Denver's Oldest Greenhouse Once Out-Earned Gold

Picture a guy on a bicycle. Wobbling down Colfax Avenue when Colfax was still a dirt road, a bundle of cut violets strapped on, pedaling toward the Brown Palace to make his delivery.

That was Mr. Lammermann. The year was somewhere around 1911, and the greenhouse he and his family built still stands today at 1440 Kearney Street in the Mayfair and Montclair pocket of east Denver. It is called City Floral now, and here is the part people miss. It is the oldest remaining greenhouse in the entire city. Everything else from that era is gone. This one is still open, still selling, still growing.

And this Sunday, November 8, you can walk the whole thing for free.

When flowers beat gold

Let me set the stage, because this is the detail that actually stops you.

In 1927, the annual gross income of Colorado's floral industry came out to roughly five million dollars. That same year, that number topped the value of all the metallic gold mined in the state.

Read that again. Flowers. Out-earned. Gold.

In Colorado. The state that built its whole mythology on gold and silver and guys swinging pickaxes in the mountains. For a stretch there, the real money was coming out of glass houses on the plains, not holes in the Rockies.

Historians and old-timers around here call it the Carnation Gold Rush. It ran roughly from the 1880s into the 1930s. Denver's very first greenhouse went up in 1891, and the thing just exploded from there. Between 1925 and 1927 alone, the greenhouse space used for plants and flowers in Colorado more than doubled. Doubled. In two years.

Why Colorado? The climate, honestly. The sunshine and the dry air meant growers could pull quality year-round blooms, and Colorado was rapidly becoming recognized as the carnation state. That was the reputation. People across the country knew Colorado carnations the way you know Georgia peaches.

City Floral was right in the thick of it.

What they grew on Kearney Street

The Lammermann family did not build this place to sell you a hanging basket for the porch. They built it for cut-flower production. The real trade.

Carnations, of course. But also roses, snapdragons, iris, tulips, poinsettias, chrysanthemums. All of it grown under glass, cut, and shipped out. They kept that going all the way until the 1970s, which is a wild run when you think about it. That is six decades of cutting flowers on the same block.

Then the business shifted. Bedding plants and foliage took over, which is the model most garden centers run on today. But the bones never changed. The rows of greenhouses out there now wrap around almost an entire city block. A full block of glass in a residential Denver neighborhood, humming along since before Colorado fully figured out what it wanted to be.

Side note for the real estate brain, which is always running for me. You do not find land like this sitting undeveloped in east Denver anymore. A block-long greenhouse operation in Mayfair that has survived 115 years of this city deciding to tear things down and build them bigger? That is not an accident. That is somebody refusing to sell, generation after generation. And Mayfair and Montclair have quietly turned into some of the most sought-after walkable neighborhoods on the east side, which makes that stubbornness look pretty smart.

Sunday is the day

Here is what is actually happening this weekend.

City Floral throws its free Harvest to Holiday Open House on Sunday, November 8, from 11 a.m. to 4 p.m. No ticket. No cover. You just show up and walk it.

There is a maker's market with local creators set up, so you can knock out some early holiday shopping from people who actually made the stuff. There are sales running up to 25 percent off. And if you are the type who plans ahead (Hayley is, I am not), this is when they open up pre-booking for poinsettias, Christmas trees, and holiday greens. Lock in the good ones before the December scramble.

But honestly, the shopping is not the reason to go. The reason to go is to stand inside a working greenhouse that has been doing this exact thing since 1911 and let it land for a second.

Because every other greenhouse from the Carnation Gold Rush is gone. The violets Mr. Lammermann hauled to the Brown Palace on his bike, the carnations that out-earned the gold mines, the whole forgotten boom that made Colorado the carnation state for a while. This block on Kearney is the last place where you can actually stand in it. Breathe the same warm, wet, green air they were breathing a hundred years ago.

Most people drive past it and think, oh, garden center, cool. They have no idea what they are looking at.

Now you do. Go walk it Sunday. It is free, it is a block long, and it has outlasted everything.