouse project, I'd tried my hand at small projects-- building birdhouses (crooked but popular with bluebirds!), a small arbor (collapsed under snow-weight), and fixing parts of the deck railing that were crushed by a falling tree branch (functional but ugly). It was Velvy's tour of his greenhouse that told me I could make this project myself.
Velvy, a producer/musician/photographer by trade, also had no formal training on construction either. Despite this, he managed to build a lovely, freestanding greenhouse out of salvaged windows. I was sold. I felt a little bad for zoning out during the bluegrass show. I was already thinking about a design.
While sustainability wasn't fundamental to the project, it is somewhat fundamental to my approach to hobbies. Rather than using all new materials, I wanted the greenhouse to be built out of salvaged windows. I love the look of old windows, especially those with muntins mirror. So, without anything more of a plan (or a timeline) in mind I began accumulating old windows from estate sales, the Habitat for Humanity ReStore, and Craigslist.
The search was serendipitous. If there was a barn sale, a 4-panel window might be hiding beneath lumber remnants and years of accumulated tools. If a Craigslist post had windows listed, sometimes they'd be from the same house but usually at least from the same decade. The ReStore would have an ever changing stock of assorted windows but the price point meant only the pieces that really struck me ended up in my cart. Over the two or three years of lazy aggregation I built a stock of over 20 windows. They sat propped in the corner of my garage, awaiting their time to shine. The problem was, obviously, very few of them matched.
Thus, heralding the second phase of the project, the catalog was born.
I figured that by writing down the dimensions of each window, I could find some synergy between the various shapes and sizes. Surely some of them would be roughly the same size, right? I still didn't have a great grasp of structural framing at this point so the buffer between each window in the drawings was speculative at best. With a little bit of jigsaw puzzling, a lot of pacing around the planned construction site, and plenty of hand-waving, some time in late 2024 I finally determined I had all the window pieces I would need. I accepted that I would need to bend down to get into the greenhouse, but there'd be plenty of room once I was inside.
I also realized I would need to be doing a lot of digging.
Most of my property is on a gentle slope. It truly feels quite gentle until you need to build something level on it. With some amount of trepidation, I began to think about a foundation. Via the magic of hoarding, I had a pallet of cinderblocks handy from a previous project. My first step after measuring out the rough dimensions of the green ouse was to dig out a footing for the blocks.
With a trusty array of shovels, a crusty old level, and a backlog of audiobooks to listen to, I buried and stacked blocks as true as I could manage. Throughout the spring and summer of 2025 I put in scrap pvc pipes for drainage, filled the blocks with dirt (for moral support, really), and lightly mortared everything together. It was a slow-going business with maybe one brick added every few days when time and weather allowed. All the while, I was digging out the floor of the greenhouse to give myself headroom in the future structure.
Once the mostly-square foundation was laid, I had to look at it every time I entered my home. The drive to progress the project was strong. It was time to learn how to frame a building. For this, I consulted a copy of House Framing by John D Wagner and some shed diagrams from the Internet. In the late summer of 2025, I got started. My framing was a slipshod but in the end I was delighted by how I could handle the inconsistent window sizes by means of generous 2x4 jambs, 1x4' casing, and an stack of shims. Most delightfully, I kept all of my fingers attached to my hands.
I definitely hand-picked inspirations from the simplest designs I could find...
Bolder lines == confidence increasing
The first wall I assembled, which happens to be the one facing the gate to the house, was a breeze. Two matching sash windows fit neatly into the space. The long side-wall was the most interesting as it required me matching mostly complimentary windows into six slots. This took some thinking and quite a number of passes with a table saw but miraculously only one broken window in the process.
A window on the ground just begs to be stepped on.
Once the frame was raised into place, I laid each window loosely on the sill. Using the outer framing and a small block on the inside as a wedge, the windows were secured while maintaining some room for thermal expansion wigglery.
Due to the limitations of the space, the doorway ended up being a little bit shorter than I'd have liked. Somehow, as of this writing, I've only hit my head on it twice. I was able to slap together a hobbit-friendly door using a small window and part of an old IKEA coffee table framed by 2x4s. Much to my mother's chagrin, I secured the door to the jamb with three mismatched hinges. But it works! But I didn't realize that with the hook-and-eye latch on the outside my son could lock me inside whenever he was feeling ornery. In short order I hung a screwdriver near the door so that I could Tommy Pickles mirror my way out.
Absolute goblin behavior
After the walls were done, the only structural element left was the roof. I never felt comfortable hanging heavy windows overhead so I took the coward's approach and picked up some translucent corrugated polycarbonate roofing. I layered the sheets over each other to provide a little structural support. My ill-advised six-foot-apart rafters and shitty plastic roof were quickly put to the test in early 2026 when we got knee-high snowfall. The roof sagged but didn't bust. I'll take that as a win.
With the greenhouse fully enclosed aside from some semi-planned-for air hatches, I could now focus on the fun part: interior decoration. As the first false spring on 2026 approached, I dug out the greenhouse floor, laid a bunch of gravel, and started thinking about shelving. Initially thinking I'd need to custom-build racks, a stroll in my messy garage reminded me that I had gotten a shitty "workbench" from the side of the road months ago. I was able to bisect it length-wise and voilà: two-tiered shelves ready-made.
In late February of 2026 I finally let myself start some seeds. I kicked off an experiment to compare indoor-started seeds and greenhouse-started seeds. The trial ran all of one week before my T5 grow light gave out and I just took everything out to the greenhouse where the other plantlets were thriving.
I don't think I ever believed I could complete this project and feel pride in it. Yet here I am with a relatively spacious greenhouse that holds at ~20F warmer than the outdoor air and doesn't look like total shit. I started tomatoes and peppers in February. Even during the extreme March 2026 heatwave, all the starts have seemed delighted in the balmy sunshine box.
I'm still putting some finishing organizational touches and additional coats of paint where needed but for the most part I can now focus on planting. I still don't think I'll ever find diagnosing tomato plant leaf browning as straightforward as taking a miter saw to a 2x4". This hut hasn't made me a gardening master. But the satisfaction I feel in new infrastructure will keep me working the dirt until I finally earn my green thumb
As I write this, I've utilized life-affirming (real) spring weather to repair the backyard fence. It was the final unfun construction project on my list. Now, staring down the imminent arrival of my second child, I can commence on my next questionable endeavor: rebuilding the treehouse in the woods.