A Colorado Flower Farmer’s Guide to Seed Starting, Cut Flowers, and Growing a Garden You Love

Petals Bouder
Jan 19
4 min read

Updated: Jan 20

Here at Petals Flower Farm in Boulder, Colorado, we are committed to growing as many of our flowers as possible locally, organically, and from seed—even though our “farm” sits on what could generously be described as a postage-stamp–sized suburban lot.

I truly believe the joy a garden can bring—whether it’s a single zinnia in a jar or armfuls of flowers cut at golden hour—is unparalleled. Gardening grounds you. It teaches patience. It reminds you that good things take time.

This blog exists to support Colorado gardeners, cut flower growers, and anyone curious about starting seeds or growing flowers in our unique climate. Below you’ll find a seasonal roadmap, practical advice from the perspective of a working flower farmer, and links to deeper resources if you want to keep learning.

If you live in Boulder or along the Front Range, you’ll also find ways to support a tiny local flower farm in an era when big corporations increasingly dominate our food and seed systems—quietly, intentionally, and with dirt under our fingernails.

Step One: Start With Seeds (and Where You Buy Them Matters)

The very first thing you need to start a garden is… seeds.

Want to know exactly what we grow each year? 👉 the-flowers-we’re-growing-this-year-and-the-bouquets-you’ll-be-holding-come-june

Where you buy your seeds matters more than most people realize. Supporting small, organic seed growers is one of the most powerful ways to protect biodiversity and push back against chemical-heavy industrial agriculture. (Yes—Monsanto now owns Burpee, and no, that’s not a direction I want to move the gardening world.)

I source my seeds from a handful of trusted, mostly small producers and have written a full review of where to buy seeds for Colorado gardeners👉 [Where I Buy My Flower & Vegetable Seeds] coming soon!

This is one of the simplest ways you can make your garden—and the planet—a little healthier.

Seed Starting Basics (Without the Intimidation)

Seeds need just three things to germinate successfully:

Light
Humidity
Heat

That’s it.

You can spend hundreds of dollars, take over a third of your house, and build a seed-starting empire (ask me how I know)… or you can start a dozen seedlings with under $20 and a sunny windowsill.

I’ve written a full breakdown of the seed starting tools I actually use, including budget-friendly options and scalable setups:👉 [Seed Starting Tools for Beginners & Cut Flower Gardeners] CHECK BACK SOON!

If you buy only a few things, buy:

No kickbacks. No sponsorships. Just what works. (quick note, some links are to amazon, if you are anti-amazon - good for you - just use the links for a visual jumping off point!)

Easy Flowers to Start From Seed (Especially for Colorado)

If you’re new to seed starting—or want a guaranteed confidence boost—start here:

I grow trays of both every single year. They’re forgiving, generous, and perfect for cut flower gardens in Colorado.

You can read more about growing them specifically for cutting here:👉 [How to Grow Calendula & Zinnias for a Cut Flower Garden] COMING SOON

Know Your Zone, Know Your Frost Date

Once you have seeds and tools, the next step is understanding when to plant.

Two things matter most:

These determine when seedlings can safely move outdoors.

What Seed Starting Actually Looks Like on a Tiny Flower Farm

For those of you still reading (hi, kindred spirits), here’s what seed starting looks like on our small Boulder micro-farm this year:

January: Ordered seeds (but don’t worry—you can still order now or shop locally)
Early February: Cold stratification: all our cold strat seeds spent time in the fridge
👉 [What Is Cold Stratification & Why It Matters]
Lat February:Waking up hundreds of overwintered dahlia tubers (learn how to to this here: 👉 [wakingupyourdahlias] )
Early March: Started snapdragons, poppies, pansies, foxglove, dusty miller, nasturtium, basil, etc.
Late March: Pincushion flower, Queen Anne’s lace, China asters, chocolate lace, etc.
Early April: Orlaya, strawflowers
Mid-April: Dahlia seeds, amaranth, celosia, zinnias, globe amaranth
May: Direct sow sunflowers, pumpkins, pennycress, more zinnias

Growing Big Beauty on a Small Lot

Petals Flower Farm exists on a suburban Boulder lot—no acreage, no tractors, no illusions about scale. And yet, every season, this small space produces thousands of stems, supports pollinators, and feeds our local community with beauty.

That’s the quiet magic of micro-flower farming.

You don’t need land. You don’t need perfection.

You need curiosity, consistency, and a willingness to learn.

Want More Help (or Want to Play in the Dirt With Friends)?

If you have questions, want hands-on help, or simply want to gather your garden-loving people for something joyful—we love to lead private seed-starting parties every spring.

Birthdays, girls’ nights, team building, client appreciation—hosted in a flower-filled arboretum or in your own home with wine, guidance, and someone else cleaning up the mess.